What sensor types would you prefer for measuring hydraulic fluid for a 5,000 psi go/no-go output? Ambient temp would be industrial range.
Technologies that I am familiar with that address 0-5000 PSI include stainless steel diaphragm with strain gage (variety of types), ceramic piezoresistive and quartz. Setra, Ashcroft, PCB Electronics and Gem sensors are among the places to look for more info.
There was a supplier at Sensors Expo last year showing an etremely small temperature sensor that could be left in the plastic as a disposable sensor without barely impacting the surface quality. I am not aware of other measurements.
Honeywell and others make air flow sensors, primarily for the automotive industry. Last I checked (several years ago) I couldn't find fluid flow as a standard product. Though there are industrial applications where this is done.
Can a 125C rated sensor be stretched to operate at 132C?
What is the limiting factor? nonlinearities? actual damage? calibration?
While manufacturer's have a bit of latitude at exceeding temperatures, one of the first reasons to specify a particular temeperature range is that the accuracy or some specification cannot be guaranteed outside of that range. Depending on the sensor packaging and connector materials you may or may not be able to stretch the temperature range and get the target life. You probably will not get an imediate failure but unless a manufacturer has specifc knowledge of overtemperature testing or an overtemperature application, they are probably going to tell you to avoid that situation.
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