Differential pressure sensor VSA 24-D

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Reference VSA 24-D
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  • Two switching outputs
  • Signal suppression during the cold start phase and for short-term pressure peaks
  • Visual / electrical display of status and error messages
  • Self-monitoring
  • LED illuminated halo visible from every angle
  • Display of status and error messages
  • M12 plug connection
  • Reset function

The differential pressure sensor VSA 24-D... is a pressure switched controlled by microprocessors with two switching outputs for advance warning (filter contamination high!) and shutdown (maximum contamination reached!). A piston located in the screw-in unit moves across the filter element against the effect of the spring as a result of the increasing pressure drop. The position of the piston, which corresponds to the pressure drop, is transmitted to a sensor in the top.

Electronics converts the sensor values being processed into visual and electric signals. Four green LEDs installed annularly in the transparent top of the device signalise the activation of the gauge by blinking immediately after applying electrical voltage. At the same time, a temperature sensor measures the oil temperature in the screw-in unit. The device is not ready for operation until a specific operating temperature is reached. This point in time is shown by means of continuous lit green LEDs. Now, if the filter capacity continues to decrease during the operation of the system due to exhaustion of the filter element, the differential pressure slowly increases. When there is only approx. 25% residual capacity left, four yellow LEDs are also continuously lit. If the capacity is completely exhausted, there are also four red LEDs. In addition to the LEDs, semiconductor switching outputs are activated, which transmit the actual state to machine monitoring. There is no differential pressure, when no oil is running through the filter. In order to signalise the actual state of the filter element to the user at this moment, the yellow and red LEDs and the switching outputs remain activated until the current supply is interrupted or until the reset button is pressed. At the latest, this takes place when the filter element is replaced. This device is self-monitoring; in the event of a malfunction, this is shown by blinking red LEDs and switching output two is activated without activating the yellow LED.

VSA 24-D
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