Temperature Switches are common types of control devices. The control elements of temperature switches contains specific amount of liquid. The liquid increases in volume when temperature increases.

A temperature transducer translates a temperature into an electrical voltage or current. Four important types of temperature transducers are thermocouples, metal or alloy as a resistance-temperature device, thermistor and integrated circuit sensor. Temperature transducers are fixed at locations along the borehole. These transducers are installed within sealed sections of the boreholes. Temperature transducers are efficiently integrated with other measuring systems. Temperature transducers have not been widely employed in the analysis of human behavior. Temperature transducers allow heat to act on an expanding-contracting fluid, thermocouple, variable resistor and pyrometer. Temperature transducers require careful calibration and have poor ageing characteristics.

Temperature Transmitters convert the small millivolt (mV) output of a thermocouple to a current signal that is immune to noise and voltage drops over long distances. They are used with thermocouple temperature probes and bimetallic devices that are suitable for various temperature sensing applications. Temperature transmitters eliminate ground loop problems by isolating the transmitter input from the transmitter output.

Digital Temperature Transmitters provides a factory configuration including 4 to 20 mA, 1 to 5 Vdc or 2 to 10 Vdc. The transmitters are available for four digits LCD temperature indicator. It features 4-digit & 1-decimal point LCD display, celsius or fahrenheit display unit, integral zero & span adjustment and remote sensor function.