At Endress+Hauser, we have decades of experience when it comes to sensors that measure pressure in industrial applications. One area that is often of interest is the difference between ceramic and metallic pressure sensors, and whether there is an advantage to using one kind of sensor over the other.
In the pressure industry most sensors are metallic, oil-filled sensors. Despite being ubiquitous in the industry, they have a number of drawbacks in certain applications. These limitations directly affect reliability, safety, and cost effectiveness. They include:
- An extremely sensitive, thin metal diaphragm that is easily damaged
- Metal membranes that are susceptible to damage or compromise from vacuum installations, abrasive media, and highly corrosive process fluids
- The metals and fill fluids that are most protective can be prohibitively expensive
- Though considered linear, they are actually slightly non-linear
While certainly not as widely used, ceramic sensors have a wide variety of benefits. These positive factors include:
- No oil contained in the sensor
- Added strength and thickness of process membrane makes them highly resistant to process fluids with abrasive particles
- A harder component make up, so more resistant to higher overpressure events
Of course, no sensor is perfect, and ceramic sensors are not right for every application. These include:
- Some compatibility issues with strong acids
- They require O-ring seals since they cannot be welded to metal.
If you want to learn more about the benefits of ceramic pressure sensors over metallic sensors as well as our unique ceramic pressure sensors with Ceraphire®, please download our free whitepaper Ceramic vs. Metallic Pressure Sensors or contact us directly today.