Murphy: 20T Series Mechanical Temperature Switch gauge
'Combination Indicating Gauge' and 'Limit Switch'
Critical/High Temperature Limit Switch Is Visible and Adjustable
Switch can activate alarms and/or shut down equipment
Contact 'grounds' through case
The 20 Series (2 inch/51 mm dial) Switch gauge models are diaphragm-actuated, temperature-indicating gauges, with built-in electrical switches for tripping alarms and/or shutdown devices.
The gauge mechanism is enclosed in a steel case coated to resist corrosion. A poly carbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument.
These vapor actuated gauges feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor, creating pressure against the diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gauge reading.
For series 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. Contact(s) are grounded through the Switch gauge case. They have self-cleaning motion to enhance electrical continuity.
Industrial engines and equipment in Oil Field, Marine, Irrigation, Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil, Transmission Oil.
Available in various length capillaries / in 2ft increments please call for more details.