Calibration Certificate for BHY-250 Piston Pressure Gauge Produced by Taihang in 2025

The measuring instrument involved in the certificate is a piston pressure gauge manufactured by Taihang, with the model specification BHY-250, factory number N0810, and its measuring range is (5~250) MPa. The verification was carried out in accordance with JJG59-2022 "Liquid Piston Pressure Gauge". The verification conclusion is that the piston pressure gauge is permitted to be used as a 0.02-class standard. The verification date is March 24, 2025, and the validity period is until March 23, 2027.