Murakami Koki Sub-milligram weights (with JCSS calibration)

The minimum mass of weights specified in the international recommendation for weights, OIML R111-1:2004, and the domestic standard, JIS B7609:2008, is 1 mg.
Many electronic balances used in laboratories and on production lines have a measurement capacity of less than 1 mg. The performance of electronic balances is generally managed by using standard weights that correspond to the measurement range. However, the current problem is that it is not possible to directly manage the mass range of less than 1 mg, i.e., the sub-milligram range.
Looking ahead to the future of standards, Murakami Scale Manufacturing Co., Ltd. has created a mass standard of less than 1 mg using titanium. (In May 2017, the National Institute of Technology and Evaluation (NITE) revised its technical guidelines, making it possible to perform JCSS calibration in the sub-milligram range, and in December of the same year, Murakami Scale Manufacturing Co., Ltd. became the first registered business in Japan in this range (0.5 mg to 0.1 mg).)

Resin case

*Expanded uncertainty (mg): ±0.00067*Maximum permissible error (mg): ±0.003