发明名称 |
Method and apparatus for zero calibration of oxygen-sensing polarographic devices |
摘要 |
The calibration of a polarographic oxygen sensor (20) at zero oxygen concentration is accomplished by providing an oxygen-free liquid environment at the sensor active surface. This is accomplished electrolytically by depleting a thin film of electrolyte (24) of oxygen to zero concentration with an oxygen-reducing cathode (6), and complementary anode (4), connected via a battery (10) and switch (12). The sensor (20) is placed into close proximity with the electrodes (4,6) and the oxygen in the electrolyte (24) reduced while its concentration is measured by the sensor (20). A low steady-state signal for the sensor provides the zero oxygen concentration calibration point.
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申请公布号 |
US4541901(A) |
申请公布日期 |
1985.09.17 |
申请号 |
US19840603718 |
申请日期 |
1984.04.25 |
申请人 |
NOVAMETRIX MEDICAL SYSTEMS, INC. |
发明人 |
PARKER, DAWOOD;DELPY, DAVID T. |
分类号 |
G01N27/416;G01N27/49;(IPC1-7):G01N27/46 |
主分类号 |
G01N27/416 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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