How do I read a pressure gauge like this?
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How to read a dual-pointer differential pressure gauge?
Looking at this watch of yours, the outer dial shows pressure; both the red and black hands can be used for reading values. The outer dial, on the other hand, indicates the pressure difference – pay attention to the positive and negative values~~
The angle between the two needles is the pressure difference~~I forgot to mention that~~ hehe~~
As can be seen from the table, the value shown in the middle is the pressure difference, while the black value on the outside represents the pressure (operating pressure).
It seems that the pressure unit displayed on the outer ring is Mpa； The pressure unit displayed on the inner ring (red pointer) is Pa, which is 1/10 of the unit on the inner ring. Final reading (Mpa) = Mpa value displayed on the outer ring + value displayed on the inner ring (with positive or negative sign) * 0.1. With the inner ring reading, the displayed value can be accurate to the tenth place. It’s best to confirm from the instructions. ......Freed steam energy saving.
The black pointer rotates the small dial, while the large dial shows the two actual pressures; the red pointer indicates the pressure difference on the small dial.
“The pressure unit displayed on the inner ring (red pointer) is Pa, which is 1/10 of the unit on the inner ring. ” Sorry, that was a mistake earlier – I mistook Pa for Bar; ignore the previous statement. Sorry!