Weights
Test Weights in the ESSMANN Online Shop: For Precision and Accuracy
Welcome to the ESSMANN Online Shop, your B2B supplier for high-quality test weights from renowned manufacturers such as KERN and HAEFNER. Our extensive selection of weights enables you to ensure the accuracy and precision of your weighing processes and regularly check and calibrate your scales. Discover our wide range of test weights and find the perfect product for your individual requirements.The Importance of Test Weights in Industry
Test weights are essential to ensure the accuracy of scales in various industries like the food industry, pharmacy, chemistry, logistics, and more. They are used to check, calibrate, and adjust the scales to ensure they operate within the required tolerances. Test weights are available in different sizes, materials, and accuracy classes to meet the different requirements of various industries.Buy Test Weights
In our ESSMANN Online Shop, we offer you a comprehensive selection of test weights. You will find weights made of various materials like stainless steel, brass, or iron, as well as in different sizes and accuracy classes. All our weights are calibrated and certified to ensure the highest accuracy and reliability.Custom Solutions for Your Weighing Processes
Our experienced team of experts is at your disposal to assist you in choosing the right test weights and will help you compile a customized solution for your specific requirements. We also offer custom weights and calibration services to ensure that your scales always operate precisely and reliably.Conclusion
Buying Guide: Test Weights – What to Look Out for When Buying
Test weights form the basis for reliable weighing results. Whether in the laboratory, on the production floor or in goods-in: only when a balance has been correctly tested, adjusted and, where necessary, calibrated can measurement results be reliably assessed and documented. This is precisely where test weights, calibration weights and adjustment weights come into play. They enable deviations to be detected at an early stage and ensure the balance operates within the required tolerances.
As a specialist scale manufacturer, ESSMANN offers a wide range of test weights for professional applications from our leading brand partners. The focus is on traceable quality, clearly defined accuracy classes and advice tailored to real-world operating conditions.
Why test weights are so important
Scales change their measurement behaviour over time. Temperature, mechanical stress, changes in location or intensive use all affect their accuracy. Test weights are used to manage this effect. They enable you to check whether a balance is still measuring within the permissible tolerance or whether adjustment or calibration is required.
In regulated sectors such as the pharmaceutical industry, the food industry or quality management, documented checks using suitable calibration weights are essential. Even in less strictly regulated industries, regular checks ensure stable processes, less waste and greater confidence in the measurement results.
Not all test weights are the same
In practice, questions often arise: Is a simple test weight sufficient? What accuracy class is required? And what is the difference between calibration and adjustment? Firstly, it is important to understand the classification: test weights are standardised and classified according to international standards. These accuracy classes specify the maximum permissible deviation of a weight from its nominal value.
The more accurate a balance is, the higher the quality of the weight used must be. A high-resolution laboratory balance requires different calibration weights to a robust industrial or commercial balance. The choice should therefore always be based on the intended use of the balance.
Overview of the accuracy classes for test and calibration weights
Test weights are classified in accordance with the international OIML Guideline R 111. This provides a uniform basis for comparability and traceability. Before looking at the actual list, it is important to understand that a higher class does not automatically mean ‘better’, but rather ‘more precise’. For many applications, a class that is too high would be economically and practically unnecessary.
The following classes are particularly relevant in a professional context. They cover the spectrum from high-precision laboratory applications through to robust commercial and industrial uses.
- E1: High-precision test and calibration weights for extremely high-resolution balances. Typically used in metrology, calibration laboratories and reference applications. Due to the tight tolerances, DAkkS calibration is generally recommended here.
- E2: Highly accurate calibration weights for analytical balances and high-quality precision balances. Frequently used in laboratory settings where low measurement uncertainties are required.
- F1: Test weights for analytical and precision balances in industry and laboratories. A good balance between accuracy and cost-effectiveness for many applications.
- F2: A widely used class for precision balances in production, goods-in and quality assurance.
- M1: Typical test weights for industrial and commercial scales. Robust, practical and sufficiently accurate for many day-to-day testing tasks.
- M2: Trade weights for scales with lower resolution requirements, frequently used in retail and logistics.
- M3: Weights for simple commercial scales and checking applications with comparatively wide tolerances.
Materials and finishes: what matters in practice
In addition to the accuracy class, the material used for the test weights plays an important role. Stainless steel is the material of choice in laboratories and hygiene-sensitive areas, as it is corrosion-resistant and easy to clean. Brass and painted cast iron are primarily used for M-class test weights, where robustness and cost-effectiveness are the main priorities.
Design and accessories are equally important. Knob weights, block weights and wire weights each have their place. Tweezers, gloves and storage boxes are not a luxury, but help to maintain the specified accuracy in the long term.
Calibration, Adjustment and Testing: A Brief Guide
These terms are often used interchangeably in everyday language, but they have different meanings. Testing determines whether the scales are measuring correctly. Calibration records the deviation between the display reading and the reference weight, without altering the scales. Adjustment, on the other hand, is a procedure in which the scales are readjusted to correct any deviations.
To ensure reliable results, it is crucial to keep these steps clearly separate and to use suitable, certified test weights.
Buying test weights: what to look out for
Before making a purchase, it is worth carrying out a quick comparison: Which balance is to be tested, within what weighing range and with what resolution? This will determine the required accuracy class. The question of documentation is equally important. Certified test weights with ISO or DAkkS calibration certificates inspire confidence and meet both internal and external requirements.
In the ESSMANN online shop, you’ll find test weights from manufacturers such as KERN, as well as accessories for their proper handling. The range is structured so that you can put together both individual weights and complete sets for your testing procedures.
Service, calibration and expertise
ESSMANN is not just a retailer, but a specialist company in the manufacture of scales. We calibrate test weights and scales in accordance with ISO or DAkkS standards, advise on the selection of suitable calibration weights and assist you with the documentation of your testing processes. By the way: we service, calibrate (DAkkS or ISO) and repair all scales from our online shop – throughout Germany, reliably and with a practical approach.
In conclusion, it can be said that
Test weights are an essential tool for ensuring reliable and traceable weighing results. The right accuracy class, suitable material and accurate calibration make all the difference. If you are unsure which solution is right for your application, we will be happy to assist you with our experience, technical expertise and a clear focus on what matters most.