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Fujikura A-Serie (AG2, AP2, AG4, AP4

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Almost no offset drift year on year

Piezo-resistive MEMS pressure sensors are known for their effect of exhibiting offset drift over extended periods of time due to technological reasons. To ensure the best performance, the offset therefore needs to be readjusted once fitted and after each application throughout the product life cycle. This isn't an issue for some applications. Under particular operating conditions, the pressure is known and the software can be used to correct the offset automatically. Other end products specify a service interval within which a calibration is carried out to secure the specification. However, other applications do not permit offset alignment at any point during the entire life cycle. In these cases, allowances have to made for offset drift when evaluating accuracy and error over the years. Many manufacturers do not supply this information either in their data sheet or on request – for a variety of reasons. Long-term data for the Fujikura A series, launched in 2014, now shows that any offset drift demonstrated by the sensors is next to non-existent. This is a first for piezo-resistive MEMS pressure sensors and brings advantages and cost savings for many applications.

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