Murphy 140-300F Temperature Swichgage 2 in. w/ 4 Ft Capillary and Plated Steel Case - 20T-300-4-1/2

The Murphy 140-300F Mechanical Temperature Swichgage 2" with 4 Ft Capillary 20T-300-4-1/2 is a diaphragm-actuated, temperature-indicating gage with 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 vapor actuated gage features 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 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. Contact(s) are grounded through the Swichgage case. This gage has a self-cleaning motion to enhance electrical continuity. Applications: Industrial engines and equipment in Oil Field, Marine, Irrigation Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil and Transmission Oil.

FEATURES:

• 2 inch/51 mm Dial
• Steel Case Coated to Resist Corrosion
• Polycarbonate, High-Impact Lens
• Polished Stainless Steel Bezel
• Combination Indicating Gage and Limit Switch
• Switch Can Activate Alarms and/or Shut Down Equipment
• Contact Grounds Through Case

PRODUCT SPECIFICATIONS:

• Part No.: 20T-300-4-1/2
  
• Range: 140-300°F (60-149°C)
• Adapter Nut: 1/2-14 NPT
  
• Dial: White on black; U.S.A. standard scale is dual scale °F/°C
• Case: Plated steel; mounting clamp included (except for direct mounting models)
• Bezel: Polished stainless steel
• Pointer: Tempered nickel silver
• Lens: Polycarbonate, high-impact
• Sensing Element: Beryllium copper diaphragm
• Capillary: PVC armored copper; 4 ft
• Sensing Bulb: Copper
• Gage Accuracy: 140 to 300°F (60 to 149°C) Temperature Range; ± 10°F (± 5.2°C) Lower 1/3 of Scale; ± 6°F (± 3°C) Middle 1/3 of Scale; ± 5°F (± 2.4°C) Upper 1/3 of Scale
• Maximum Temperature: 340°F (172°C)
• 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)