Model DPS40

Differential pressure switch


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Monitoring and control of filters, compressors and pumps for:

    • Boilers and pressure vessels
    • Drinking and cooling-water treatment plants
    • Pressure-boosting and pumping stations
    • Heating technology
    • Fire-extinguishing systems

Special features

  • With one or two adjustable micro switches
  • Shatterproof window and robust aluminium or stainless steel measuring chamber for increased requirements
  • Optionally with approvals for hazardous areas
  • High ingress protection, IP65, for outdoor use and processes with high condensation
  • Low measuring range from 0 ... 250 mbar


The differential pressure gauges of the DELTA-line product family are primarily used for the monitoring and control of low differential pressures where there are high requirements in terms of one-sided overload and static pressure.
Typical markets for these products are the process heating technology, the heating, ventilation and air-conditioning industries, the water/wastewater industry, and machine building and plant construction. For these, the main function of the measuring instruments is the monitoring and control of filters, compressors and pumps.

Wherever circuits need to be switched safely dependent on a defined differential pressure, the DELTA-switch finds its use. As the pressure passes above or below a defined set point, the switching operation is triggered.

The switch point is accessible from the front and can be set in the range of 10 ... 100 % of the end value of the measuring range by means of an assistant scale.

The robust instrument with a shatterproof window achieves high durability, even under harsh ambient conditions. This ensures that there is no danger from the instrument and it is resistant to external mechanical impacts.

The measuring chamber, depending on the requirement and application, can be made from aluminium or stainless steel. Through the increased stability, the stainless steel measuring chamber is also suitable for gaseous media.

Aluminium measuring chamber

Aluminium measuring chamber

  • Aluminium measuring chamberStainless steel measuring chamber
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