Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1986-06-18
1987-10-06
Lacey, David L.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 98, 60276, 123489, 204406, 204412, 204425, G01N 2700, G01N 2726, G01N 3096
Patent
active
046982094
ABSTRACT:
An oxygen concentration sensing device for sensing an oxygen concentration in a gaseous body includes a pair of solid electrolyte members having oxygen ion permeability which are arranged to face each other forming a predetermined gap portion between them. Each of the solid electrolyte members is provided with a pair of electrodes and one of the solid electrolyte members is operative as an oxygen pump element when a drive current is supplied across the electrodes thereof and the other one of the solid electrolyte members is operative as a sensor cell element for producing a sensor output signal. The sensing device is provided with a current supply circuit for supplying the drive current of the oxygen pump element and a delay control circuit for delaying the increase of the magnitude of drive current of the oxygen pump element at a start time, so as to prevent an overcurrent to the oxygen pump element which otherwise is generated by the current supply circuit and causes the so called blackening phenomenon of the solid electrolyte members.
REFERENCES:
patent: 4578171 (1986-03-01), Yamada et al.
patent: 4594139 (1986-06-01), Asayama et al.
patent: 4601809 (1986-07-01), Kitahara
Hashimoto Kenshiro
Okada Yasushi
Bennett Floyd
Honda Giken Kogyo Kabushiki Kaisha
Lacey David L.
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