Honeywell Commercial T991A1079 Proportional Temperature Controller

The Honeywell Commercial T991A1079 Proportional Temperature Controller delivers precise, modulating temperature control for duct and tank applications. This proportional temperature controller uses a copper bulb (1/2 inch diameter, 4-3/16 inch length) with a 20-foot capillary and a 1/2 inch conduit connection for straightforward installation in demanding environments.

With a setpoint range from 160 to 260°F and a throttling range of 3 to 30°F, it provides flexible, responsive control up to a maximum temperature rating of 280°F. The device operates with a 24–30 VAC contact rating at 50/60 Hz and offers a single analog output via a 135 Ω potentiometer for seamless integration into control systems.

• Proportional, modulating control for precise temperature maintenance
• Robust construction with copper bulb, capillary, and 1/2" conduit connection
• Compact dimensions 2" W x 2-1/4" D x 5-5/8" H; Gray color
• Wide compatibility for duct and tank applications; ideal for commercial HVAC and process control
• Direct immersion ready with 50 PSI pressure rating and single analog output