G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 23/22 (2006.01) G01F 1/34 (2006.01) G01F 23/28 (2006.01) G01F 23/284 (2006.01) G01N 35/10 (2006.01)
Patent
CA 2658772
A sensor for detecting contact of a fluid delivery probe with a fluid surface and for detecting fluid flow through the probe includes a first electrode disposed along a fluid flow path of the probe upstream from a distal tip of the probe and a second electrode longitudinally spaced and electrically isolated from the first electrode and disposed at the distal tip of the probe. An oscillating signal is transmitted through the first electrode, and at least a portion of the signal is received through the second electrode. Through changes in the received signal due to the distal tip of the probe coming into contact with a fluid surface or due to fluid flow through the conduit between the first and second electrodes, fluid surface contact and fluid flow can be detected. A pressure sensor can be employed to monitor internal fluid pressure within the fluid conduit of the fluid delivery probe as a secondary, redundant means for detecting fluid flow through the conduit.
Jurik Larry
Katz Bernard
Keating Michael
Klengler Stone
Kotlarik John
Gen-Probe Incorporated
Smart & Biggar
LandOfFree
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