Models DA, DA10

Differential pressure switch

Ex protection EEx-d, IP 65

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Applications of the differential pressure switch

  • 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/petrochemical, 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
  • Ignition protection type GAS Ex-d DUST Ex-tD Gr. II Cat. 1/2 GD

Special Features of the differential pressure switch

  • Case flameproof enclosure
  • 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

Description of the differential pressure switch

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 differential pressure 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-ia see model DW, data sheet PV 35.42).

In order to ensure as flexible operation as possible, the differential 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 DA pressure switch is extremely robust and guarantees optimal operating characteristics.

Differential pressure switch for medium/high setting ranges, model DA
  • Differential pressure switch for medium/high setting ranges, model DADifferential pressure switch for low setting ranges, model DA10
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