Description
The Johnson Controls A19AUC-2 is a heavy-duty mechanical temperature controller engineered for hazardous location applications where explosion-proof performance is non-negotiable. Featuring a remote sensing bulb design with a 6-foot capillary, this unit delivers reliable, precise temperature switching across a broad voltage range — making it an ideal solution for industrial HVAC, refrigeration, and process control environments.
Key Features
- Explosion-proof, hazardous location rated construction for use in volatile or flammable environments
- Wide operating voltage range: 24 to 277Vac for versatile system compatibility
- SPDT (Single-Pole, Double-Throw) switching action for flexible control wiring configurations
- Automatic reset operation — no manual intervention required after setpoint recovery
- Setpoint range of 20°F to 80°F for low-to-medium temperature control applications
- Fixed differential of 3.5°F for consistent, stable switching performance
- 6-foot capillary length for remote sensing flexibility and installation versatility
- 3/8″ x 4-1/16″ sensing bulb for accurate, responsive temperature detection
- Mechanical (non-electronic) design for robust, long-term reliability in demanding environments
Specifications
- SKU: A19AUC-2
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Controller
- Voltage: 24 to 277Vac
- Switch Action: SPDT
- Reset Type: Automatic
- Setpoint Range: 20°F to 80°F
- Fixed Differential: 3.5°F
- Capillary Length: 6 feet
- Sensing Bulb Size: 3/8″ x 4-1/16″
- Application Rating: Hazardous Location / Explosion Proof
Application
The A19AUC-2 is designed for use in classified hazardous locations where ignitable gases, vapors, or dusts may be present. Its explosion-proof enclosure and remote bulb sensing make it well-suited for industrial refrigeration, cold storage, petrochemical facilities, and other demanding environments requiring dependable mechanical temperature control with a wide voltage tolerance.
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