• Murphy

B-Series Murphygage®

The B-Series Murphygage® instrument is a highquality, diaphragm-actuated indicating gage.

Built by Enovation Controls 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.

The B-Series can be utilized in industrial engines and equipment for oil and gas, marine, irrigation, construction and trucking industries as well as monitoring engine coolant, crankcase oil and transmission oil.

20BTG-250

  • CE (European Conformity) mark
Base Models Specifications Downloads How to Order
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Specifications Drawer: 
  • Dial: White on black; U.S.A. standard scale is dual scale; others available.
  • Gage Accuracy: See Technical Bulletin
  • Temperature Range:
    • Pressure/Vacuum:
      • Process: -40° to 250° F (-40° to 121° C)
      • Ambient: -40° to 150° F (-40° to 66° C)
    • Temperature: See Technical Bulletin
  • Maximum Panel Thickness: 1/4 in. (6 mm)
  • Port: Brass
  • Case: Plated steel; mounting clamp included (except for direct mount models)
  • Bezel: Polished stainless steel, standard; optional bezels are available.
  • Pointer: White (black dial); black (white dial)
  • Lens: Polycarbonate, high-impact
  • Sensing Element: Beryllium copper diaphragm

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to www.P65Warnings.ca.gov or visit our California Proposition 65 page.

Literature Drawer: 

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

All configurations may not be available. Call your sales representative or Enovation Controls for more information.

Each Murphygage instrument has a high impact polycarbonate lens, sturdy steel case and a polished, low-profile stainless steel bezel. Accuracy and protection from moderate over-pressure/overtemperature are assured by a unique, unitized diaphragm chamber, superior quality materials and the design of the gage movement.

Pressure Murphygage instrument
Pressure changes at the diaphragm convert to accurate mechanical movements that are indicated on an easy-toread 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.

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

Temperature Murphygage instrument
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 (specify). Optional bulb types, adaptor nuts and thermowells are available.