Temperature control system

Details Temperature control system Temperature control system

1982-06-08

1984-09-18

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

204408, 123440, G01N 2726

Patent

active

044716486

ABSTRACT:
A temperature control system is disclosed wherein a heater of a gas sensor and a plurality of reference resistors cooperate to form a bridge circuit. The temperature control system comprises a comparator means for monitoring a balancing voltage of the bridge circuit and generating a control signal indicative of the balancing voltage and an electric power amplifier means responsive to the control signal for varying a voltage applied to the bridge circuit in such a manner to reduce the balancing voltage. The gas sensor has mounted therein at least one of the plurality of reference resistors, which reference resistor having a resistance resulting from multiplying the resistance of the heater with a constant.

REFERENCES:
patent: 4332225 (1982-06-01), Cox et al.
patent: 4359030 (1982-11-01), Sone et al.
patent: 4365604 (1982-12-01), Sone
Journal of Physics E, vol. 10, No. 9, Sep. 1977, pp. 881-883 by Beigang et al., "A Reliable, Low-Cost, Temperature-Controlled Oven".

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