The precision of the pressure gauge is how rules?

Pressure gauge refers to elastic element as the sensitive element, measure and instructions above environmental pressure meter, application is very common, it almost throughout all of the industrial process and research fields. In the heat pipe network, oil and gas transmission, water supply, gas supply system, vehicle maintenance shop, etc can be seen everywhere. Especially in the process of industrial process control and technology measure, due to the flexibility of mechanical pressure gauge sensor has high mechanical strength and production is convenient wait for a characteristic, make the mechanical pressure gauge is widely used. Different application scenarios is different to the requirement of the precision of the pressure gauge, today we are here to discuss the accuracy of pressure gauge how the rules. Precision grade of pressure gauge, is the permissible error of pressure gauge range to represent the percentage of, general component is zero. 5, 1, 1. 5, 2, 2. 5, 3, 4 seven ( On the boiler without level 3 and level 4) , the smaller the value, the higher accuracy. For example, the dial range 0 ~ 2. 2 5 mpa precision. Level 5 of the pressure gauge, pressure value shown in its pointer with the actual measured medium pressure value between the margin of error, shall not exceed 2. 5MPa× 2. 5% = ± 0. 062 5MPa； When the pressure gauge indicating pressure to zero. 8 mpa, the actual pressure at 0. 7375-0. 8625 mpa. Thus, pressure gauge the size of the actual error, not only related to the accuracy, but also associated with the size range of pressure gauge. Range at the same time, the higher precision ( The smaller the number) The smaller, and allowed error of pressure gauge. Precision of phase at the same time, the greater the range, the greater the error of pressure gauge.