H.sub.2 S Direct gas sensor

Details H.sub.2 S Direct gas sensor H.sub.2 S Direct gas sensor

1977-03-18

1978-05-30

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204 1T, G01N 2746

Patent

active

040922324

ABSTRACT:
A combined specific ion and reference electrode structure having an air gap, gas permeable membrane and in which the active, conducting solution has a surface tension and boiling point which are great enough that with equal ambient pressures on both sides of the membrane the active solution will neither leak nor evaporate rapidly through the membrane at the temperature range over which the electrode structure is operated, namely -40.degree. C to 60.degree. C. In the preferred embodiment, the active solution solvent as well as the reference solution solvent are selected from among the class consisting of ethylene glycol, propylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethyleneglycol, hexylene glycol, propylene carbonate, dimethyl sulfoxide and dimethyl formamide.

REFERENCES:
patent: 2278248 (1942-03-01), Darrah
patent: 3227643 (1966-01-01), Okun et al.
patent: 3493484 (1970-02-01), Berg et al.
patent: 3503861 (1970-03-01), Volpe
patent: 3785948 (1974-01-01), Hitchman et al.
patent: 3803006 (1974-04-01), Krueger et al.
patent: 3897315 (1975-07-01), Riseman et al.

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