Silicon semiconductor sensor, front-flush (piezo-resistive pressure measurement)
In semiconductor materials, the change in the specific resistance and thus of the signal results from the variable mobility of the electrons in the crystalline structure. This mobility is affected by the mechanical load. The sensitive silicon chip and the process medium are separated by a stainless steel membrane (encapsulation). Depending on the application, paraffin or silicone oil is used as transmission fluid for internal pressure transmission.
Transmitters with piezo-resistive silicon technology stand out due to their high measuring accuracy and long-term stability. Thanks to their fully welded housing, they are durable and can also be used in potentially explosive areas (ATEX).
They are even suitable for small measuring ranges, particularly for hydrostatic level measurements from a height of 0.5 m.