The task of positioners is to turn the electrical signal received from the system to a pneumatic signal.

A digital positioner as a stock model

With the help of a SMAR digital positioner the motion of the valve is monitored magnetically with a Hall sensor that enables to avoid the inaccuracy caused by the clearances in lever mechanisms. The same positioner can be used both in linear- and rotary-moving single- and double-acting actuators. An option is a digital display that enables an adjustment in the field without any programming devices.

The control mode is 4–20 mA Hart, Profibus PA or FF.

Digital and electrical-pneumatic actuators by other manufacturers are also available.

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