The Honeywell T991A1012 is a reliable proportional (modulating) temperature controller designed for precise control of water or air temperature in ducts, tanks, and similar HVAC or process environments. Featuring a remote copper sensing bulb with a 20-foot capillary tube, it enables flexible installation and accurate thermal regulation. Ideal for installations requiring smooth, variable control rather than on/off cycling.
Specifications:
- Capillary Length: 20′
- Application: Modulating Temperature
- Output: One 135 Ohm Potentiometer, Analog
- Voltage: 24V, 24 VAC to 30 VAC
- Hertz: 50, 60
- Color: Gray
- Height: 5-5/8″
- Width: 2″
- Depth (Inches): 2-1/4″
- Sensor Type: Copper Bulb
- Sensor Inputs: 1
- Bulb Size: 1/2″ x 4-3/16″
- Max Temp (F): 100°F, 0° to 100°F
- Max Operating Temp: 125°F
- Throttling Range: 3°F to 30°F
