All UKAS Slotted Weights are calibrated here at JWS to the specification listed below:
Our 50 Newton UKAS M1 is +/- 2.5mN.
UKAS Test Weights are sent to Trading Standard to be tested and Certificated.
They must have a Serial Number or some kind of identifying mark on each weight. This number can be stenciled or stamped onto the weight.
Only one UKAS Certificate is needed per batch of weights on the same order. Please remember to add this to your basket available back on the Test Weights page.
50 Newton UKAS Accredited Slotted Weight