HONEYWELL T991A1186 Modulating Temperature Controller, 55 F to 175 F. For modulating control of water or air temperature in ducts, tanks and similar applications.
Fast response models (for duct mounting) have coiled sensing element giving at least four times faster response than standard models.
Ambient temperature compensated for 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 proportional throttling range.