A Pressure Sensor Designed for Hydrogen
One concern in hydrogen systems is hydrogen embrittlement, where hydrogen can affect the mechanical properties of certain metals over time.
The media-wetted components of the DMP 336 use a special stainless-steel alloy based on 316L that was selected for resistance to hydrogen embrittlement.
This makes the DMP 336 a strong option for pressure measurement in hydrogen systems where material compatibility and long-term reliability are important.
DMP 336 Specifications
The DMP 336 is available with:
- Pressure ranges from 0–16 bar through 0–1,000 bar
- 4–20 mA, 2-wire output
- Accuracy of 0.5% FSO
- High overpressure capability
- Resistance to pressure peaks
- Optional intrinsically safe version
- Optional SIL 2 configuration
These options allow the transmitter to be configured for a variety of hydrogen pressure measurement applications.
Typical Hydrogen Applications
The DMP 336 can be used in applications including:
- Hydrogen storage systems
- Hydrogen distribution
- Fuel-cell systems
- Hydrogen test equipment
- Hydrogen production equipment
- Technical gas systems
The correct pressure range, process connection, electrical connection, and hazardous-area requirements should always be determined for the individual installation.
Beyond Hydrogen Applications
The DMP 336 uses a welded, dry stainless-steel sensor, eliminating an internal pressure-transfer fluid from the sensing element.
An oil- and grease-free version according to ISO 15001 is also available for applications such as oxygen service.
These design options make the DMP 336 relevant not only for hydrogen, but also for other technical-gas applications where media compatibility, cleanliness, and sensor construction are important considerations.
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