Type DW - Differential pressure switch Stainless steel version, IP 65

Differential pressure monitoring and direct switching of electrical loads
For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive ambience
Process industry: chemical/petro-chemical, on- and offshore, technical gases, environmental technology, machine building and general plant construction, water treatment, pharmaceutical industry
Pump monitoring and control / filter monitoring, level measurement in closed tanks

Special Features
Case made of stainless steel
Ingress protection IP 65, NEMA 4
Ambient temperature -30 ... +85 °C
1 or 2 independent switch points, high contact rating up to 15 A / AC 220 V
Working pressure (static pressure) up to 160 bar


These high-quality differential pressure switches have been developed especially for safety-critical applications. High quality and product manufacturing to ISO 9001:2000 ensures reliable monitoring of your plant. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.
All wetted parts materials are from stainless steel or Inconel 718, depending on the measuring range. Each switch family is available in IP 65, Ex-ia or Ex-d versions (Ex-d see model DA, data sheet PV 35.43).

In order to ensure as flexible operation as possible, the pressure switches are equipped with micro switches, which make it possible to switch an electrical load of up to 15 A / AC 220 V directly.
For smaller contact ratings, such as for PLC applications, argon gas filled micro switches with gold-plated contacts can be selected as an option.
By using a liquid-filled diaphragm measuring cell with fulcrum lever transmission, the model DW pressure switch is extremely robust and guarantees optimal operating characteristics.

Selected documents