Cahn, Sartorius, or Mettler micro balance owner's we have milligram leaf weights to test your micro balances to determine the accuracy of the micro and ultra-micro balances.

Certificate of Calibration and is traceable to National Institute of Standards and Technology (NIST) standards is included with this 500 milligram Ulti Mass Class U calibration leaf weight (WT500MGCLSUC), Flat Weight, ASTM Shape.  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 located Arvata, Colorado.

Single-piece construction: Because the precise measurement of density can only be achieved using a single piece weight, all Sartorius weights are ASTM Type 1 single-piece weights.  This weight contain no air cavity or foreign adjusting material, thus providing the maximum mass stability.  In addition, it is an ASTM requirement that one-piece weights are used as standards and where mass stability is required.

This Ulti Mass Class U Mass Standard provide the greatest precision we offer.  Ideal for use as reference standards to calibrate other weights.  Ideal for use as reference standards for use with the Sartorius MC21S micro balance, Cahn Micro-balance model C-33, Mettler Toledo UMX2 MicroBalance, Sartorius ME5 micro balance, CAHN C-34 Microbalance, Sartorius SE2 micro-balance, Sartorius CP2P micro balance or Mettler AX26 Micro Balance to name a few micro balances.

The mass standards produced by Sartorius today are designed to meet or exceed the standards of the American Society of Testing Materials (ASTM E617)

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.

Sartorius 500mg Calibration Wgt