The DS31 is a differential pressure switch for overpressure, underpressure and differential pressure measurements. The uncomplicated and durable membrane measuring mechanism is suitable for neutral fluid media, e.g. service water, heating water, neutral gases and oils. Due to the pressure or differential pressure to be measured, a one-sided force acts on the membrane. This force moves the membrane system against the pre-tensioned measuring range spring. A switch tappet mounted on the membrane actuates a micro switch. The switch-point can be set with the setting button of the adjustment spindle. One scale and a setting mark attached to the type plate show the respectively set switch-point.
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