B-Series 130-250F Mechanical Temperature Murphygage 2 in. with 40 Ft Capillary - 20BTG-250-40-1/2 by Murphy


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0.41 LBS
Estimated Special Order Ship Date:
Special Order (ships approximately 2-3 Weeks)
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The 130-250F B-Series Mechanical Temperature Murphygage with 40 Ft Capillary 20BTG-250-40-1/2 is a high quality, diaphragm-actuated indicating gage. With the same heavy-duty design as the standard 20 series Swichgage, the B-gage is more compact and is the optimum instrument for gage-only applications. It has a high impact polycarbonate 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.

The temperature murphygage operates on the same mechanical principle as the pressure 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.



  • 2 in. (51 mm) Dial Gage
  • Plated Steel Case
  • Polished Stainless Steel Bezel
  • Polycarbonate, High-Impact Lens
  • Heavy-duty Rated
  • Environment Sealed
  • Applications: Industrial engines and equipment in Oil Field, Marine, Irrigation, Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil and Transmission Oil



  • Part No.: 20BTG-250-40-1/2
  • Range: 130-250°F - 60-121°C
  • Gage Accuracy: Range 130-250°F (54-121°C); Lower 1/3 Scale ± 9° (± 5°); Middle 1/3 ± 5° (± 2.4°); Upper 1/3 ± 4° (± 2°)
  • Adapter Nut: 1/2-14 NPT
  • Dial: White on black; U.S.A. standard scale is dual scale
  • Maximum Panel Thickness: 1/4 in. (6 mm)
  • Capillary Length: 40 ft
  • Port: Brass
  • Case: Plated steel; mounting clamp included (except for direct mount models)
  • Bezel: Polished stainless steel
  • Pointer: White (black dial)
  • Lens: Polycarbonate, high-impact
  • Sensing Element: Beryllium copper diaphragm
  • Dimensions: Please see image 2

Product Condition: NEW
B-Series 130-250F Mechanical Temperature Murphygage with 40 Ft Capillary 20BTG-250-40-1/2

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