Buying Scale Calibration Weights - What you should know

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Scale Calibration Weights - Have you found a bargain?

Have you ever wondered why when looking to purchase scale calibration weights to check the accuracy of your scales & weighing equipment, there is often a substantial difference in price. Is it down to the material of the calibration weight or one seller just charging a lot more than the other? The scale calibration weights may all look the same but are they accurate, probably not.


If you are looking to purchase scale calibration weights to test the accuracy of your scale then this guide is for you. First of all though, let us look at 2 scenario's.


1) You thought that your scales needed checking for accuracy so you purchased and received your calibration weight through the post, placed it on your scales and the weight display shows that they are accurate.


2) You thought that your scales needed checking for accuracy so you purchased and received your calibration weight through the post, placed it on your scales and the weight display shows that they require re-calibrating. After re-calibrating, they are now showing a correct reading.


Both scenario's now say that your scales are giving correct readings but in fact, your scales could be as inaccurate or worse than before so if you thought you had got a bargain with your purchase, then you would have been better off saving your money and checking your scales with a can of tinned beans from the supermarket.


So how do you know which scale calibration weights to purchase? Well firstly, think about why you want them, accuracy, right?


The most important thing to remember is that calibration weights will only be accurate if they have been manufactured to tolerance for the country that they have been intended to be used and then they are used in that country.

For example, weights manufactured in and for China will only be accurate in that country. If they are intended for use elsewhere then the correct adjustments to the weights must have been made.


With the above in mind, if you are purchasing scale calibration weights for use here in the UK, then always ensure the the calibration weights have been manufactured and tested accordingly. If possible, ask for that to be confirmed on the paperwork or with an attached certificate for traceability and if in doubt, ask.

Our OIML Precision Calibration Weights are manufactured to the tolerances as set forth by the Organisation Internationale de Metrologie Legale International Recommendation and are available in classes E2, F1, M1 and M2.

Weights adjusted to OIML Class E2/M3/M1/F1 can be used as a reference standard in calibrating other weights and is appropriate for calibrating high precision analytical balances with a readability as low as 0.1 mg to 0.01 mg.

Our Stainless Steel OIML Calibration Weights meets OIML adjustment tolerances and is ideal for applications requiring a high degree of accuracy as when calibrating other weights or high precision balances.

We also provide weights adjusted to OIML Class M3. These are economical weights used for general laboratory, industrial, commercial, technical and educational applications. 

These types of weights can be made of cast iron, or brass.

If you would like any advice prior to any purchase of scale calibration weights then please get in touch and we will be more than happy to help.

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