Rotary Gauges

For NH3 & LPG

These units give visual indication of the amount of NH3 / LPG in the tank and are also used in filling the tank to the correct liquid level.

The liquid level is determined by opening a small bleed orifice when the tube is in the vapor space of the tank. Moving the pointer causes the tube to move until it contacts liquid and discharge from the orifice turns from vapor to liquid.
For 1200 Gal. & Less, Order Dial STJ31S-1 & Specify NH3 or LPG Service.