For the control of temperature and pressure in industrial or process plants, the indicating controller is used for the control of liquid, gaseous, or vaporous media. The instrument senses the temperature/pressure of the measured medium directly, displays the operating value, compares the measured variable with the setpoint, and puts out a pneumatic signal in the standard range of 0.2 to 1 bar or 3 to 15 psi. This output pressure actuates the final control element. Four control forms are available: ON-OFF, P, P+I, and P+I+D. The units can also be used for remote control of process operations, whether as a pneumatic transmitter (output 0.2 to 1 bar or 3 to 15 psi) or a receiver controller (input 0.2 to 1 bar or 3 to 15 psi).