Murphy 130-220F Direct Mount Temperature Swichgage 2 in. w/ Sensing Bulb and Plated Steel Case - 20SD-220-1/2

Product Condition: NEW
Murphy 130-220F Direct Mount Temperature Swichgage 1/2-14 NPT with Sensing Bulb 20SD-220-1/2
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The Murphy 130-220F Direct Mount Temperature Swichgage 2 inch 20SD-220-1/2 is a diaphragm-actuated, temperature-indicating gage with a built-in electrical switch for tripping alarms and/or shutdown devices. The gage 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. This Swichgage features 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 gage reading.

The gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are isolated through ground. This gage has a self-cleaning motion to enhance electrical continuity. This model has no capillary tube.



  • 2 inch/51 mm Dial
  • Polycarbonate, High-Impact Lens
  • Polished Stainless Steel Bezel
  • Contact Grounds Through Case
  • Combination Indicating Gage and Limit Switch
  • Switch Can Activate Alarms and/or Shut Down Equipment
  • Enclosed in a Steel Case Coated to Resist Corrosion
  • Includes 11/32 x 1-1/2 in. (9 x 38 mm) sensing bulb
  • Applications: Industrial engines and equipment in Oil Field, Marine, Irrigation Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil and Transmission Oil


  • Part No.: 20SD-220-1/2
  • Range: 130-220°F (54-104°C)
  • Dial: White on black; U.S.A. standard scale is dual scale °F/°C
  • Case: Plated steel
  • Bezel: Polished stainless steel
  • Pointer: Tempered nickel silver
  • Lens: Polycarbonate, high-impact
  • Sensing Element: Beryllium copper diaphragm
  • Sensing Bulb: Copper
  • Gage Accuracy: Temperature Range 130 to 220°F (54 to 104°C); Lower 1/3 of Scale ± 6°F (± 3°C); Middle 1/3 of Scale ± 3°F (± 1.6°C); Upper 1/3 of Scale ± 4°F (± 2°C)
  • Maximum Temperature: 260°F (127°C)
  • Standard Setting: 210°F (99°C)
  • Adapter Nut: 1/2-14 NPT
  • Adjustable Limit Contact: SPST contact; pilot duty only, 2 A @ 30 VAC/ VDC; Ground path through encasement. Normally Closed (NC) when the high limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver
  • Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale
  • Limit Contact Wire Leads: 18 AWG (1.0 mm2) x 12 in. (305 mm)
  • Unit Weight: 12.7 oz. (0.39 kg)
  • Unit Dimensions: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)

Additional Information

Product Condition NEW
upc No

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