Accurate air pressure measurements are essential for the safe and efficient operation of modern aircraft. The aero-engine environment is especially demanding for onboard sensors used to monitor and control important aircraft systems. Manufacturer blueprints of future, more fuel-efficient, engines specify operation at even higher temperatures, imposing tougher requirements for pressure sensor reliability. However, no calibration service could demonstrate long-term measurement stability for such sensors.

In July 2019 Baker Hughes a new calibration method developed in a PTB led EMPIR project enabled the company to certify Trench Etched Resonant Pressure Sensors were within the target limits.

Importantly for Baker Hughes, this established the stability of its reference standard and the reliability of the prototype high temperature sensor, that was duly delivered to its client at a technology readiness level above its initial expectations.

https://www.euramet.org/casestudies/casestudiesdetails/news/reducing-aero-engine-operational-costs/