Indoor Sensor The Indoor Sensor 077 is designed to act as a remote indoor temperature sensor. It can be used in a number of applications for indoor temperature sensing, and is sized for attachment to a 2 x 4 inch electrical box. This is a 10K thermistor designed to be installed with a compatible tekmar thermostat or control. Features Compatible with tekmar thermostats that support auxiliary sensors 10K thermistor Agency Approvals CSA C US Dimensions 4-1/2" H x 2-7/8" W x 1/2" D (114 x 73 x 13 mm), 3/16" D (5 mm) when installed Operating Range -60 to 140 degrees F (-51 to 60 degrees C), splashproof Sensor NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta = 3892 Sensor Material baked enamel (white) on steel, 12 IN (30 cm) 20 AWG, XLPE multi strand Resources Datasheet Installation Instructions More Info