I'm using the MPX5--- series to monitor oill, water and fuel pressures. Not sure that they're really rated for oill, gas and water but been working OK since 1999 (and 367+ hours on the plane). I did fill the hoses going to the sensors with oil, but imagine that that's well diluted by now. The price is right and they're so easy to interface: just feed then +5 volts and you get a linear output and a known offset. I never calibrated mine, just used the nominal data sheet values. Don't have the equipment to calibrate them.

Note that I'm running carbs, so fuel pressures are never more than 5 psi.  If you have a mill, you might consider making enclosures for them. Would be a nice safety feature which I don't have.

Finn

Rino wrote:

I am planning on using Motorola sensors (MPX5700) to read the intake
manifold and turbo output.  I am a bit confused about the type of sensor
to use.

I believe that I should use an Absolute sensor for the intake plenum and
a Gauge sensor for the turbo pressure ---But I am not sure!  
The meters will be calibrated to read in inches.

Can someone comment on this --- Ed and Tracy probably know about this.

Also, has anyone ever used these sensors to read fuel pressure, are they
resistant to fuels?

Thanks

Rino
Turbo 13b Glass Goose

  

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