Description
The Johnson Controls A19DAF-2 is a mechanical, strap-on surface-mounted temperature control engineered for reliable high-temperature sensing and switching in HVAC and hydronic systems. Designed to clamp directly onto pipes or surfaces, it eliminates the need for immersion wells while delivering accurate, repeatable performance across a demanding temperature range.
Key Features
- Setpoint range of 200°F to 240°F — ideal for high-temperature pipe and surface monitoring
- SPDT (Single-Pole, Double-Throw) switching action for versatile control circuit integration
- Automatic reset operation — restores normal control once temperature returns within range
- Fixed differential of 3.5°F for precise, consistent switching performance
- Compatible with 120VAC to 240VAC systems for broad electrical compatibility
- Strap-on, surface-mounted design for quick, tool-friendly installation on pipes or equipment surfaces
- Concealed range adjustment for tamper-resistant setpoint control
- Mechanical (non-electronic) operation for proven durability in demanding environments
Specifications
- SKU: A19DAF-2
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Control
- Voltage: 120VAC – 240VAC
- Switch Action: SPDT (Single-Pole, Double-Throw)
- Reset Type: Automatic
- Setpoint Range: 200°F to 240°F
- Fixed Differential: 3.5°F
- Mounting Style: Strap-On, Surface Mounted
- Range Adjustment: Concealed
Applications
- High-temperature pipe monitoring in boiler and hydronic systems
- Hot water supply and return line control
- HVAC equipment protection and limit control
- Industrial and commercial temperature switching applications
The A19DAF-2 is a dependable choice for contractors and engineers who need a straightforward, mechanical temperature control solution with a high-range setpoint and broad voltage compatibility. Its strap-on design speeds up installation and reduces labor costs, while the concealed adjustment helps maintain calibrated setpoints in the field.
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