- SKU:
- 77209432
- Weight:
- 0.91 LBS
- so_moq:
- 1
- so_qi:
- 1
- NA:
- NA
- Special Order Available:
- Increments of 1
- QPO:
- 0
- MPN:
- 10751356
The Murphy Temperature Swichgage A20TABS-250-20-1/2 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.
The A20TABS-250-20-1/2 features a standard limit contact for equipment shutdown on high temperature. It also has an internal SPDT snap-switch to signal an alarm before shutting down. 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 A20 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 inch/51 mm dial
- Internal SPDT snapswitch for pre-alarm
- Corrosion Resistant Polycarbonate Case
- Indicating Gage and Limit Switch
- Switch Can Activate Alarms and/or Shut Down Equipment
- Contact(s) Isolated From Ground
PRODUCT SPECIFICATIONS:
- Part No.: A20TABS-250-20-1/2
- Range: 130 – 250°F (54 – 121°C)
- Gage Accuracy: Temperature Range 130 to 250°F (54 to 121°C); 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 Settings: 210°F (99°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; 20 ft
- Adjustable Limit Contact: SPST contact; pilot-duty only, 2 A @ 30 VAC/ VDC; isolated from case ground. Normally Closed when the high limit is met. Normally Open 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
- Wiring: Number 4 screw terminals
- Unit Weight: 11.9 oz. (0.370 kg)
- Unit Dimensions: 4-3/4 x 4-3/4 x 3 in. (121 x 121 x 76 mm)
Product Condition: NEW
