05 Liquid Level Indicators

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Rotary Gauges

Fisher brand rotary gauges can be used on stationary or mobile tanks to visually indicate the amount of LPG, NH3 and NGL in the container. They are also used in filling the tank to the proper liquid level. On mobile applications and some large stationary storage tanks, hangers are recommended to support the horizontal length of the dip tube.

The gauge is operated by opening the small bleed orifice when the tube is in the vapor space of the tank. Moving the pointer on the dial causes the end of the tube to move until it contacts liquid in the container. At this point, discharge from the bleed orifice turns from vapor to liquid and the rotary gauge dial gives the volume percentage of liquid in the tank.

J31 Series – Consists of heavy duty gauges that minimize vibration effects (swaying and bouncing) by a long (68 in. / 1.73 m) stem tube extension. Gauges fit 1 in. / 25.4 mm coupling container connections.

All gauges have stem and dip tubes with an extra large inside diameter. This assures that the correct liquid level can be obtained quickly.

A Nylon (PA) packing sleeve and a friction ring for the pointer indicator gives smooth rotation and long service life. Steel and stainless steel materials resist rust or corrosion. Standard product temperature rating is -20 to 160F / -29 to 71C.