G - Physics – 01 – N
Patent
G - Physics
01
N
340/147, 341/38,
G01N 15/02 (2006.01) G01N 15/06 (2006.01) G01N 27/60 (2006.01) G01N 27/62 (2006.01)
Patent
CA 1212261
APPARATUS AND METHOD FOR MEASURING THE CONCENTRATION OF PARTICLES IN A GAS Abstract of the Invention The invention provides an apparatus and method for measuring the concentration of particles in a gas using an electrode disposed within but electrically insu- lated 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 concen- tration 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 up-stream of the electrode to charge the particles in the gas.
452854
Albrechtson Loren R.
Reif Robert B.
Battelle Development Corporation
Fetherstonhaugh & Co.
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