The problems of overloading: facts and consequences

Overloaded vehicles not only increase operating costs but also pose a serious threat to road safety and infrastructure throughout Europe. According to Eurostat, total road freight transport in the EU reached over 13.1 billion tonnes and 1,867 billion tonne-kilometres in 2024 – placing significant strain on roads, bridges, and vehicle fleets.

Legal implications of load compliance

Non-compliance with load regulations can have serious legal consequences. Fines for exceeding weight limits are substantial and vary depending on the severity of the non-compliance. In some cases, this can lead to the immobilisation of the vehicle or even to criminal prosecution. To avoid legal complications, precise weighing of vehicles is crucial.

Load compliance and load securing in the European Union

Compliance with legal weight and dimension limits is essential for adhering to road traffic regulations. This includes the EU transport rules on road safety, particularly those defined in Directive 96/53/EC, which sets the maximum authorised dimensions and weights for vehicles used in international road transport within the EU.

The European Union (EU) has created a comprehensive framework to regulate the weights and dimensions of commercial vehicles operating in its member states. These regulations, set out in Directive 2015/719/EU, are designed to ensure road safety, fair competition and the protection of road infrastructure throughout the region.

Load compliance and load securing in the European Union

At the EU level, load compliance and cargo securing are primarily governed by Directive 2014/47/EU on the technical roadside inspection of the roadworthiness of commercial vehicles. This directive includes minimum requirements for the securement of loads during transport to ensure road safety, prevent accidents, and protect infrastructure.

Key elements of EU load securing requirements include:

Suitable industrial scales for the transport industry

Selecting the right industrial truck scale depends on the specific application and requirements in your fleet. The main scale types for the transport industry are explained below.

Axle weighers

Axle load scales measure the weight of each axle of a vehicle and are ideal for mobile weight enforcement on the spot. Axle load scales such as the Gram PR are particularly useful for ensuring that individual axles of a truck do not exceed the permissible weight restrictions. They offer a high level of accuracy, are easy to transport and enable quick measurements.

Benefits of mobile axle weighing in the transport industry

• Flexibility: Thanks to the portable design, vehicles can be weighed anytime, anywhere, without having to drive to the fixed weighbridge.
• Durability and robustness: Gram PR truck scales are made of robust aluminium and are suitable for daily use in a fleet.
• Connectivity: Integration with fleet management software enables smooth data processing and facilitates documentation for compliance with regulations.

Platform scales

Platform scales, such as our Gram Next Xtrem® Buffalo, Gram Next Xtrem® Bengal or TX Tiger, are ideal for weighing larger items of cargo and goods before they are loaded onto the vehicle. They are flat and stable, which makes it easy to place heavy loads. Floor scales are usually stationary and offer high capacities for a wide range of objects. They can also be installed below ground level or in a pit, which means that they can be built into the ground and make loading with forklifts even easier and more efficient.

Advantages of floor scales in the transport industry

• High capacity floor scales are able to weigh heavy loads and large freight items, making them ideal for use in distribution centres and warehouses
• Efficient loading and unloading: Thanks to their flat design, freight and pallets can be easily lifted onto the scale or placed with forklifts, speeding up the loading process.
• Easy to use: They are user-friendly and require little training, which simplifies the workflow in warehouses and terminals.

Heavy-duty scales

Heavy-duty scales like the Gram Next Xtrem® Speed are designed for weighing complete vehicles. These stationary scales offer a very high capacity and are suitable for large trucks and trailers. They ensure precise weight determination of the entire vehicle and its load, which is particularly important for regulatory compliance.

Benefits of heavy-duty scales in the transport industry

• High capacity: Heavy-duty scales can weigh extremely high loads, often up to several hundred tonnes, making them ideal for use with heavy-duty trucks, trailers and construction equipment.
• Precision at large scales: Despite their large capacity, heavy-duty scales provide precise weight measurement, which is particularly important for ensuring compliance with legal regulations and avoiding overloading.
• Increased safety: Accurate weighing of vehicles and their loads helps to prevent overloading, which could lead to accidents, damage to vehicles or infrastructure.

Factors to consider when choosing truck scales

Striking the right balance between price, accuracy, capacity and durability is crucial for long-term efficiency and legal compliance.

Conclusion: Safety, efficiency, and compliance all start with weighing

Challenges in the transport industry are complex—but overloading doesn’t have to be one of them. With the right industrial scale—whether mobile, stationary, or integrated into your processes—you lay the foundation for legally compliant, cost-effective, and sustainable transport.

Avoid fines, reduce operating costs, and protect your fleet through precise weighing.

Get professional advice now and find the right scale solution for your fleet. We’re here to help you make the best decision.

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In this new article, you’ll discover why pallet scales are an essential tool in logistics and industrial operations, how different types cater to specific needs—from standard models to those designed for heavy loads or equipped with extra features like printers—and where they are commonly used across various sectors. You’ll also get practical guidance on how to evaluate and choose the right pallet scale solution based on your warehouse setup, workflow requirements, and compliance needs.

