Smart Positioner controls stroke of the actuator in proportion to the input signal between 4-20mA. Besides, an efficient built in microprocessor performs functions like auto calibration, PID control, Alarm and Hart protocol etc. In addition, LCD display unit communicates status of actuator unit. Hart communicator processes variety of information related to actuator & positioner. PID parameters can be easily adjusted in the field without using communicator. Positioner transmitter is also offered as an optional accessary.