Pressure Sensors

"High Temperature (800°C) MEMS Pressure Sensor Development Including Reusable Packaging for Rocket Engine Applications" -- https://asmedigitalcollection.asme.org/CANEUS/proceedings-abstract/CANEUS2006/42541/287/316165

Model: 176M09 from PCB Piezoelectronics. https://www.pcb.com/products?m=176M09 (Sensor appears to work to 530C, but "receptacle" only goes to 260C).

"The "IMPACT" series of Gefran are pressure transmitters, without transmission fluid, for using in high temperature environment (350°C)." -- https://www.gefran.com/en/products/226-in-impact-fluid-free-voltage-output

"Our Quartz technology, combined with our expertise in high temperature circuits and custom ASICs, provides an unmatched pressure and temperature sensor for downhole oil and gas." -- http://www.quartzdyne.com

"The base technology used in designing and fabricating the Sandia Quartz Resonator Pressure Gauges for geothermal well logging is presented. The following topics are treated: resonator design (crystallographic orientation), transducer design (static stress analysis and transfer function), electrode technology, and assembly details. In addition, preliminary results of pressure measurements at 275°C are presented." -- https://www.osti.gov/biblio/6436152 (1979)

US Patent 4,550,610, 1985 - EP Eernisse - A quartz resonator pressure transducer includes a generally disc-shaped … https://patents.google.com/patent/US4550610A/en

"Silicon carbide used for the new NASA technologies, rather than the traditional silicon, eliminates the need for cooling. The current generation of SiC-based pressure sensors has been demonstrated to operate for 130 hours at 600 degrees C", https://www.automation.com/en-us/articles/2007-2/endevco-licenses-nasa-technology-for-new-silicon-c