Why Pallet Weighing Scales Are Essential in Logistics

1. Integrated Weighing = Less Time, Fewer Moves

Traditional weighing involves bringing each pallet to a fixed scale. Pallet scales like the Gram Lite TCamel Y or the U-shaped Accurex TX Snake eliminate this step. You can weigh directly where work happens.

Benefits:

• Fewer pallet movements
• Faster workflows at inbound/outbound gates
• No ramps or stationary scale needed

2. Accurate Billing and Stock Control

Precise weight data is critical for:

• exact freight cost calculation
• accurate inventory levels
• avoiding disputes with carriers or customers

Models with printer integration and real-time data capture (e.g. Gram Next Xtrem Scorpion with K3X indicator) ensure reliable documentation.

3. Legal Compliance: Trade-Approved Pallet Scales

In the EU, trade-approved pallet scales (Class III) are mandatory if weight determines the price. Our Gram Next Xtrem Scorpion and Gram Next Xtrem Penguin are available in certified versions. You can find out more about the Verification and regulations here.

Pallet Scale Types at a Glance

U-Shaped Pallet Scales – the logistics all-rounder

• Designed for standard Euro pallets (1200 x 800 mm)
• Drive in with a pallet truck, no ramp needed
• Typical capacity: 1500kg to 3000kg
• Models: Accurex TX Snake, Gram Next Xtrem Zebra, Gram Next Xtrem Zebra S

Pallet Truck Scales

• Ideal for mobile, on-the-go weighing
• Optional printer integration
• Models: Gram Lite TCamel Y or Gram Core TCamel
• Waterproof stainless versions (e.g. Gram Core TCamel 2T Inox 316) for food & pharma

Weigh Beams

• Adjustable to different pallet sizes
• Great for non-standard or oversized loads
• Compatible with multiple display units
• Models: Gram Next Xtrem Zebra and Accurex TX Fox

Drive-Through Pallet Scales

• Ultra-low profile and ramps for fast loading
• Ideal for high-volume shipping zones
• Optional: PC software, label printer, Industry 4.0
• Models: Gram Next Xtrem Penguin and Gram Next Xtrem Condor

Forklift Weighing Systems

• Weigh while lifting – wireless & battery-powered
• Real-time data transfer via WiFi
• No workflow changes needed
• Model: Gram Core Bull

Industries that use Pallet Weighing Scales

Logistics & Distribution Centres

For fast, accurate check-in/out of goods. 1500kg U-shaped pallet scales are ideal for standard Euro pallet handling.

Manufacturing & Construction Industry

Use pallet scales with printers for material supply, stock control, and in-line quality checks. Certified versions ensure compliance.

Food & Hygiene Environments

Use waterproof stainless steel scales (IP67/IP68) for HACCP compliance and easy cleaning. E.g. CoreTCamel Inox V4A.

Chemical & Pharmaceutical

Trade-approved pallet scales are mandatory when weight affects billing or traceability. Data integration and overload protection are often required.

Smart Connectivity: Xtrem® Software

Many models support Xtrem® Software, enabling:

• Real-time weight tracking
• WiFi, USB, RS232 connectivity
• Label & ticket printing
• ERP/WMS integration
• Automated inventory records

This makes your pallet weighing process faster, smarter and more connected.

Final Thoughts: Why U-Shaped Pallet Scales lead the Way

U-shaped pallet scales are the most efficient solution when working with Euro pallets. They:

• save time,
• reduce handling steps,
• ensure accurate data,
• and fulfil trade regulations in the EU.

Whether you need a pallet scale, a trade-approved pallet scale, or a model with printer – we’ve got the right solution for your workflow.

Explore our Europe pallet scale range for logistics now

The post U-Shaped Pallet Scales for Euro Pallets: Fast, Certified and Built for Logistics appeared first on Gram Group · Weighing Systems.

To prevent these risks and maximise efficiency in the logistics chain, modern weighing systems are indispensable. By using precise scales in combination with intelligent software such as Xtrem® software, companies can significantly reduce their logistics costs. These technologies not only provide high measurement accuracy, but also real-time data tracking and automated reporting to optimise processes and avoid losses due to inaccuracies.

The role of weighing in logistics and supply chain management

Popular weighing systems in logistics to reduce your costs

Data management with Xtrem® technology in logistics and integration into your systems

Xtrem® software provides a comprehensive solution for data management in logistics, helping to reduce costs and increase efficiency through accurate weighing data and seamless system integration. Key benefits and features include:

Cut logistics costs through smart weighing solutions

In an industry where every kilogram counts, accurate and efficient weighing is no longer a luxury — it’s a competitive advantage. From optimising load distribution and preventing fines to streamlining warehouse operations and increasing customer satisfaction, modern weighing systems are essential components of a successful logistics strategy. When paired with powerful software like Xtrem®, these systems become even more valuable by providing real-time data, automation, and insights that reduce manual work and operating costs.

Whether you’re managing a fleet, a warehouse, or a supply chain — investing in high-quality weighing solutions is an investment in long-term efficiency and profitability.

