Pressure, Vacuum and Temperature Instruments
Pressure, Vacuum and Temperature Instruments


  • 2 in. (51 mm) Dial Gages
  • Heavy-duty rated
  • Environmentally sealed
  • Pressure models up to 400 psi (2.76 MPa) [27.6 bar]
  • Temperature models up to 440°F (220°C) 



The B-Series Murphygage® instrument is a high quality, diaphragm-actuated indicating gage. Built by Murphy with the same heavy-duty design as the standard 20 series and 25 series Swichgage® instrument, the B-gage is more compact and is the optimum instrument for gage-only applications. It has a high impact polycarbon- ate lens, sturdy steel case, and a polished, low-profile stainless steel bezel. Accuracy and protection from moderate over-pressure/over-temperature are assured by a unique, unitized diaphragm chamber, superior quality materials, and the design of the gage movement.



Pressure changes at the diaphragm convert to accurate mechanical movements that are indicated on an easy to read analog dial. A pulsation dampener in the pressure port helps eliminate pointer flutter; it can be removed for cleaning to maintain the gage’s response and accuracy.



Available in 0 to 20 or 0 to 30 in. Hg. (0 to -68 or 0 to - 102 kPa) vacuum.



As temperature rises, the fluid in the sensing bulb vaporizes to apply pressure on the diaphragm; the movement translates this vapor pressure to a calibrated reading of temperature on the dial. The standard capillary is copper with a PVC armor. Optional armor covering is galvanized steel or 316 stainless steel. Optional bulb types, adaptor nuts and Thermowells are available.



Industrial engines and equipment in Oil Field, Marine, Irrigation, Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil, Transmission Oil. 

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