Can stainless steel pressure gauge be used to measure liquid ammonia?

If it comes into contact with liquid ammonia, a stainless steel pressure gauge can be used, and the pressure measuring spring tube is also stainless steel.

However, according to the regulations, a special ammonia pressure gauge must be used to measure the pressure of ammonia, because ordinary pressure gauges use brass as the measuring material, and liquid ammonia will react chemically or even explode when it meets copper or copper alloy.

Therefore, it is generally necessary to use ammonia pressure gauge to measure liquid ammonia, and a yellow horizontal line mark must be drawn below the product name on the product dial as a warning!

(Article 7 of GB/T9272- 1999.1.2)