Calibration Weights

Calibration Weights

Calibration Weights

Calibration Weights as per OIML R 111-1 Edition 2004(4) Type 1 are certified to be used to ensure that scales or balances are giving you accurate readings. Calibration weights are assigned a class which is based on the accuracy or tolerance of the weight. We are Leading Exporter of Calibration Weights from India. We Export Calibration Weights in Australia, Bahrain, Belgium, Botswana, Canada, Cyprus, Eswatini, France, Germany, Ghana, Ireland, Israel, Kenya, Kuwait, Malta, Malawi, Mauritius, Mozambique, Namibia, New Zealand, Netherland, Oman, Romania, Saudi Arabia, Singapore, South Africa, Tanzania, Thailand, Taiwan, United Arab Emirates, United Kingdom and USA.

OIML: The Organisation Internationale de Métrologie Légale or International Organization of Legal Metrology (OIML) is an intergovernmental organization that provides standards and systems with the goal of harmonizing legal metrology procedures. From lowest (most accurate) to highest tolerance, OIML has classified the Calibration Weights in accuracy classes as E1, E2, F1, F2, M1, M2, and M3.

Calibration Weights
Calibration Weights

Tolerance Levels

The following tables shows the tolerance levels for the different classes of weights, as per OIML.:

5000 kg  25000800002500008000002500000
2000 kg  10000300001000003000001000000
1000 kg 160050001600050000160000500000
500 kg 800250080002500080000250000
200 kg 300100030001000030000100000
100 kg 160500160050001600050000
50 kg25802508002500800025000
20 kg10301003001000300010000
10 kg5165016050016005000
5 kg2.58.025802508002500
2 kg1310301003001000
1 kg0.51.651650160500
500 g0.
200 g0.10.31.031030100
100 g0.
50 g0.
20 g0.0250.
10 g0.0200.
5 g0.0160.
2 g0.0120.
1 g0.0100.
500 mg0.0080.0250. 
200 mg0.0060.0200. 
100 mg0.0050.0160. 
50 mg0.0040.0120.040.120.4  
20 mg0.0030.0100.0300.100.30  
10 mg0.0030.0080.0250.080.25  
5 mg0.0030.0060.0200.060.20  
2 mg0.0030.0060.0200.060.20  
1 mg0.0030.0060.0200.060.20  

Certifications of Weights

While browsing Calibration Weights, you might come across mentions of certifications. Indeed, depending on your application, you may require that your calibration weights come with a certificate confirming that the lab testing the weights is accredited.

ISO/IEC 17025: The International Organization for Standardization (ISO) is an independent non-governmental organization comprising a membership of 164 national standards bodies. The International Electrochemical Commission (IEC) is an international standards organization for electrotechnical fields. Together with other liaison organizations, they created the ISO/IEC 17025 standards. This is the international reference to be used by testing and calibration laboratories that want to display their ability to provide reliable results.

as per

Calibration Weights
Calibration Weights
Calibration Weights

Calibration Weights

To ensure the accurate performance of your weighing scales or balances, it is essential to regularly assess them using calibrated weights. The frequency of these checks—whether daily, weekly, or monthly—depends on the criticality of the measurements to your product or process and the potential consequences of any deviation from tolerance in your weighing equipment.

Cast Iron Bar and Hex Calibration Weights: These weights are the most frequently used for testing industrial, commercial, and retail scales. They are typically adjusted to the M1 tolerance or class, which translates to an accuracy of 1:20,000 or 0.005%. For instance, a 20 kg (20,000g) calibration weight with M1 accuracy will have a maximum error, as supplied, of +/-1g. Please refer to the Weight Classes section for more details.

Cast iron bar and hex calibration weights are designed for single-person handling. The smaller weights, such as 5 kg, 10 kg, 20 kg, and 25 kg, are referred to as bar weights due to the handlebar, while those ranging from 100g to 2 kg have a hexagonal shape. We recommend M1 cast iron calibration weights for checking and calibrating scales with a resolution (readability) of 1g or more. They offer stability in dry environments and are a cost-effective choice compared to other options.

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You May Find Our Weights In: Canada . Namibia . Mozambique . Libya . Tanzania . Qatar . U.S.A. . Mauritius . Jordan . Sweden .Kuwait . Switzerland . Malaysia . France . Germany . Netherlands . New Zealand . Romania . Belgium . Australia . U.K. . Singapore . South Africa . Ireland . Israel . Cyprus . Nepal . Bahrain . Oman . Dubai . Philippines . Fiji . Saudi Arabia . Seychelles . Ghana . India . Swaziland . Thailand . Kenya . Malawi.