Explore our full range of Industrial Scales for Logistics and discover how the right weighing systems can transform your operations.

The post How to reduce your logistics costs by using modern weighing systems appeared first on Gram Group · Weighing Systems.

1. Balance vs. Scale: Core Differences

2. What Is a Balance?

A balance is a precision instrument that determines mass by comparing an object with a known standard. Modern balances rely on electromagnetic force restoration (EMFR) to measure the weight of an object with extremely high precision. Although these instruments are commonly referred to as “balances,” they technically measure weight —like all electronic weighing devices.

A Balance in a technical sense:

A traditional balance consists of a horizontal beam pivoted at its center, with two pans suspended from either end. The substance to be weighed is placed in one pan, and standard weights are added to the other until the beam is level. Interestingly, each pan is technically called a “scale”—a linguistic detail that reflects the historic overlap in terminology.

Typical Applications of a Balance:

• Scientific research and R&D
• Pharmaceutical dosing
• Laboratory analysis
• Quality control in manufacturing

Key Advantages of a Balance:

• High resolution and accuracy
• Less affected by environmental variables like gravity
• Ideal for controlled lab environment

3. What Is a Scale?

In English, “balance” typically refers to a precise laboratory instrument for small loads, while “scale” is used for general-purpose or industrial weighing devices—though in casual speech, the terms are often used interchangeably. A scale measures weight, which is the force exerted by an object due to gravity. This is typically done through load cells, which convert mechanical force into an electrical signal.

Typical Applications of a Scale:

• Industrial weighing
• Retail and logistics
• Agricultural and food processing
• Shipping and warehouse operations

Key Advantages of a Scale:

• Suitable for heavy and large items
• Designed for rugged, high-throughput environments
• Often more affordable than precision balances

Note: In electronic instruments, the distinction between “balance” and “scale” becomes mostly semantic. All electronic devices measure weight (force due to gravity), regardless of how precise they are or what terminology is used.

Still unsure which device is best for your application?

Contact our experts for tailored advice and recommendations.

The post What Is the Difference Between a Balance and a Scale? appeared first on Gram Group · Weighing Systems.

While the EU Directive 2014/31 provides a regulatory framework for accuracy classes within the European Union, the International Organization of Legal Metrology (OIML) plays a crucial role in shaping global standards for measurement accuracy. The OIML develops international recommendations and guidelines that serve as a reference for national and regional regulations, including those in the EU.

OIML Recommendations and their accuracy classes

The OIML has published several recommendations that align with the concept of accuracy classes of the EU Directive 2014/31. For example:

• OIML R76: This recommendation covers non-automatic weighing instruments and defines accuracy classes (I, II, III, IIII) similar to those in the EU Directive.
• OIML R111: This recommendation focuses on calibration weights and defines weight classes (E1, E2, F1, F2, M1, M2, M3) that correspond to the accuracy requirements of weighing instruments.

These OIML recommendations provide a global benchmark for accuracy classes, ensuring consistency in measurement practices across different countries and regions.

The Connection between accuracy classes and OIML weight classes

Accuracy classes for weighing instruments are closely linked to the OIML weight classes used for calibration. Calibration weights are categorized into classes (E1, E2, F1, F2, M1, M2, M3) based on their precision, and these classes correspond to the accuracy requirements of weighing instruments. For example:

• Class E1: This class has the highest accuracy and is primarily used in highly precise laboratory environments.
• Class E2: These weights are also used in precision applications, especially for calibrating measuring devices and verifying weights of class F1.
• Class F1: Weights of this class are used for calibrating high-quality precision scales and for verifying weights of class F2.
• Class F2: These weights are used in general industrial and commercial metrology. They are used for calibrating scales and for verifying weights of class M1.
• Class M1: This weight class is typically used in the industry for calibrating commercial scales.
• Class M2: These weights are intended for less accurate measurements and are often used in commerce or in other applications with lower accuracy requirements.
• Class M3: This class has the least accuracy and is used for simple commercial and industrial applications where precision requirements are minimal.

The choice of the appropriate weight class depends on the required accuracy of the measurement and the type of scale or measuring device to be calibrated. Using OIML-certified weights ensures the accuracy and reliability of measurements in various application areas.

What are Permissible Error Limits?

The permissible error limit for test weights defines the maximum allowable deviation from the actual mass of a test weight used for calibrating scales. These limits are set in the OIML guideline R 111 for different accuracy classes. The tolerance is equated with the measurement uncertainty of the test weight. For example, a 1 g test weight can illustrate how manufacturing tolerances differ from class E1 to M3. For a class E1 test weight, the error limit is ± 0.010 mg, i.e., 0.00001 g. In class F1, the tolerance is ± 0.10 mg, while in class M3, it is ± 10 mg.

