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Calibration Weights

Calibration Weights are used when calibrating weighing scales and balances to ensure consistent weighing performance and accuracy. Choose from our selection calibration test weights and weight sets ranging from 1g to 50kg with stainless steel, cast iron and brass variations available.

The different test weight options available can be confusing and you might well ask what the difference is between an M1 and an F1 weight, or why you might use one rather than the other. We have compiled a brief overview of the calibration weights we offer, and additional information on the importance and how to calibrate a balance with weights within our related articles below:  

M1 Class Test Weights: The most widely used test weight class on the market today. These weights are used to calibrate scales and balances where exact precision is not necessary. All class III scales use these weights for reference and calibration.

F1 Class Test Weights: Common weights used for standard precision balances and scales. These weights have a high degree of accuracy, but more cost effective than the E1 and E2 classes. Mainly used in laboratories, calibration houses and quality control areas.

E2 Class Test Weights: The most precise test weights available. These weights should be used on balances and scales with very fine resolutions, such as micro and analytical balances. Most commonly used in test and calibration houses and within the chemical and pharmaceutical industries.

Guide to Calibration Weights - Free PDF Download

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  1. OIML Calibration Weight Set | Inscale UK

    OIML Calibration Weight Sets

    Starting at £113.00

    OIML weight sets are a complete set of test weights that can meet the requirements for testing to OIML standards. E2 and F1 weights offer the highest accuracy required for analytical and precision balances, M1 weights offer the lowest accuracy but are more affordable and are ideal for compact balances and bench scales. Learn More
  2. OIML Approved Calibration Weights | Inscale UK

    OIML Calibration Weights

    Capacity Range:
    1g to 5000g

    Starting at £10.00

    Each OIML weight is an individual stainless steel weight that meet the requirements for testing to OIML standards. E2 weights offer the highest accuracy required for analytical and precision balances, M1 weights offer the lowest accuracy but are more affordable and are ideal for compact balances and bench scales. Learn More
  3. OIML Cast Iron Test Weights | Inscale UK

    OIML Cast Iron Weights

    Starting at £47.00

    Cast iron weights are available in OIML M1 class, they offer higher capacities to meet the needs to calibrate larger scales such as industrial platform and floor scales. Learn More
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