Digital Indicator cum Controller is a instrument which senses various process parameters like Temperature, Flow rate, Pressure, conductivity, Humidity, Level, RPM, pH, displacement, counter etc. Digital Indicators / controllers sense process data through sensors such as thermocouples, RTD’s, Pressure transmitter, flow meters etc and display them on 7-segment LED display. This process data is compared with set-point and a control output is given such as relay, milliampere signal etc.