How OIML supports the EU Directive

The OIML and the EU collaborate closely to harmonize measurement standards. Here’s how OIML supports the EU Directive on accuracy classes:

1. Standardization: OIML recommendations serve as a basis for EU regulations, ensuring that accuracy classes are consistent with international standards.
2. Mutual Recognition: OIML certificates and test reports are recognized in the EU, facilitating the free movement of goods and reducing trade barriers.
3. Technical Expertise: OIML provides technical guidance and best practices that help EU member states implement and enforce accuracy class requirements.
4. Global Harmonization: By aligning EU standards with OIML recommendations, the EU ensures that its measurement practices are compatible with those of other countries, promoting international trade.

Both the EU Directive 2014/31/EU and OIML recommendations play vital roles in defining accuracy standards. While the EU directive focuses on regional regulations, OIML ensures global standardization, fostering trust and consistency in international trade.

For those looking to purchase compliant weighing instruments, selecting a scale based on the correct accuracy class is essential. Visit our analytical balances and precision balances to find the right device for your needs.

The post What is OIML? appeared first on Gram Group · Weighing Systems.

Metrology, the science of measurement, provides this infrastructure. It ensures that measured values are comparable and traceable worldwide – thus creating trust in processes, products, and systems.

On the occasion of World Metrology Day we take a look at the importance of metrology – and highlight the central role it plays, particularly in the field of industrial scales.

What is metrology?

Metrology is the science of measurement. It deals with the definition of units of measurement, the practical implementation of these units, and ensuring the traceability of measurements to international standards. This discipline is divided into three main areas:

• Scientific metrology: The development and maintenance of units of measurement and measurement standards.
• Industrial metrology: The application of measurement methods in production and quality assurance.
• Legal metrology: The monitoring of measurements subject to legal requirements, e.g., in trade or healthcare.

Metrology ensures that measurements are consistent and comparable worldwide, which is essential for technological innovation and economic progress.

A Brief Look Back: The Origins of Modern Metrology

While systems of measurement have existed since ancient times, modern metrology began to take shape with the introduction of the metric system in 1799, which for the first time relied on scientific principles rather than arbitrary standards. The Metre Convention of 1875 marked a decisive step toward international standardization and led to the creation of the International Bureau of Weights and Measures (BIPM). Today, the International System of Units (SI) – based on seven base units (second, meter, kilogram, ampere, kelvin, mole, and candela) – provides the global standard for all scientific and industrial measurements.

In addition to SI-compliant units such as grams and kilograms, alternative weight units such as pounds (lb), ounces (oz), carats (ct), pennyweights (dwt), mommes (mo), and taels (tl) are also used in practice – particularly in logistics, precious metals trading, or in certain regional markets such as the Anglo-American region or Asia. Modern industrial scales enable precise and legally compliant use of these units of measurement thanks to metrologically defined conversion.

Why is metrology important?

Precise measurements are crucial for:

• Science and technology: Accurate data is the foundation for research and development.
• Industry and manufacturing: Quality control and efficiency depend on accurate measurements.
• Healthcare: Diagnostic devices and dosages require precise calibration.
• Environmental protection: Measurements of emissions and environmental parameters are essential for protecting our planet.

Without consistent and accurate measurement standards, many advances in these fields would not be possible.

The Relevance of Metrology in Industrial Scales

Industrial scales are a perfect example of the importance of reliable measurement technology in everyday life – especially in manufacturing, logistics, laboratories, warehousing, and shipping.

Metrologically reliable industrial scales are key for numerous industrial and legal requirements:

• Traceable accuracy: Scales must be traceably calibrated to national and international standards. This is the only way to ensure comparable and legally compliant results. Traceable calibration refers to the verification and adjustment of a measuring instrument using a reference standard whose accuracy can be proven to be based on a national or international standard. This ensures that measurement results are reliable, traceable, and comparable worldwide.
• Verification requirement: In many applications – such as commercial transactions or billing by weight – legal verification of the scale is mandatory. This is where legal metrology applies.
• Quality assurance: In production, deviations of just a few grams or milligrams often determine whether a product is rejected or approved.
• International trade: Companies operating globally must ensure that measurement systems meet the same standards everywhere.

World Metrology Day 2025 – Measurements for all times, for all people

World Metrology Day is celebrated every year on May 20th to commemorate the signing of the Metre Convention in 1875. This international agreement laid the foundation for a unified system of measurement and promoted global cooperation in metrology.

In 2025, World Metrology Day marks the 150th anniversary of the Metre Convention. The motto is “Measurements for all times, for all people.” This theme emphasizes the universal importance of precise measurements for all aspects of life, from science to industry to everyday life.

UNESCO will celebrate this anniversary with a symposium in Paris where experts, scientists, and decision-makers will discuss the role of metrology in a sustainable future.

Follow us on LinkedIn for special content and insights celebrating World Metrology Day, including insights into how metrology supports industry and quality standards.

The post Understanding Metrology: The Science of Measurement and Its Global Significance appeared first on Gram Group · Weighing Systems.

Why does an industrial scale need to be calibrated?

