please treat carefully it is a precision instrument.brPlease do not use it for other than tap water discharge pressure test. Please be careful to not to apply the best memory pressure to test gauge. Gradually open and close the valve cock, please avoid rapid pressure.
I bought it from other shops, but this product did not measure the correct water pressure. I always display the same water pressure regardless of actual water pressure. I had you exchange it for a new one, but the result was the same. If there are two such items in succession, even if the hydraulic pressure was successfully displayed even if it is the third one, I canceled it because it is doubtful whether it is a reliable numerical value or not.
Valve opening / closing of this product is digital and fully opened or fully closed. Even if the knob is turned slightly, the valve does not move, and suddenly it is fully opened or fully closed after passing a certain point. Behavior which is not so good for the meter due to sudden change.