The 20T Series (2 inch/51 mm dial) Switchgauge model is diaphragm-actuated,
temperature-indicating gauge, with built-in electrical switches for tripping alarms and/or
These vapour actuated gauges feature a sealed capillary tube and a sensing bulb. When
subjected to heat, the liquid in the sensing bulb changes to vapour creating pressure
against the diaphragm mechanism. The diaphragm translates this vapour pressure into a
mechanical gauge reading.
The gauge pointer acts as a temperature indicator and as one switch pole which
completes a circuit when it touches the adjustable limit contact. Contacts are grounded
through the Swichgauge case. They have self-cleaning motion to enhance electrical
The gauge mechanism is enclosed in a steel case coated to resist corrosion. A
polycarbonate, break-resistant lens and a polished stainless steel bezel help protect this
rugged, built-to-last instrument.
Ranges are available from 32-120°F (0-45C) thru 300-440F (160-220C).
Ratio Switch Settings