Apparatus and method for measuring the concentration of particle

Details Apparatus and method for measuring the concentration of particle Apparatus and method for measuring the concentration of particle

1983-05-02

1985-07-30

Kreitman, Stephen A.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

73 28, 60 39091, 123198D, 340627, G01N 1500

Patent

active

045314861

ABSTRACT:
The invention provides an apparatus and method for measuring the concentration of particles in a gas using an electrode disposed within but electrically insulated from an electrically-conductive conduit member, a current measuring device and means for maintaining the conduit member and the electrode at substantially the same potential. Flow of gas containing charged particles along the conduit induces a current passing from the electrode through the current measuring device. If the concentration of particles in the gas becomes excessive, the current measuring device activates a warning device or takes other action to prevent damage to any gas-consuming device attached to the apparatus. The apparatus might include an optional ionizer upstream of the electrode to charge the particles in the gas.

REFERENCES:
patent: 2491445 (1949-12-01), Cunningham et al.
patent: 3503704 (1970-03-01), Marks
patent: 3775763 (1973-11-01), Couch et al.

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