An industrial scale must be calibrated to ensure accurate and reliable measurement results, as numerous factors can affect accuracy. These include environmental conditions such as temperature and humidity fluctuations, placement of the scale on an unstable surface, and the condition of the load cells. Regular calibration is also necessary to correct for deviations due to wear and tear. Other factors such as vibrations and mechanical disturbances can also affect the accuracy of measurements, which is why regular maintenance is essential.

What are the signs that a scale needs to be recalibrated?

Signs that a scale needs to be recalibrated include:

• Inconsistent or fluctuating readings
• Readings that do not return to zero when the scale is empty
• Discrepancies when weighing known weights
• Physical damage to the scale or its components

Regular checks with known weights can help to identify these problems at an early stage

Types of Calibration

Industrial scales can be calibrated either manually by in-house personnel or an external service provider, while modern scales often have an internal automatic adjustment feature that allows for automatic calibration without human intervention.

Step-by-step guide to calibrating an industrial scale

1. Prepare the scale

• Cleaning and levelling: Thoroughly clean any dirt, dust or debris from the weighing platform. Use a spirit level to ensure that the scale is perfectly level. This is important to avoid measurement errors caused by incorrect alignment of the scale.
• Check the ambient conditions: Make sure that the environment is stable and free of vibration, strong air currents and temperature fluctuations.
• Check the GEO value: The GEO value takes into account the influence of geographical location on the accuracy of the scale. Since gravity varies slightly at different locations on Earth, the GEO value must be set correctly to ensure accurate results. Check that the GEO value of your scale is set to the correct geographical region to avoid calibration errors.
• Follow manufacturer’s instructions: Always follow the manufacturer’s specific calibration instructions to ensure that the calibration is carried out correctly and to the required standards.

2. Calibration process

• Select test weights: Use certified, traceable test weights that cover the entire weighing range of your balance.
• Zero the scale: Switch on the scale and allow it to stabilise. Zero the scale to ensure that no tare weights are included in the calculation.
• Loading Weights: Place the test weights on the platform in increments, waiting for the scale to stabilise before adding the next weight. Test various load points, such as 25%, 50%, 75% and 100% of capacity. To check the uniformity of the measurements, also place the weights in the four corners of the weighing platform.
• Unload weights: Remove the weights in reverse order, allowing the scale to stabilise at each step.

3. After calibration

• Check accuracy: Recheck the measurement results using known weights. The measurement values should be within the acceptable tolerance range of the scale.
• Make adjustments: If the scale is outside the tolerance range, adjust the settings according to the manufacturer’s instructions.
• Documentation: Record the date, time, test weights used, and any adjustments or deviations in the calibration record.

4. Maintenance and inspection

• Regular maintenance: Check the scale regularly for wear and tear and carry out scheduled calibrations to ensure long-term accuracy.

Further tips for calibrating and maintaining your industrial scale

• Timing of calibration: Create a fixed schedule based on frequency of use and environmental conditions. Typically, an industrial scale should be calibrated at least once a year. With frequent use or extreme conditions such as dust or temperature fluctuations, calibration every six months may be advisable. Also, follow the manufacturer’s recommendations for calibration intervals to ensure long-term accuracy.
• Appropriate use: Always use the scale within its specified weighing range. Overloading or weighing objects that exceed the maximum capacity of the scale can damage the load cells and other sensitive components, which can affect accuracy and cause expensive repairs. Make sure that the material to be weighed always remains within the permissible range.
• Careful Handling Avoid shock loads caused by the sudden dropping of heavy objects onto the scale. Such impacts can damage the scale’s mechanical and electronic components and lead to inaccurate measurements. Use lifting devices or transport aids to carefully place heavy loads on the weighing platform.
• Cleaning the weighing platform: Regular cleaning of the weighing platform is essential to ensure the function and accuracy of the balance. Remove dirt, dust and debris from the platform, as these can affect the weighing result. Use mild detergents and a soft cloth to avoid damage to sensitive parts. Ensure that the scale is completely dry before using it again to prevent corrosion or short circuits.
• Checking load cells: Load cell inspections should be carried out regularly to ensure that they show no physical damage or wear. Defective or dirty load cells can significantly affect the accuracy of the scale.
• Protect from extreme conditions: Keep the scale away from extreme temperatures, humidity, dirt and chemical substances that could damage the electronics and mechanics. A well-protected working environment extends the service life of the scale and reduces maintenance costs.
• Calibrate under stable working conditions Temperature changes can affect the weighing accuracy of scales. Therefore, calibration should be carried out under stable temperatures that correspond to the actual working conditions. A significant temperature increase or decrease between calibration and use can lead to measurement errors and affect the accuracy of the scale.
• Digitise calibration records: Integrate digital recording systems to efficiently store calibration and maintenance data. This not only facilitates traceability, but can also improve efficiency during audits and compliance with standards such as ISO 9001.
• Training for calibration personnel: Regular training of personnel is essential to ensure that calibrations are carried out correctly and that new technologies or methods are incorporated into practice.

When should calibration be carried out by specialists?

