Steam-sterilizable carbon dioxide sensor

Details Steam-sterilizable carbon dioxide sensor Steam-sterilizable carbon dioxide sensor

1983-01-25

1984-07-17

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

G01N 2730, G01N 2756

Patent

active

044604513

ABSTRACT:
A carbon dioxide sensor for measuring dissolved carbon dioxide or carbon dioxide in gas is sterilizable with steam under pressure at a temperature of 120-130 degrees Celsius. The sensor comprises an outer tube having on its one end a gas-permeable membrane and a pH electrode disposed in the outer tube and supporting a spacer of poor hydrophobicity positioned between the distal end of the electrode and the membrane. For measurement of carbon dioxide, a liquid containing sodium bicarbonate is poured into the outer tube to form a layer of electrolyte at the spacer, and the outer tube is mounted on a fermentor. The pH electrode can be removed from the outer tube which is attached to the fermentor, and a membrane protecting rod can be inserted into the outer tube for sterilization of the membrane. The gas-permeable membrane can easily be replaced.

REFERENCES:
patent: 3853731 (1974-12-01), Gray et al.
patent: 4012981 (1977-03-01), Jerrold-Jones et al.
patent: 4078981 (1978-03-01), Neti et al.
patent: 4197852 (1980-04-01), Schindler et al.
patent: 4376681 (1983-03-01), Inoue et al.
Beckman, 1134, Glass Electrode Carbon Dioxide Sensor, pp. 1-3, Aug. 1960.

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