Model DMS27

Diaphragm monitoring system

For the chemical and petrochemical industries

Selected documents
Sales contact

WIKA Instruments Ltd.

+44 1737 644008
+44 1737 644403


  • Suitable for applications with hydrofluoric acid content
  • For aggressive, contaminated or hot media
  • Pressure/vacuum monitoring on pipelines or transport of critical media
  • Pressure measurement for the chemical/petrochemical sectors, oil/gas industries and water/wastewater plants

Special features

  • Double-diaphragm system to ensure the separation of the process and the pressure measuring instrument
  • Process connection with flange to provide for direct threaded connection
  • All welded design with flush diaphragm
  • System entirely from Hastelloy
  • Patent applied for in various countries, e.g. DE 19 94 98 31


The WIKA combination of diaphragm seal, pressure measuring instrument and monitoring instrument is ideally suited for the harshest measurement tasks. The system can withstand aggressive, contaminated or hot media and ensures a secure connection between the medium and the diaphragm monitoring system.

The patented diaphragm monitoring has been designed specifically for the highest safety requirements in the chemical and petrochemical industries. Through the diaphragm monitoring, the risk of an unnoticed rupture of the diaphragm is avoided, since this is immediately indicated on the monitoring instrument. In addition, an electrical signal can be transmitted to the system control.

In the event of a diaphragm rupture, a second diaphragm in the pressure measuring instrument ensures the reliable separation of the environment and the process.

Mounting of the diaphragm seal to the pressure measuring instrument is made as direct mounting as standard. A fluid inside the system, which is explicitly chosen to suit the particular application, hydraulically transmits the pressure to the pressure measuring instrument.

Diaphragm monitoring systems with the WIKA model 990.27 diaphragm seals are used successfully in applications with hydrofluoric acid content.

Diaphragm monitoring system
  • Diaphragm monitoring systemWIKA diaphragm monitoring system
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