On the other hand, more complex and high-precision scales are often better calibrated by specialists. These include scales used in industries such as pharmaceuticals, aerospace and manufacturing, where extreme accuracy is essential. Also, industrial scales, vehicle scales, crane scales and other large scales usually require specialist calibration due to their size and the complexity of the calibration process.

Calibration vs. verification – what’s the difference?

• Calibration is the process of checking the accuracy of a scale by comparing its readings to a known reference weight. This determines whether the scale is measuring correctly and adjustments are made as needed. It can be done regularly and as needed to ensure that the scale is providing accurate results, but it is not a legal requirement.
• Verification is a legally required process in which the scale is inspected by an official body to ensure that it meets legal standards and requirements. During verification, not only is the accuracy checked, but it also determines whether the scale is approved for trading. After passing the verification, the scale receives an official seal that confirms its compliance. Unlike calibration, verification may only be carried out by authorised auditors.

Calibrating verified Scales

There is no difference in the calibration process between verified and non-verified scales. In both cases, the check is carried out using test weights. While there are no legal requirements for calibration, verification is mandatory by law. Calibration is recommended but not legally required.

In practice, industrial scales should be calibrated at least once a year. For heavy use or challenging environments (e.g. dust, temperature fluctuations), calibration every six months is advised. Always follow the our manufacturer’s calibration guidelines.

The post Calibrating industrial scales – A guide to accurate measurements appeared first on Gram Group · Weighing Systems.

What are accuracy classes?

Accuracy classes are a way to categorize measuring instruments based on their precision and the maximum permissible errors (MPEs) they are allowed to have under specific conditions. These classes ensure that instruments used in trade, such as weighing scales, fuel dispensers, or electricity meters, meet consistent standards of accuracy.

Accuracy classes contribute to the categorisation of scales in many ways:

• They are used to determine the suitability of the balance for certain applications.
• They define the tolerance limits that are applied when testing the balance.

The different accuracy classes of non-automatic weighing instruments

In the EU Directive 2014/31, so-called accuracy classes are defined. The following mass and weight units are permitted:

• SI units: Kilogram, microgram, milligram, gram and tonne.
• British units: Troy ounce (when weighing precious metals).
• Other units: Carat (when weighing precious stones).

For a scale to be assigned to a specific accuracy class, it must meet certain criteria. Classification is based on two aspects:

1. The number of verification scale intervals(n): This refers to the ratio of the capacity of the scale to its smallest representable unit, i.e. resolution.
2. The verification scale interval (e): This is the smallest weight interval that can be used in weight-based price determination with a particular scale in a trading context.

What is the verification scale interval (e)?

For weighing instruments, the verification scale interval (e) refers to the smallest legally approved and technically possible scale interval. In other words, it determines the smallest weight that the scale can reliably measure.

The verification scale interval (e) is given in the same unit of measurement as the weight value (for example, grams, kilograms, i.e. the SI units mentioned above). A scale with a verification scale interval (e) of 1 gram would, for example, round weights to the nearest whole gram. A scale with a verifitication value of 0.01 grams, on the other hand, could measure weights to the nearest hundredth of a gram.

Accuracy classes: A decisive categorisation for non-automatic weighing instruments

The following accuracy classes – related to the verification scale interval (e) – have been defined by the legislaton depending on the requirements:

1. Class I: Special These scales are particularly precise and are suitable for accurate measurements in laboratories or special applications. The verification scale interval (e), i.e. the smallest unit of weight that the balance can measure, is at least 0.001 grams.
2. Class II: High. These scales have a slightly lower accuracy than class I, but are still precise.
3. Class III: Medium. These scales are used in commercial environments such as shops or supermarkets. They are less precise than class II, but still sufficiently accurate for commercial use.
4. Class IIII: Ordinary. These scales are used for coarse measurements where high accuracy is not required. The verification scale interval (e) is at least 5 grams.

The following table shows the accuracy classes with the number of scale intervals (n) and the verification scale interval (e).

The accuracy classes illustrated with an example

Accuracy class I

Analytical balances are a special type of balance usually used in laboratories or medical facilities. It is used to measure the mass or weight of substances or objects with high accuracy. Analytical balances are designed to take very precise measurements and can often be accurate to several decimal places.

If we want to calculate the number of scale intervals (n), then the weighing range of 120 grams here corresponds to the capacity and the readability remains at 0.0001 grams.

With the formula n = ((Max)/(e)) = 120/0.0001 we get the result of 1 200 000. Thus this scale belongs to accuracy class 1.

Accuracy class II

A precision balance is a measuring instrument used to measure the weight or mass of an object or substance with high accuracy. Precision scales are often used in laboratories and industrial environments where accurate measurements are critical.

Using the formula n = ((Max)/(e)) = 500/0.001, we get the result of 500.00. Thus, this scale belongs to accuracy class 2.

Accuracy Class III

Accuracy Class III scales are commonly used for commercial weighing of products such as precious metals, semi-precious stones, animals, laundry, mail, and vehicles. These scales are designed to handle a wide variety of applications, including general commercial uses that require moderate precision.

