Multiple particle sensors in a particle counter
First Claim
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1. A particle counting instrument comprising:
- at least two particle sensors, each comprising;
at least one light source focused into a beam;
at least one photo-detector in spatial proximity to the beam, where the photo-detector detects changes in light as airborne particulates pass through the beam;
at least one amplifier in communication with the photo-detector, the amplifier converts signals from the photo-detector into electrical pulses;
at least one threshold comparator that provides an output count pulse when the photo-detector pulse exceeds a configurable threshold voltage, the output count pulse representing a particular particle size channel; and
at least one particle counter that accumulates the output pulse counts from the at least one threshold comparator,wherein the particle sensors have separate airstreams, andwherein at least one of the separate airstreams is through tubing to provide sampling of environments other than that of the particle counting instrument.
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Abstract
An airborne, gas, or liquid particle sensor with multiple particle sensor blocks in a single particle counter. Each sensor would sample a portion of the incoming airstream, or possibly a separate airstream. The various counters could be used separately or in concert.
32 Citations
4 Claims
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1. A particle counting instrument comprising:
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at least two particle sensors, each comprising; at least one light source focused into a beam; at least one photo-detector in spatial proximity to the beam, where the photo-detector detects changes in light as airborne particulates pass through the beam; at least one amplifier in communication with the photo-detector, the amplifier converts signals from the photo-detector into electrical pulses; at least one threshold comparator that provides an output count pulse when the photo-detector pulse exceeds a configurable threshold voltage, the output count pulse representing a particular particle size channel; and at least one particle counter that accumulates the output pulse counts from the at least one threshold comparator, wherein the particle sensors have separate airstreams, and wherein at least one of the separate airstreams is through tubing to provide sampling of environments other than that of the particle counting instrument. - View Dependent Claims (2, 3, 4)
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Specification