Pressure Sensors

[Jeffrey S Armfield]

You can buy quartz pressure sensors from PCB and Kistler but these tend to
be pricey and more oriented toward research. You also need a charge amp
to go with the pressure sensor. 

Bosch just published an SAE paper (940379) that describes a new pressure
sensor that they use for misfire detection , knock control , ignition 
control , etc. I have a feeling that you may be seeing these in pass. cars
in the not too distant future. Still some signal processing circuitry
required but the price has to be better than a PCB or Kistler unit. 

Jeff Armfield