For scales in this class, the readability (e) typically falls between 0.1 g and 2 g, and the scale’s capacity can range accordingly.

If we want to calculate the number of scale intervals (n), for example, for a scale with a maximum capacity of 3000 grams and a readability of 0.1 grams, we can use the formula:

With the formula n = ((Max)/(e)) = 3000/0.1, we get the result of 30,000. However, due to legal restrictions, the number of scale intervals is limited to 10,000. Therefore, this scale belongs to Accuracy Class III.

For higher capacities and heavier loads (e.g., livestock, vehicle scales), if the readability (e) is 1 gram, we would calculate the number of intervals as follows:

Using the formula n = ((Max)/(e)) = 5000/1, we get the result of 5,000. This still meets the specifications for Accuracy Class III.

Accuracy Class IV

Accuracy Class IV scales are commonly used for weight checks in road traffic, such as vehicle scales. These scales are typically used for weighing vehicles, including trucks and large machinery, where precise measurements are important, but the highest accuracy is not required.

For scales in this class, the readability (e) typically ranges from 5 g to 0.1 g, with the minimum value for the number of scale intervals (n) being 100 and the maximum being 1,000.

Example with a capacity of 10,000 g (10 kg) and readability of 20 g:

Using the formula n = ((Max)/(e)) = 10,000 / 20, we get the result of 500. Therefore, this scale belongs to Accuracy Class IV.

Example with a capacity of 10,000 g (10 kg) and readability of 50 g:

Using the formula n = ((Max)/(e)) = 10,000 / 50, we get the result of 200. This scale also belongs to Accuracy Class IV, as the value for n falls within the allowed range of 100 to 1,000.

Example with a capacity of 20,000 g (20 kg) and readability of 100 g:

Using the formula n = ((Max)/(e)) = 20,000 / 100, we get the result of 200. This scale would also belong to Accuracy Class IV.

The post Understanding Accuracy Classes in Legal Metrology – EU Directive 2014/31 appeared first on Gram Group · Weighing Systems.

A scale is basically an instrument designed to measure the weight of an object. It usually consists of a platform or hanging device and an indicator on which the weight can be read. By placing the object to be weighed on the platform or hanging it from the hanging device, the weight can be determined.

In the field of scales, however, there are different types and categories, which are differentiated according to the area of application and functionality. An important distinction in the industrial sector is that between non-automatic and automatic scales.

Non-automatic vs. automatic scales

A non-automatic weighing instrument (NAWI) – often referred to in the guidelines mentioned below in particular – is a type of weighing instrument that requires measurement by operators. A non-automatic weighing instrument has a scale or display on which the weight of the object to be weighed can be read. The use of NAWI is widespread in commerce, industry and other areas where precise measurements are required.

In contrast, there are self-acting scales that perform the weighing automatically. The process of weighing is always started by itself and consequently, self-acting scales play a crucial role in the automation of industrial production.

In the following part, we will focus on non-automatic weighing instruments and the regulations that must be observed.

What is a verified scale?

A verified scale is a non-automatic weighing instrument that has been subjected to verification and that complies with the legal requirements (in particular EU Directive 2014/31, EU Directive 2014/32 – also known as MID) in legal metrology, as well as being subject to regular inspection by the Weights and Measures Office.

The aim of verification is to protect the consumer and the public interest. Verification by an authorised body ensures that the scale provides accurate and reliable weight measurements and that verification error limits are observed.

When do verified scales have to be used?

Directive 2009/23/EC on non-automatic weighing instruments states that verified instruments must be used in the following circumstances:

• Determination of mass for the purposes of commercial transactions,
• Determination of quantity for the calculation of a toll, tariff, tax, bonus, penalty, allowance, compensation or similar type of payment.
• Determination of quantity for the application of laws or regulations; expert evidence in legal proceedings.
• Determination of price on the basis of quantity for the purposes of direct sale to the public and the assembling of prepackages.
• Determination of mass in the practice of medicine when weighing patients for the purposes of medical supervision, examination and treatment.
• Determination of quantity in the practice of medicine for weighing patients for the purposes of monitoring, diagnosis and medical treatment.
• Determination of quantity for the preparation of medicines on prescription in a pharmacy and determination of quantity in analyses in medical and pharmaceutical laboratories.

How do you recognise a verified scale?

The so-called verification seal or also metrology marking (M) with corresponding CE marking expresses that the scale complies with the legal regulations.

Sealing switch for industrial weighing systems: Important function for verification and safety

The seal switch plays a crucial role in the verification and security of scales, especially in commercial and industrial environments. This special switch, often referred to as a seal switch, is an essential element that ensures the integrity and compliance of a calibrated scale.

What is a seal switch?

The seal switch is a safety mechanism that is built into many scales. It is used to control and secure access to the calibration and adjustment settings of the scale. After Verification, the seal switch is sealed to prevent unauthorised or unintentional changes. This ensures that the scale continues to comply with legal requirements and calibration standards.

