Robertshaw ETC Mechanical Thermostat, Line Voltage, -30 to 220 deg F, 1 - 30 deg F Differential, (1) SPDT, Open Close On Rise Switch, Thermistor Sensor, 14 Inch Dia x 2 Inch L Sensing Bulb, 1 Stage, 24 VAC, 16 A at 120 VAC, 8 A at 208240 VAC, 1 Relay Inputs, 1 Relay Outputs, Horizontal Vertical Mount, NEMA 1, Gray, 2-12 Inch L x 2-34 Inch W x 6-12 Inch H Wide temperature ranges available Wide differential adjustment LCD read-out for sensor temperature, control settings, and relay status High amp output relay EEPROM memory retains control settings during power outages Keypad lockout to prevent end user alteration of settings Extendable 8 ft lead with sensor up to 400 feet using 18 or 22 ga thermostat wire Easy 4-step setup Single and AC models1 k Ohm 0 - 10 V output impedance1 Relay Input1 Relay Output Standard Approvals: CSA LR68340 Class 4813 Certified, UL E94419 Listed Application: Milk Coolers, Refrigerated Display Cases, Staging Heating Cooling and Walk-in and Reach-in Refrigerators