piclist 2002\01\28\180647a >
Thread: Force sensors
www.piclist.com/techref/io/sensors.htm?key=sensor
picon face BY : Russell McMahon email (remove spam text)



> The oldest pressure metering system uses tiny pitots and thin rubber
> tubing with 'U' water manometers mounted on a vertical panel. Add
> watercolor to the H20 and a movable ruler as scale. You can change water
> for something much lighter for higher sensitivity (benzine will work but
> it is flammable).

Manometer sensitivity can also be increased by placing the "readout" arm at
an angle so that the same vertical height is covered by a longer arm length.
This could be measured electronically. Bandwidth/response rate will not be
large.

> Motorola makes pressure gauges that work at the pressures you need, both
> absolute and relative.

Far easier than the above but less visually impressive :-).



       RM

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