Honeywell Commercial T991A1426 Proportional Temperature Controller

Introducing the Honeywell Commercial T991A1426 Proportional Temperature Controller — a dependable solution for precise, modulating temperature control in duct and tank applications. This controller features a copper bulb sensor (1/2 inch diameter x 4-3/16 inch) with a 5-foot capillary and a 1/2 inch conduit connection for straightforward installation. With a maximum temperature rating of 125°F, throttling range of 3–10°F, and a set point range of 0–100°F, it provides reliable proportional control in HVAC, process, or equipment environments. Electrical specs include 24–30 VAC at 50/60 Hz and a single 135 ohm potentiometer for analog output.

• Proportional, modulating control for precise temperature regulation across a wide range.
• Copper bulb sensor: 1/2 in diameter x 4-3/16 in length with a 5 ft capillary for flexible mounting.
• Connection versatility: 1/2 in conduit suitable for duct or tank installations.
• Electrical specs: 24–30 VAC at 50/60 Hz; analog output via one 135-ohm potentiometer.
• Range and limits: Set point 0–100°F; throttling range 3–10°F; maximum temperature 125°F.
• Physical dimensions: 4-1/8 in W x 2-3/16 in D x 5-7/8 in H; 50 PSI direct immersion pressure rating; gray color.
• Sensor inputs: 1 sensor input for reliable control.