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Electrical sensing circuitry for particle analyzer - has feedback linking power and sensing electrodes to eliminate electrolyte conductivity effects
Electrical sensing circuitry for particle analyzer - has feedback linking power and sensing electrodes to eliminate electrolyte conductivity effects
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机译：颗粒分析仪的电传感电路-具有反馈链接电源和传感电极以消除电解质电导率影响
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摘要
The particle analyser has a microscopic aperture-defined sensing zone separating two bodies of electrolyte and particles in the electrolyte are caused to pass through the sensing zone. A first pair of sensing electrodes and a second pair of power electrodes are positioned with one electrode of each pair being on opposite sides of the aperture. A feedback circuit measures the contstant DC voltage component between the sensing electrodes and feeds same back to the power electrodes, to cause the analyser to be independent of power electrode polarisation. The connections to the sensing electrodes permit only negligible current to flow in them and thereby minimise their polarisation.
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