Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting
Patent
1986-07-31
1988-06-21
Goldberg, E. A.
Electrical resistors
Resistance value responsive to a condition
Gas, vapor, or moisture absorbing or collecting
338 13, 73 23, 73 26, 29592R, H01L 700
Patent
active
047527617
ABSTRACT:
A thermo-electrically regulated adsorptive sensing device comprising a gas adsorptive sensing element having a stratum of adsorbently sensitive particles, a thermistor for sensing the temperature of the sensing element, a thermo-electric module for controlled cooling and heating of the sensing element, a heat sink, and a controller unit for applying variable amounts of electrical current through the thermo-electric module to appropriately heat or cool the sensing element in a rapid, controlled and accurate fashion. The thermo-electric module may be operated either to maintain the stratum of particles of the sensing element within about 1.degree. (0.6.degree. C.) of the optimal sensing temperature or operated to heat the particles in a controlled fashion to a relatively high purging temperature at which the gas is relatively rapidly desorbed, and then cool the particles in a controlled fashion to a relatively lower sensing temperature at which the gas is relatively rapidly adsorbed by the particles.
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Dolan James P.
Dolan Patrick M.
Goldberg E. A.
Lateef M.
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