delta p fonction

Monitoring the operation of a ventilation box, air handling unit or air network of a building.

Function : Air Pressure Delta

Available technologies



Measure a delta pressure:

  • Between the atmospheric pressure and the inside of the ventilation box
  • on both sides of an element (e.g.: filter)

Collect data of a 0-10V sensor

e.g. ammeter clamp for distinguishing a power failure



On exceeding threshold(s)

Pressure difference or through 0-10V input

On digital input events

e.g.: indication of a machine fault




Controlling the AON outputs


3 features:

  • Pressure difference: relative to the atmospheric pressure or between two different zones
  • 2 digital inputs / outputs:  for connecting to a PLC for tracing alerts or operating states
  • 1 analogue input 0-10V: for connecting to a sensor


Technical specification

  • Periodic or event mode
  • Operating temperature range : -20°C /+70°C
  • Delta pressure : -500/+500Pa
  • Accuracy : +/- 3%
  • Casing : IP68
  • Dimensions : 200 x 63.5 x 34 mm
  • Replaceable battery
  • Integrated fastening system : DIN rail, tube, wall, collar
  • Zone : Sigfox : RC1 / LoRaWAN : EU863-870 / WMBus on request (MOQ)
  • Standards : Directive 2014/53/UE (RED)
Case studies
  • Operation monitoring | Ventilation box

    When positioned on a ventilation box, the Delta P lets one monitor, at a distance, the proper operation of the system, and it will be alerted in the event of a malfunction (electrical, breakdown, fouling...). >>>
  • Monitoring of fouling | Ventilation filter

    Positioned either side of an air unit filter, it allows one to know the fouling status of the filter and to anticipate any interference.>>>