NEMA 4 The Ranco ETC is a microprocessor based temperature controller suitable for switching 120Volts at up to 16Amps for heating or cooling applications making it suitable for a wide range of applications. Digital Display Unlike many electronic controls, the ETC is simple to install and set up. One finger is all you need to program it. The standard digital display and keypad allow the user to adjust the temperature settings with 1F resolution. Setpoint temperature, differential and mode of operation (heating or cooling) can all be selected using the keypad and display. Choice of One or Two Stage Models The ETC line includes both one and two stage models. On two stage controls, each stage can be set independently thus eliminating the bothersome task of calculating interstage temperatures. The two stage models can be set up with overlapping heating or cooling stages. Not sure which model you need? Try our ETC Model Selector. Remote Temperature Sensing and Temperature Averaging. The ETC is capable of remote temperature sensing up to 400 feet away from the control when using standard 22 gauge sensor wire. Plus 4 sensors can be connected to the Ranco ETC controller for monitoring the average temperature of an area. Built-In Safety Every ETC model is equipped with diagnostic programs that check for hardware, software or system problems and display different error codes to indicate where the trouble is. The ETC also has a keypad lockout switch to prevent tampering with the control setting by unauthorized personnel The switch, which is located inside the enclosure, can be used to disable the keypad function. On power up, time delay protects equipment from simultaneous restarts and the EEPROM memory retains control settings during power outage. Maximum Application Flexibility * Wide temperature range (-30F to 220F) and differential adjustment (1F to 30F) * Accepts 120/208/240 volt input. * Relay controlled so it can control 0 to 240 volts. * Output can be isolated from the input voltage that powers the controller (each stage in 2 stage units can be isolated. * User selectable heating/cooling modes for use in hundreds of applications. * Replaces most electromechanical and electronic temperature controls.