Pressure Sensors for Hydrogen: Precision and Safety from DDM Sensors

We offer high-precision, durable pressure sensors specifically engineered to meet the demanding requirements of hydrogen applications.

Reliable Pressure Measurement Across the Entire H2 Value Chain

We specialize in pressure measurement technology for demanding hydrogen applications, providing solutions that guarantee maximum material compatibility and long-term stability. Our products are rigorously designed for safety in critical systems, making us your reliable partner across the entire value chain of the hydrogen economy from production to final application.

The Unique Challenges of Hydrogen Pressure Measurement

Measuring hydrogen pressure places distinct demands on sensor technology. A primary concern is hydrogen embrittlement, which can lead to material fatigue and failure in unsuitable metallic components. Due to the small molecular size of H₂, there is also a high risk of permeation through seals and diaphragms. Furthermore, H₂ systems often operate under high pressures and rapid pressure cycles, requiring exceptional mechanical robustness from the sensors. 

Hydrogen Pressure Sensors from DDM Sensors

Our hydrogen-qualified pressure sensors from the PV and PX series offer comprehensive coverage for various measuring ranges and operating requirements. All wetted parts are manufactured from highly resistant 316L (1.4404 / 1.4435) stainless steel, and every sensor undergoes a 100% helium leakage test after welding. The following table provides an overview of DDM Sensors’ pressure sensors for hydrogen applications.

Model	Measuring Ranges	Overpressure Resistance	Accuracy (Total Error)	Operating Temp.	Diaphragm/Process Conn. Material	Electrical Outputs	Process Connections
PV-15	Gauge: 2.5 to 150 bar	200 to 400 %	≤ 1 % (Std), opt. ≤ 0.25 %	-40 to +125 °C	1.4404, 1.4435	0.5 to 4.5 V	M6×1 / M8×1
PV-22	Gauge: 0.1–150 bar / Abs: 2–150 bar	200 / 400 %	≤ 1 % (Std), opt. ≤ 0.25 %	-40 to +125 °C	1.4404, 1.4435	0–5 V / 1–6 V	Various
PV-22H²	Gauge: 0–4 bar / Abs: 0–5 bar	200 / 400 %	≤ 1 % (Std), opt. ≤ 0.25 %	-40 to +125 °C	1.4404, 1.4435	0–5 V / 1–6 V	Various
PX-22	Gauge: 100 mbar–150 bar / Abs: 2–150 bar	200 / 400 %	≤ 1 % (Std), opt. ≤ 0.25 %	-40 to +125 °C	1.4404, 1.4435	4–20 mA / 0–5 V / 1–6 V	M10×1, G1/4, etc.
PV-25H	Gauge: 0.1–150 bar / Abs: 0.25–150 bar	200 / 400 %	≤ 1 % (Std), opt. ≤ 0.25 %	-20 to +150 °C	1.4404, 1.4435	0–5 V / 0–10 V	G1/4“ int. / ext.
PV-2722	Differential: 100 mbar to 3.5 bar	200 to 400 %	≤ 1.5 % (Std), opt. ≤ 0.5 %	-40 to +125 °C	1.4404, 1.4435	0–5 V / 1–6 V	M10×1 (80° int.)
PX-2722	Differential: 100 mbar to 3.5 bar (bi-directional)	200 to 400 %	≤ 1.5 % (Std), opt. ≤ 0.5 %	-40 to +125 °C	1.4404, 1.4435	4 to 20 mA	M10×1 ext.

Engineered for Maximum Safety and Durability

All wetted materials are made of hydrogen-compatible stainless steel (316L / 1.4404 / 1.4435) to prevent embrittlement. The sealing concept relies on a fully welded, hermetically sealed sensor design without any elastomers, effectively minimizing the permeation of H₂ molecules.

Thanks to superior overpressure and burst safety ratings, the sensors reliably withstand operating pressures and dynamic pressure spikes. These pressure sensors are engineered for wide operating temperature ranges from -40 °C to +125 °C, and their exceptional shock and vibration resistance makes them an outstanding choice for mobile applications.

Application Areas for DDM Hydrogen Pressure Sensors

Pressure sensors from DDM Sensors are suitable for a wide range of applications across the $H_2$ value chain, including:

• Electrolyzers and hydrogen production facilities

• Fuel cell systems for vehicles and stationary power generation

• highly dynamic test benches and R&D applications.  

Our sensors are particularly well suited to the development of fuel cells, where they are used for precise pressure measurement at the various stacks. Their suitability has been specifically tested in the demanding mixture of hydrogen, water (vapour) and oxygen (H₂/H₂O/O₂). 

Custom Solutions for Hydrogen Pressure Sensors

In addition to our standard portfolio, we offer the development of customer-specific custom solutions for hydrogen pressure sensors. We can adapt process connections, housings, and electronics to seamlessly integrate the sensor into your system. Working in close collaboration with you, we develop the perfect measurement solution for your highly specialized applications.

Availability, Lead Times, and Technical Support

We are happy to provide current lead times for our standard products as well as for custom configurations. Common models are kept in stock to ensure rapid delivery.

Consult Our Experts for Hydrogen Pressure Sensors

Request a non-binding technical consultation with our experts today or receive a direct quote for your project. We are here to help you find the optimal hydrogen pressure sensor solution for your requirements.