Murphy 250F Mechanical Temperature Swichgage with 4 Ft Capillary - 20T-F-250-4-1/2

The Murphy 250F Mechanical Temperature Swichgage with 4 Ft Capillary 20T-F-250-4-1/2 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. Unit comes with FS stud for closed loop with 518 tattletale and 4 foot capillary length with a standard 1/2-14 NPT threading.

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.

FEATURES:

• 2 inch/51 mm dial
• FS contact (includes “ES” as appropriate)
• Combination Indicating Gage and Limit Switch
• Switch Can Activate Alarms and/or Shut Down Equipment
• Contact Grounds Through Case

PRODUCT SPECIFICATIONS:

• Part No.: 20T-F-250-4-1/2
• Range: 130-250°F (54-121°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
• 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)