Honeywell LP916B1017 Return Air Thermostat 

Two-pipe, single temperature, unit mounted, remote bulb pneumatic thermostat used to provide proportional control of pneumatic valves and damper actuators in heating and air conditioning systems. The LP916A, B and C Remote Bulb Thermostats provides proprtional control of induction units, fancoil units, and unit ventilators. Wide throtting range models are available for duct discharge control of heating and/or cooling coils and mixed air dampers.

Features: Liquid filled remote bulb. Direct Acting (DA), Reverse Acting (RA) and Heating/Cooling (DA/RA) models are available. A proportional two-pipe controller with a liquid filled remote bulb thermal element. An integral mounting bracket. A high impact styrene cover and a zinc plated base with a black phenolic knob. Scaleplate available in several ranges. Protected barb connectors. External knob adjustment. A variety of mounting brackets available accessories. A 36-inch (914 mm) capillary length.