Exhaust gas particle sensor

Details Exhaust gas particle sensor Exhaust gas particle sensor

1995-12-14

1997-01-07

McGraw, Vincent P.

Optics: measuring and testing

For light transmission or absorption

By comparison

356437, 356438, G01N 2115, G01N 2159

Patent

active

055922961

ABSTRACT:
In a exhaust smoke sensor a light emitter generates a light beam which passes through a region containing the exhaust gas to a first light sensor. To reduce interference the light emitter is driven by a near square wave signal produced by passing a square wave through a low pass filter.

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