SS Case Gas Filled Temperature Gauge(ST)
The ST Model themo consist of the stem,capillary and bourdon tube in a case. These part are connected to form a unit. The complete measuring system is filled with an inert gas as standard or mercury as an option under pressure. Atemperature change cause the internal pressure in the stem to change. The deflection of the bourdon tube thus caused is transmitted to the pointer by a movement.A bimetallic element is fitted in between the moment and bourdon tube to compensate for fluctuations of ambient temprature at the case.