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The ST9120U1011 monitors the thermostat for heat
For situations where a utility grade thermocouple is the best solution
IMPORTANT These valves are not for use in systems containing dissolved oxygen
The 75F Ceiling Sensor offers high-precision temperature and humidity measurement for increased comfort in open floorplans or zones without room for a wall-mounted sensor
They can be either programmable or non-programmable
TL8230A1003/U No Image The ST9120U1011 monitors the thermostatHoneywell TL8230A1003 LineVoltPRO 8000 Thermostat features 7 day programming maintains the pre set program schedule for up to 20% energy savings, or modifies the schedule to fit your lifestyle. The TL8230A1003 has large, clear, backlit display (easy to read in various lighting conditions) and is soundproofed for quiet operation (reduces the clicking noise commonly heard with conventional thermostats).
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