In addition to the basic error allowed, precision pressure gauges of different accuracy levels also have differences in reading resolution. For example, the national standard for precision pressure gauges in China stipulates that a precision pressure gauge with grade 0.4 and 1.6MPa has a dial scale of 160 divisions, and a precision pressure gauge of grade 0.25 with 1.6MPa has a dial scale of 320 divisions. Obviously, the sealed dial scale must have high reading accuracy, which can reduce the reading error of the precision pressure gauge.
The measurement system of the pointer pressure gauge is composed of a joint and a spring tube. The free end of the spring tube is displaced due to the change of the measured pressure. The corresponding pressure value is indicated on the dial. The pointer pressure gauge is suitable for measuring the pressure of liquid, gas and steam and other media that have no explosion hazard, do not crystallize and solidify, and do not corrode copper alloys.
In order to ensure the reading accuracy of the precision digital pressure gauge, the dial of the precision digital pressure gauge is equipped with a mirror ring to improve the reading accuracy to correct the reading position and improve the reading accuracy of the precision digital pressure gauge.
In China's national standard for precision digital pressure gauges, it is also specified that the scale line is a full-thin line of no more than 0.2mm, and the ratio of long and short lines is 2:1. When choosing a precision pressure gauge, do not ignore the resolution of the precision pressure gauge, stainless steel diaphragm pressure gauge, weigh and optimize the precision pressure gauge you need.
Precision digital pressure gauges are widely used in electric power, metallurgy, petroleum, chemical industry, measurement system industry laboratory and field for measurement and scientific research. It can provide measurement for calibration pressure (differential pressure) transmitters, stainless steel membrane pressure gauges, precision pressure gauges, ordinary pressure gauges, sphygmomanometers, pressure reducing valves and other instruments. Single-range single-function precision digital pressure gauge can replace the original precision pointer pressure gauge.
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