As you can see from the picture above, the unit of this pressure gauge is MPa, the maximum range is 2.5MPa, and the minimum range is 0MPa, so the full range is 0~2.5MPa. Pressure Gauge< The scales of /a> are equally marked. It can be seen that the pressure gauge is evenly divided into 0.5, 1, 1.5, and 2.5 for easy reading. Each large scale between the equal numbers is 0.1MPa, and the small scale is 0.05. MPa.
For example, the pressure at the yellow line in the picture above is 1.1MPa. The yellow line is after the mark "1" and on a large scale, so the final reading is "1" + 0.1 = 1.1MPa.
"1.6" in the blue circle in the above picture means the accuracy is 1.6, which means the allowable error of this pressure gauge shall not exceed 2.5MPa×1.6%=±0.04 MPa.
In addition to the single-scale pressure gauge in the above picture, there is also a double-scale pressure gauge, as shown below:
As can be seen in the picture above, the pressure gauge has two scales. The black scale corresponds to the black unit (ie MPa), and the range is 0~40MPa;the red scale corresponds to the red unit (psi), the range is 0~5800psi.
By conversion we get 40MPa=5801.5097559psi. From this we can see that whether it is a black logo or a red logo, the total range is actually the same, but the units are different. , so the numbers on the label are also different. This double-scale pressure gauge is for workers with different habits to easily read the data.
Of course there are other typesPressure gauge, the two introduced here are the two most commonly used reading methods of pressure gauges. In addition, for the selection of pressure gauges: normal operation The pressure value should be between 1/3 and 2/3 of the upper limit of the instrument's measuring range.
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