Exhaust Pressure sensing

[Jörgen Karlsson]

Hi,

If you only want to measure mean exhaust backpressure you only need to fit a
long steel pipe that has almost any sensor or why not a gauge at the end. A
1M of 8mm tube bent to a spiral is more or less a standard design over here,
this cools the gas and it also limits the pressure peaks. An 8mm hydralic
compression fitting can be used if you want to.

The wall pressure is what you want to measure and it must be measured at a
straight piece of the exhaust pipe.

I took a look in the digikey online catalog and found a SENSYN ICT sensor
that was fast and able to operate at up to 125ºC. It has Digikey
#287-1115-ND and the response time is .1ms for 10-90% of scale.

With a piece of watercooled copper pipe leading the gas from the exhaust
pipe to the sensor you can keep the sensor close to the exhaust. 30cm of
water cooled 6mm copper line is probably enough and the copper tube will
probably handle the temperatures at the hydralic fitting.

Jörgen


----- End of forwarded message from owner-diy_efi at diy-efi.org -----
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org