Flow monitored particle sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 12, 2014
Grant Date -
Sep 6, 2012
app pub date -
Aug 24, 2010
filing date -
Aug 24, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided are devices and methods for monitoring flow rate in aerosol particle counters. The particle sensor has a particle counter, a flow measurement orifice comprising a differential pressure sensor for measuring differential pressure (DP) across the flow measurement orifice during particle sensor operation and a critical flow orifice. A vacuum source pulls ambient gas through each of the particle counter, flow measurement orifice and critical flow orifice. An atmospheric pressure sensor measures atmospheric pressure (AP) and a bench pressure sensor measures pressure in the particle sensor (BP). The output from the sensors is used to identify a flow condition, such as by a monitor operably connected to each of the differential pressure sensor, atmospheric pressure sensor and bench pressure sensor. In this manner, deviation in flow rate from a target flow rate is readily monitored without the need for expensive sensors or other flow-controlling components.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 43 Citation Count
- G01F Class
- 98.35 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 12, 2026 |
