"Dan Luke" wrote in message
...

What kind of sensor is it? It's a turbine type, right?

It is a rotary sensor, but I'm not sure it is a turbine. Some type of
positive-displacement paddlewheel design.

Higher pressure giving lower flow indication is what is wierd. Actually,
we would like it to not change.

Interesting problem. Perhaps the higher static pressure is putting some
kind of friction load on the turbine shaft, maybe by deforming an o-ring
seal or some such.


Something like that is all I could theorize, also. We suspected for a while
that we had bubbles giving abnormal high readings, and the increaed pressure
from the boost pump prevented the vapor bubble formation and thus lowered
the readings, but we did about everything that we could think of to
eliminate bubble formation, to no avail. I concluded it was the sensor
itself.