PNEUMATIC INDICATING CONTROLLER AND TRANSMITTER
The instrument senses the temperature, pressure or level of the measured medium directly, displays the operating value, compares the measured variable with the set point and puts out a pneumatic standard signal of 0,2 to 1bar or 3 to 15psi. This output pressure actuates final control element, the pneumatic valve. Four control forms are available: ON-OFF, Proportional, Proportional + Integral, Proportional + Integral + Derivative. The units could be also used for remote control of process operations as pneumatic transmitter or receiver controller.