Honeywell T921A1191 135ohm Thermostat 56-84F Range

Proportional Thermostats provide low voltage, 3-wire control for valve motors, damper motors, and balancing relays in heating or cooling system applications.

Features:

• Bellows element adjusts potentiometer slider to regulate motor operation
• Removable setting knob prevents unauthorized tampering with setpoint
• Wall Mounting
• Throttling Range - 2.5F, 1.4C