Honeywell T991A Proportional Temperature Controller T991A1186

Modulating temperature controller, 55 to 175°F, 5ft copper element, throttling range, 3°F to 30°F.

T991A proportional temperature controllers provide modulating control of water or air temperatures in ducts, tanks, and similar applications. Standard models have a sensing bulb and capillary; fast-response models have a coiled sensing element that operates at least four times faster than standard controllers, depending upon operating conditions.

Features & Benefits:

• Compensates for effects of ambient temperature on the case and tubing
• Sensing element capillary tubing allows remote mounting of sensing element
• Setpoint may be read and adjusted through cover
• Throttling dial inside case adjusts proportioning range