I am currently working on a blood pressure monitoring system(for a class) and I was handed an old, non working wrist blood pressure monitor to salvage any components I could. So I tore it down, took out the air valve and air pump. There was yet another component soldered to the PCB which had a hose inlet(which led to the cuff), so I figured it must be the pressure sensor. Indeed it was, see the attached images:
I figured it is a pressure sensitive resistor since it has only two pins, however the multimeter gave a reading exceeding 2000kOhm. I tried blowing into the inlet to simulate pressure rise, yielding no change in resistance whatsoever. From one of the attached images we can see that the two pins of the sensor were connected via some capacitors to the microcontroller. If anyone got any info on the name of this sensor, or maybe a similar one, it'd be appreciated.