Pressure Sensors
Pressure Sensors for absolute, gauge and differential pressures.
Pressure Sensors for Static and Dynamic Measurements
Pressure Sensors, also called Pressure Transmitters, are based on the latest piezoresistive foil strain gauges and inductive measurement technology. Pressure sensors can be used for a wide variety of media and applications, such as monitoring water pressure or measuring pitot pressure. In aerospace engineering, our piezoresistive pressure sensors help distribute pressure across the wing’s surface. They are also used in braking systems for cars and in gas turbine tests.
Pressure sensors are available with analog or digital outputs for measurement ranges between 0.5 mbar and 12,000 bar.
We are happy to help you select the most suitable sensor or measurement solution. Fill in our contact form or contact us directly: you can find the phone numbers and e-mail addresses of your nearest location on our locations page.
Product portfolio Pressure Sensors
Find the perfect pressure sensor for your application. We’d be happy to help you choose.
Professional pressure measurements made easy
We offer a wide selection of pressure sensors for use with liquids and gases in all industrial applications. You can also benefit from our extensive services surrounding sensor and measurement technology: From pressure sensors and transmitters to barometers and differential pressure sensors, standard or miniature configurations, with and without ATEX certification.
Most pressure sensors are suited for a wide variety of purposes. You can use them in any number of applications. In order to identify the right sensor for your application, we start by checking all the requirements. This includes the following information:
- Type and area of application
- Precision requirements
- Output signal
- Electrical power supply
- Mechanical pressure connections
- Environmental conditions
- Medium and temperature
- Sensor configuration and protection class
Althen also offers a broad selection of custom solutions for pressure measurements in specific applications. Contact us and let us know what you need!
Our Pressure Sensors in Use
Would you like to get to know our products in practice? Take a look at these interesting projects from our customers:
Properties & Advantages
- High-precision measurement of absolute, relative, and differential pressure
- For static and dynamic measurements
- Highly reliable
- Durable and suitable for long-term use even under extreme conditions
- Available in many configurations for a wide variety of applications, such as for air/gas, different liquids, or for submerged use
- Special configurations such as miniature or wireless pressure sensors available
- Sensors for static measurement and control of very low differential pressure (from 5 to 1000 mbar)
- Intrinsically safe pressure sensors with ATEX certification
Possible Applications for Pressure Sensors
- Research and manufacturing
- Construction
- Oil, gas, and coal industry
- Mechanical engineering
- Process engineering
- Aerospace engineering
- Automotive industry
- Laboratory applications and medical technology
- Food and beverage industry
- Industrial controllers
It's all about the reference pressure
Pressure sensors and transmitters vary not only by their shape and output signal, but especially with regards to the type of reference pressure used: There are pressure sensors for relative pressure and absolute pressure, as well as differential pressure.
Relative Pressure
For measuring relative pressure, we apply the surroun-ding air pressure to the back of the sensor element. In a typical assembly, this is done via a small tube leading from the back of the sensor to the plug or through the connecting lines. These pressure sensors have the advantage that changes in air pressure do not lead to variance in the sensor output.
Absolute Pressure
Sensors for absolute pressure have a small chamber on the back of the sensor membrane which is completely evacuated and therefore has an absolute pressure of 0 bars. As long as no particular pressure is applied, these pressure sensors show the current air pressure, which lies between 950 and 1050 mbar. Any change in air pressure (e.g., from changing weather conditions) therefore leads to a change in the measurement signal, even if there is no change in the actual pressure you are measuring. Barometers are a special type of absolute pressure sensors which measure the surrounding air pressure with great precision.
Another special type of pressure sensors are so-called sealed gauge sensors. Their reference chamber is sealed at approx. 1000 mbar. These pressure sensors are primarily used for measurements above 10 bar. The seal protects the reference chamber against the introduction of aggressive gases, which can cause corrosion.
Differential Pressure Sensors
The so-called differential pressure sensors are another special type of pressure sensors. The back of their sensor membrane is mechanically constructed in such a way that it serves as its own pressure connector for pressure measurements. A pressure sensor (pressure socket or pressure measurement socket) like this will measure zero pressure if the pressure is the same on the input and reference sides. Differential pressure sensors come in a wide variety of mechanical designs. There are simple designs which can only be used with dry gases on the reference side, or highly specialized pressure transducers that allow for more than 200 bar overload, even on one side, and still measure in the range of 35 mbar.
Pressure Transducer
Pressure transducers are typically constructed to be very rugged and provide a common output signal of 4-20 mA for process measurement technology.