Pyroelectric gas sensor

Details Pyroelectric gas sensor Pyroelectric gas sensor

1982-09-28

1985-11-05

Turk, Arnold

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

374 45, 422 69, 422 88, 422 90, 422 95, 435288, 435291, 435807, 436147, 436151, 436152, C12Q 100, G01N 2532, G01N 2548

Patent

active

045514259

ABSTRACT:
A pyroelectric substrate is provided with a heater and at least one set of electrodes for sensing charge redistributions due to changes in the substrate temperature. In a preferred embodiment, there are two interdigitated electrodes, one coated with an absorber/desorber material. The heater pulsatingly raises the temperature of the substrate past the desorption temperature of a fluid of interest. If the fluid was exposed to the absorber/desorber material prior to heating, a portion of the fluid will have been absorbed. When the substrate reaches the desorption temperature, additional heat pulses will not increase the substrate temperature significantly until the fluid has desorbed. Thus, heat used in changing state does not raise the substrate temperature and, lacking a temperature change, reduces the charge redistribution sensed by the electrode coated with the material. Its output is compared with the uncoated electrode (whose temperature continues to rise) and the difference is equal to the amount of fluid desorbed and the temperature is indicative of the species of fluid desorbed.

REFERENCES:
patent: 3467501 (1969-09-01), Groszek
patent: 3519924 (1970-07-01), Burton
patent: 3861879 (1975-01-01), Taylor
patent: 4021307 (1977-05-01), Mosbach
patent: 4045178 (1977-08-01), Okinaka et al.
patent: 4332157 (1982-06-01), Zemel et al.
Zemel et al., "Sensors and Actuators", 1, (1981), 427-473.

Affiliated with

Also associated with

Rating

Pyroelectric gas sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-295938