Murphy 2 in. Illuminated Temperature Swichgage 130F-250F with 25 ft. PVC-Armored Capillary with 1-2-14 NPT Adapter Nut - 20T-I-250-25-1/2

The Murphy Temperature Swichgage 20T-I-250-25-1/2 is a diaphragm-actuated, temperature-indicating gage with built-in electrical switches for tripping alarms and/or shut-down devices. The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, breakresistant 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 is grounded through the Swichgage case. It has a self-cleaning motion to enhance electrical continuity. This instrument is used on industrial engines and equipment in oil field, marine, irrigation, construction and trucking industries and for monitoring engine coolant, crankcase oil and transmission oil.

PRODUCT FEATURES:

• 2 inch/51 mm dial
• Gage pointer makes with an adjustable contact to complete a pilot-duty circuit
• Compliance with EMC Council directive 89/336/EEC regarding electromagnetic compatibility as noted

PRODUCT SPECIFICATIONS:

• Murphy Part No.: 20T-I-250-25-1/2
• Series: 20 Series
• Base Model: 20T
• Options: Illumination
• Range: 130°F - 250°F (60°C - 121°C)
• Capillary: PVC armored copper; 25 ft.
• 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
• Bezel: Polished stainless steel, standard
• Pointer: Tempered nickel silver
• Lens: Polycarbonate, high-impact
• Sensing Element: Beryllium copper diaphragm
• Sensing Bulb: Copper
• Gage Accuracy:

• Lower 1/3 of Scale: ± 9°F (± 5°C)
• Middle 1/3 of Scale: ± 5°F (± 2.4°C) 
• Upper 1/3 of Scale: ± 4°F (± 2°C)

• Maximum Temperature: 310°F (154°C)
• Standard Setting: 210°F (99°C)
• Maximum Ambient Temperature: -40°F (-40°C) through 150°F (66°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 through 100% of the scale 
• Limit Contact Wire Leads: 18 AWG (1.0 mm) 2 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)