AIR4111T20R

Room Air Quality Monitor, 0-2000 ppm CO2 Equivalent, LCD Viewable, LED Viewable, 20,000 Ohm, NTC Thermistor, ?0.2 C, Relay Output https://downloads.greystoneenergy.com/Submittals/PS-AIR41XXX.pdf https://downloads.greystoneenergy.com/Install%20Notes/IN-GE-AIR41XXX.pdf