The lowest accuracy grade of the pressure gauge is 4.
The pressure gauges for general industrial use in China are divided into four accuracy grades, which are in line with the allowable errors of the pressure gauges stipulated in the verification regulation JJG52-1999 "General Pressure Gauges with Spring tubes, Pressure and Vacuum Gauges and Vacuum Gauges".
The four accuracy levels are: level 1, level 1.6, level 2.5 and level 4. The allowable errors (as a percentage of the upper limit of measurement) are ±1 percent , ±1.6 percent , ±2.5 percent , ±4 percent , respectively.
Additional information:
Upper limit of pressure gauge:
The size of the upper limit of the pressure gauge is designed according to the size, stiffness and nonlinear conditions of the spring tube. The upper limit of the measurement is 1 10N, 1.6 10N, 2.5 10N, 4 10N, 6 10N five series, n is a positive integer, negative integer or zero.
