Gas pressure sensors

Exact pressure detection is the foundation of safe and efficient processes. DDM Sensors develops and manufactures miniaturized high-precision pressure sensors for gas-carrying systems.

Which gases are the media-contacting parts of the pressure sensors compatible with?

DThe media-contacting parts of the pressure sensors are basically compatible with all gases that are resistant to 316L stainless steel (material numbers 1.4404 and 1.4435), e.g.

• Nitrogen
• Flammable gases such as methane, ethane, propane, and butane
• Ammoniak

For applications with particularly aggressive media, we refer to our specialized range of pressure sensors for aggressive gases.

Technical specifications at a glance

The following table gives an overview of the most important features of the pressure sensor models suitable for gas applications.

Feature	PV25/PX25	PV22/PX22	PV15	PV10
Application focus	High-precision pressure measurement with high analog resolution and small total error.	Flexible applications with large temperature range or special requirements (H2, TEDS).	Miniaturized pressure measurement, often in the automotive sector (e.g. brake pressure).	Highly miniaturized measurements at extreme temperatures.
Material (media-contacting)	Stainless steel 1.4404 and 1.4435.	Stainless steel 1.4404 and 1.4435.	Stainless steel 1.4404 and 1.4435.	Stainless steel 1.4404 and 1.4548.
Construction	Piezoresistive measuring element; microprocessor for linearization and temperature compensation.	Welded stainless steel measuring element; special design to avoid clamping errors.	Miniaturized, welded stainless steel measuring element.	Highly miniaturized, welded stainless steel measuring element.
Measurement type	Relative and absolute pressure.	Relative and absolute pressure.	Relative and absolute pressure	Relative pressure
Measuring range	Relative: 100 mbar to 150 bar; Absolute: 250 mbar to 150 bar.	Relative: 100 mbar to 250 bar:  Absolute: 1 to 250 bar.	2.5 bar to 250 bar absolute and relative	5 bar to 1000 bar(g)
Accuracy	Standard ≤ ± 0.1% of FS Optional: ≤ ± 0.05% of FS ≤ ± 0.02% of FS	Total error: Standard: ≤ ± 1% of FS Optional ≤ ± 0.5% of FS ≤ ± 0.25% of FS Over the working temperature from -40 to 125°C / 150°C	Total error: Standard: ≤ ± 1% of FS Optional ≤ ± 0.5% of FS ≤ ± 0.25% of FS Over the working temperature from -40 to 125°C / 150°C	Total error: Standard: ≤ ± 1% of FS Optional ≤ ± 0.5% of FS Over the working temperature from -40 to 150°C / 180°C
Special feature	PV series with voltage output (0-10V), PX series as transmitter (4-20mA).	Available as TEDS variant (parameter memory)  or H2-qualified for hydrogen.	Very light (approx. 30g); Specially for small installation spaces	Extremely light (approx. 10g); Temperature resistant up to +150 °C (optional +180 °C).

Performance features of DDM gas pressure sensors in detail

The essential performance features of our pressure sensors for gas applications in detail.

Precision and long-term stability for reliable measurement results

Our sensors guarantee high measurement accuracy and repeatability, even when detecting very low pressures. Integrated temperature compensation ensures stable measured values over wide temperature ranges, which range from 0 to 60 °C, over -20 to 80 °C up to special ranges from -40 to 150 °C; the PV10 model can even be used for media temperatures up to 180 °C. The exceptional long-term stability of the sensor signal of typically +/-0.1 % FS per year minimizes the calibration effort. Calibration cycles can thus be extended.

Miniaturized design with minimal internal volume

The compact design allows easy integration into systems with limited space, while the robust stainless steel housings ensure high resistance despite the small dimensions. The extremely low internal dead volume is ideal for applications with high-purity gases or rapid gas changes, such as those found in analytical technology. The volume can be adjusted to customer requirements, and customer-specific pressure sensors with flush diaphragm can also be realized on request.

Highest material compatibility for various gases

Only media-resistant materials such as 316L stainless steel (1.4404 and 1.4435) or titanium on request are used for the media-contacting parts. This ensures suitability for a variety of gases, from inert gases such as nitrogen and argon to special pure gases.

We offer expert advice on the specific material selection for your gas application to ensure optimal compatibility.

Typical application areas of our gas pressure sensors

Our pressure sensors for gas are used in a variety of high-tech industries. These include

• Semiconductor industry for tasks such as process gas control
• General process and plant engineering for leak detection or flow control
• Hydrogen applications, for example in fuel cell technology or H2 infrastructure

Special solutions – customized gas pressure sensors

DDM Sensors entwickelt kundenspezifische Sensorlösungen, die exakt auf Ihre Applikation zugeschnitten sinDDM Sensors develops customer-specific sensor solutions that are exactly tailored to your application. Customization options include:

• Pressure measuring ranges from vacuum to high pressure
• Electrical interfaces and output signals such as ratiometric signals or 4-20 mA
• Mechanical process connections and threads in a wide selection
• Housing and seal materials matching your medium
• Customer-specific calibrations and markings for seamless system integration

Talk to us – we will find the optimal solution for your requirements together.

Quality and reliability – Developed and manufactured in Germany

All pressure sensors from DDM Sensors are completely developed and manufactured at our location in Germany. Strict quality controls integrated into every manufacturing step guarantee the highest product reliability and consistently high quality. Through in-house production, we also ensure long-term availability of our sensor types, which offers you a reliable basis for your series production and future spare parts supply.

Get advice on gas pressure sensors now

Our experienced development team supports you with your specific measuring task. Request a non-binding offer that is exactly tailored to your requirements.