Murphy Temperature Switchgauge 20T
The 20 Series (2 inch/51 mm dial) Swichgauge model is a diaphragm actuated, temperature-indicating gauge with built-in electrical switches for tripping alarms and/or shut-down devices. They work on the same principal as the pressure switchgauges and can be used to monitor and control water/oil temperature. Operating from 40-120 degrees Celsius.
For the Murphy Temperature Switchgauge 20T, 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.
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. These vapour-actuated gauge features 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.
These instruments are used on industrial engines and equipment in oil field, marine, irrigation, construction and trucking industries and for monitoring engine coolant, crankcase oil and transmission oil.
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