Description
The Johnson Controls T-3610-1001 is a pneumatic low limit thermostat engineered for reliable duct-mounted freeze protection and air-handling applications. Featuring an 8-foot averaging element, this thermostat continuously samples air temperature across the full width of a duct or air handler to detect cold spots before freeze damage can occur. Its proportional, direct-acting control action delivers smooth, responsive pneumatic output without the hunting or overshoot associated with two-position controls.
Key Features
- 8-foot averaging element for comprehensive duct cross-section temperature sensing
- Duct mounting bracket included for fast, secure installation
- Proportional, direct-acting pneumatic control action
- Element operating range: 0 to 270°F for broad application flexibility
- Sensitivity (throttling) range: 0.25 to 0.75 PSI for precise control tuning
- 1/8″ NPT barbed fitting compatible with 5/32″ or 1/4″ OD pneumatic tubing
- Designed for low limit freeze-stat duty in air handling units and duct systems
Application
The T-3610-1001 is ideal for commercial and industrial HVAC systems where freeze protection of coils, air handlers, and ductwork is critical. The long averaging element ensures that localized cold spots — common in large duct cross-sections — are detected quickly, triggering the pneumatic control circuit to protect equipment and maintain occupant comfort.
Pneumatic Connection
- Port size: 1/8″ NPT with barbed fitting
- Compatible tubing: 5/32″ or 1/4″ OD pneumatic tubing
Specifications
- Model: T-3610-1001
- Brand: Johnson Controls
- Control Type: Pneumatic, Proportional Direct Acting
- Element Length: 8 feet (averaging type)
- Element Operating Range: 0°F to 270°F
- Sensitivity Range: 0.25 to 0.75 PSI
- Connection: 1/8″ NPT barbed fitting for 5/32″ or 1/4″ OD tubing
- Mounting: Duct mounting bracket included







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