Model DMSU21SA Diaphragm Monitoring System with HART? Protocol from WIKA

WIKA Model DMSU21SA Diaphragm Monitoring System with HART? ProtocolThe model DMSU21SA diaphragm monitoring system fulfils the constantly growing requirements for process monitoring on plants for sanitary applications. With the HART? protocol, not only the measuring signal, but also the status of the integrated diaphragm monitoring can be transmitted, as required, to the process control. The system architecture with integrated diaphragm monitoring bridges the gap between digitalization and process reliability.

With the patented diaphragm monitoring, a monitoring element is mainly used for electrical/digital signal transmission of the diaphragm condition. In addition, the diaphragm condition is displayed on a dial with red/green areas. 

In the event of a diaphragm rupture, a second, internal diaphragm ensures the reliable separation of the environment and the process. A fluid inside the system, which is explicitly chosen to suit the particular measuring requirement, hydraulically transmits the pressure to the pressure measuring instrument. Depending on the application, the system fill fluid is FDA- and also USP-compliant.

The diaphragm monitoring system can be supplied with all common process connections for sanitary applications and fulfils the applicable standards for them, e.g., EHEDG, 3-A, and ASME BPE.

Features

Model DMSU21SA Diaphragm Monitoring System with HART? Protocol Features

  • Double-diaphragm system prevents contamination of process and environment
  • Hygienic process connections in different designs
  • Signal transmission and configuration with only one cable per measuring location
  • Minimal installation costs, even with retrofitting

Applications

Model DMSU21SA Diaphragm Monitoring System with HART? Protocol Applications

  • Hygienic pressure measurement for the pharmaceutical industry and for aseptic food processing
  • Pressure/vacuum measurement on pipelines, fermenters, bioreactors, and vessels, as well as with processing and transport of high-quality media
  • Suitable for the production of active pharmaceutical ingredients (API)
  • For the monitoring of processes with sterile steam
  • For gases, vapor, liquid, pasty, powdery, and crystallizing media

Q & A

Q&A Section with Expand/Collapse Icons

Model DMSU21SA Diaphragm Monitoring System with HART? Protocol Q & A

+ What is the WIKA DMSU21SA and how does it work?
The WIKA DMSU21SA is a sanitary diaphragm monitoring system that provides continuous pressure measurement while also monitoring diaphragm integrity. It uses a double-diaphragm design and communicates real-time pressure and diaphragm status through the HART? Protocol, allowing seamless integration into modern control systems.
 
+ What industries and applications is this system best for?
This system is designed for hygienic and aseptic environments, making it ideal for pharmaceutical manufacturing, bioprocessing, and food and beverage production. Its sanitary construction and compliance with EHEDG, 3-A, and ASME BPE standards ensure safe use in contamination-sensitive processes.
+ How does the HART? Protocol improve monitoring and connectivity?
HART? enables digital communication over the standard 4–20 mA loop, allowing operators to receive both process pressure data and diaphragm condition alerts remotely. This provides better diagnostics, easier integration with DCS/PLC systems, and improved support for digital plant initiatives and Industry 4.0.
 
+ What are the main construction and sanitary design features?
The DMSU21SA is built with stainless steel materials and a double-diaphragm seal that prevents cross-contamination. It uses FDA/USP-approved fill fluids and is available with a variety of sanitary process connections to support common hygienic piping and vessel installations.  
 
 
+ What should buyers know about installation and maintenance?
The system installs easily using a single wiring run and can be retrofitted onto existing sanitary pressure measurement points. It provides local status indication and digital alerts for diaphragm issues, helping operators catch failures early and reduce unplanned downtime.
 


 

Downloads

Download WIKA Model DMSU21SA Diaphragm Monitoring System with HART? Protocol Datasheet

To learn more, please call (855) 737-4714 or fill out our online form to speak to one of our technical specialists.

 
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