WIKA Differential Pressure Switch (DW03UN)

For very low setting ranges


  • Differential pressure monitoring and control of processes
  • Safety-critical applications in general process instrumentation, especially in HVAC and power generation incl. nuclear power plants
  • For gaseous and dry media

Special features

  • No power supply needed for switching of electrical loads
  • Robust switch enclosure from stainless steel 316L, IP66, NEMA 4X
  • Setting ranges from 0.3 … 2.5 mbar to 0.7 … 16 mbar with high working pressure and high static pressure up to 300 mbar
  • Intrinsic safety Ex ia available
  • 1 set point, SPDT, high switching power up to AC 250 V, 10 A

Sales Contact (Wika.sales@asyatrafo.com)




These high-quality differential pressure switches have been developed especially for safety-critical applications. The high quality of the products and manufacturing in accordance with ISO 9001 ensure reliable monitoring of your plant. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.

In order to ensure as flexible operation as possible, the differential pressure switches are fitted with micro switches, which enable the switching of an electrical load of up to AC 250 V, 10 A directly.


By using a diaphragm measuring system, the model DW03UN differential pressure switch is extremely robust and guarantees optimal operating characteristics and the highest measuring performances, with repeatability lower than 1 % of span.

The process connection with a centre distance of 54 mm lower mount allows an easy and comfortable mounting of a standard valve manifold.