1 milligram Class 1 calibration leaf weight (PWB7037-1W), Flat Weight, includes NVLAP Certificate of Calibration.  The leaf weight is traceable to National Institute of Standards and Technology (NIST) standards.  Individual weight is packed in a plastic vial and then in bubble envelope.  Typical lead time is 5 to 7 business days from the date order is placed to shipping from NVLAP metrology lab.


Single-piece construction: This weight contain no air cavity or foreign adjusting material, with one end turned up for easy handling, thus providing the maximum mass stability.  In addition, it is an ASTM requirement that one-piece weights are used as standards where mass stability is required.


This Class 1 Mass Standard provides the greatest precision we offer.  Ideal for use as reference standards to calibrate other weights or verify the calibration on high-resolution microbalances including the Mettler-Toledo MX5, Mettler Toledo UMX2, Scientech SM50, or A&D GH-252 semi micro balance. 


Weights not supplied with case. Case available upon request for an additional cost.

We offer a choice of 21, 17, 16, 9, 8 and 5 piece weight sets or individually weights ranging from 5kg to 1mg.  See the complete offering of calibration weights here.