Fluid detector

Details Fluid detector Fluid detector

2008-09-02

2010-06-22

Verbitsky, Gail (Department: 2855)

Thermal measuring and testing

Thermal testing of a nonthermal quantity

C374S183000, C374S148000

Reexamination Certificate

active

07740402

ABSTRACT:
A detector and a method for determining the presence of a fluid are disclosed. The detector comprises a probe having a thermistor with the probe being arranged to be exposed to a fluid and to allow thermal flow between the thermistor and the fluid, a temperature sensor for measuring the temperature of the thermistor and a controller. The controller is arranged to supply electrical power to the thermistor when it is below a predetermined temperature to heat it up and to turn off the supply of electrical power to the thermistor when it is at or above the predetermined temperature. The presence or identity of a fluid exposed to the probe is determined based on the proportion of time that power is supplied to the thermistor to maintain it substantially at the predetermined temperature. The ambient temperature of the fluid to which the probe is exposed may also be measured and electrical power may be supplied to the thermistor to keep it substantially at a predetermined temperature above the measured ambient temperature.

REFERENCES:
patent: 3803913 (1974-04-01), Tracer
patent: 4043196 (1977-08-01), Trageser
patent: 5339687 (1994-08-01), Gimson et al.
patent: 6681625 (2004-01-01), Berkcan et al.
patent: 7013714 (2006-03-01), Lin
patent: 2003/0225544 (2003-12-01), Ismail et al.
patent: 2007/0146149 (2007-06-01), Abe et al.
patent: 2008/0066541 (2008-03-01), Burton
patent: WO 90/09567 (1990-08-01), None
patent: WO 02/21055 (2002-03-01), None
Database WPI Week 1996. Thomson Scientific, London, GB. XP-0024793909, Jun. 7, 1996, XP-002473909.

Affiliated with

Also associated with

Rating

Fluid detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluid detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4206647