The Murphy 180-350F Mechanical Temperature Swichgage Field Adjustable 2.5" with 25 Ft Capillary and Snap-Acting Switch A25TEF-350-25-1/2 is a diaphragm-actuated, temperature-indicating gage with built-in electrical switch for tripping alarms and/or shutdown devices. This rugged, built-to-last instrument is fully sealed from the environment by the unique combination of a polycarbonate case and lens, a polished stainless steel bezel, and O-ring seals. This vapor actuated gauge 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 a diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading. This A25TEF-350-25-1/2 also features an internal SPDT snap-switch, instead of the single pole/pointer contact(s). When the switch closes on rising temperature, it becomes Set. As temperature decreases the switch Resets.

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 isolated from ground. They have self-cleaning motion to enhance electrical continuity. Applications for A25 series temperature swichgage instruments include: engines and equipment in oil field, marine, irrigation, construction and trucking industries. Monitoring engine coolant temperature, crankcase oil and transmission oil.

FEATURES:

• 2-1/2 inch/64 mm dial
• O-ring Seals
• Polished Stainless Steel Bezel
• Corrosion Resistant Polycarbonate Case
• Indicating Gage and Limit Switch
• Switch Can Activate Alarms and/or Shut Down Equipment
• Contact(s) Isolated From Ground
• Internal Snap-Acting SPDT Switch
• F = Field Adjustable
  

PRODUCT SPECIFICATIONS:

• Part No.: A25TEF-350-25-1/2
  
• Range: 180 – 350°F (82 – 177°C)
  
• Adapter Nut: 1/2-14 NPT
• Dial: White on black
• Case: Glass filled/Polycarbonate, corrosion-resistant; steel mounting clamp included
• Bezel: Polished stainless steel
• Pointer: Tempered nickel silver; red tip
• Lens: Polycarbonate, high-impact.
• Sensing Element: Beryllium copper diaphragm
• Sensing Bulb: Copper
• Capillary: PVC armored copper; 25 ft.
• Sensing Bulb: Copper
• Gage Accuracy: Temperature Range 180 to 350°F (82 to 177°C); Lower 1/3 of Scale ± 12°F (± 6°C); Middle 1/3 of Scale ± 5°F (± 2.4°C); Upper 1/3 of Scale ± 5°F (± 2.4°C)
  
• Maximum Temperature: 400°F (209°C)
  
• Standard Settings: 330°F (166°C)
  
• Snap-Switch Rating: SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive
• Wiring: Number 6 screw terminals
  
• Unit Weight: 13.3 oz. (0.413 kg)
  
• Unit Dimensions: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)