PM / PY flush mount pressure transmitters
Technology

Ceramic capacitive technology explained

Ceramic capacitive technology

The most important element of the ceramic capacitive technology is the ceramic (Al₂O₃) measuring cell. After assembly, the ceramic cell element resembles a plate capacitor with a reference electrode and a measuring electrode placed 0.01 mm apart. The capacitance is inversely proportional to the distance between the electrodes. As pressure is applied, the distance changes by a small value and the capacitance changes proportionately. This signal is then converted into pressure by a microprocessor.

Note: The body of the sensor is different for the various families, but the measuring cell assembly is the same for all.

Benefits of the ceramic capacitive measuring cell

Robust direct sensing measuring technology
Eliminates possibility of contamination from diaphragm fill fluid
Internal support construction creates very high pressure ratings
Ceramic cell is more resistant to abrasion, dents or dings that can create measurement offsets
Highest overload pressure rating, especially with dynamic pressure peaks

Insulated tank solution

Proven sensor electronics with sanitary design and robust ceramic cell

First non-metal diaphragm solution on the market for insulated tanks.
Use with an adapter that matches the profile of the weld-in shell allowing the use of a single sensor for multiple shell styles.
The adapter comes with the appropriate coupling nut which holds the sensor in place in the weld-in shell. Once hand-tightened, the sensor profile seals against the weld-in shell to create a robust and sanitary connection.

The robust system increases availability and performance

ifm is a build-to-stock organization and this two-piece solution allows us to increase component availability by producing standard sensors. This allows ifm to increase production efficiency and keep standard components in stock which increases availability and decreases cost.