• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.
Sight Glass Oil & Gas - Energy

A sight glass or water gauge is a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within.

Simple sight glasses may be just a plastic or glass tube connected to the bottom of the tank at one end and the top of the tank at the other. The level of liquid in the sight glass will be the same as the level of liquid in the tank. Today, however, sophisticated switches have replaced sight glasses in many such applications.