Temperature sensors shall be of the thermistor (NTC) type with a highresistance change versus temperature change to insure good resolutionand accuracy Sensors shall be available for room, duct or well mounting. Sensors shall connect to remote controller by means of a two wire unshielded cable. Room type sensors will be available with a built-in set point potentiometer. Sensor shall be available in various ranges to properly suit the application.Preferred Brand : Please specify if any "