Handling the sealing switch

• Verification and sealing: After a scale has been verified, the sealing switch is sealed by an authorised verification body. This is to ensure that the settings of the scale have not been changed since the last verification.
• Maintenance and repair: If a scale requires maintenance or repair, it may be necessary to remove the seal. In this case, the scale must be re-verified and the sealing switch resealed to ensure conformity with legal requirements.

Using verified scales is essential in various industries to ensure precise measurements, compliance with legal regulations, and consumer protection. At Gram Group, we understand the critical role of reliable weighing systems in your operations. Our range of high-precision scales meets the highest industry standards, ensuring compliance and performance you can trust.

Contact us to learn more about our verified scales and how we can support your weighing needs.

The post Everything you need to know about scales: verification and regulation appeared first on Gram Group · Weighing Systems.

This International Women’s Day, we are amplifying the voices of women who are shaping the industrial sector. From leadership roles to technical positions, they share their experiences, insights, and messages for the next generation of women in the field.

Insights from Women in the Industry: Challenges and Leadership

“This statistic highlights a structural issue that isn’t improving on its own, which means the industry needs to take a more active role in changing it. The underrepresentation of women in the industrial sector is not just about hiring—it’s about a lack of visibility, access, and long-term career opportunities.”

Shanna Hermann, Co-CEO

According to Shanna, one of the biggest challenges women face in the industrial sector is perception. “Industrial work is still seen as a male-dominated field, which discourages young women from considering it as a career path. Another issue is the lack of role models in leadership positions, which makes it harder for women to see a future for themselves in the sector.”

She also highlights that leadership diversity remains a key barrier, as hiring and promotions are rarely neutral. “People tend to hire those they feel more comfortable with, whether that’s in gender, age, or background. And as long as most decision-makers are men, that cycle keeps repeating itself unless we actively break it.”

While large corporations often implement quotas to force change, in smaller companies like Gram Group, gender diversity depends largely on available talent. “We don’t hire based on gender, but we do pay attention to making sure women have the same career opportunities as men.”

For real change to happen, companies must take an active role in promoting industrial careers to young women, ensuring fair and transparent hiring and promotion processes, and fostering inclusive workplace cultures. “At Gram Group, we believe innovation comes from diverse perspectives. The more we actively work toward equity, the more we strengthen our industry as a whole. Success shouldn’t be tied to a single leadership style—everyone should be able to lead in their own way, as long as it is respectful and authentic.”

Shifting Mindsets in the Industrial Sector

“The mentality of people is something that is more difficult to change, especially in traditionally male-dominated environments. Discrimination might happen during the recruitment process, in horizontal or vertical relationships within the company. Fortunately, more and more companies recognize women as fully valid members of their staff, even in leadership position. It is a joint task for parents, educators, employers and law-makers”

Iga Kulig, HR Administration

Iga points out that achieving true gender equity in the industrial sector requires more than just legal changes; it’s about shifting generations-old mentalities. “We can change laws quickly and seek theoretical equality, but real transformation takes time—it’s a work of generations.”

Breaking Barriers in Technical Roles

“I have always been fascinated by how things work and how technology can improve industrial processes. Since I was a child, I was curious about electronic devices, wanting to understand how they functioned.”

Estefanía Barneto, SAT/Tech Support

Estefanía emphasizes that the demand for skilled professionals in electronics is high, but not many pursue this path, making it a great opportunity for women who are passionate about technology. “I want my experience to serve as a message of hope for those who may encounter difficulties along the way. If one place does not value you, there is always the possibility of changing and finding the right environment.”

Her message to young women interested in industrial technology or engineering is clear: “We live in a time where stereotypes no longer define which jobs are for men or women. If you are passionate about a profession, have a good attitude, and work hard, you can achieve whatever you set your mind to.”

Encouraging Future Generations

“The participation of women in the industrial sector has been increasing, but there is still a gap since the industry has historically been male-dominated. Women have gained ground, especially in fields like engineering and technology, thanks to equality policies and specialized training programs.”

Nieves González, Customer Support

Nieves emphasizes the importance of continuing to foster inclusion and career development within the industry. “It is essential to keep creating opportunities and supporting professional growth so that everyone, men and women alike, have the same chances to advance.”

Her advice to young women interested in the industrial sector: “Do not be afraid to explore all the opportunities this sector offers. The industrial field is diverse and full of potential in areas like engineering, technology, logistics, and design. It is crucial to keep learning, join internship programs, and never let stereotypes or prejudices hold you back.”

Driving Change for an Inclusive Future

The industrial sector is evolving, and the role of women within it is becoming more prominent than ever. As more women enter the field, break barriers, and redefine expectations, the industry will only become stronger and more inclusive.

On this International Women’s Day, we recognize the resilience, contributions, and leadership of women in the industrial sector. Their voices are shaping the future, challenging norms, and paving the way for the generations to come. The journey toward true equity is ongoing, but every step forward brings us closer to a more diverse, innovative, and inclusive industry.

The post Women Who Weigh In: Voices from the Industrial Sector appeared first on Gram Group · Weighing Systems.