Rki-instruments RX-517 User Manual download pdf (Page 35)

PT0E-0730

１１−３．ELECTRO-CHEMICAL CELL method

This gas detector applies an electrochemical sensor. The sample gas is electrolyzed by the

electrolyzed cell added with specific electric potential (bias voltage) and detected from the

electrolyzed current generated at that time.

The electrochemical sensor is designed to keep the interface between electrode and electrolyte

at a constant potential (Bias voltage) and is the method to electrolyze gas directly. Then as

the gas has the bias voltage generating its own electrolization (Rrdox reaction) the bias voltage

of sensor is determined by the redox potential.

電解液

Ｒ（抵抗）

参照電極

対極

作用電極

気体透過膜

Gas in

Gas out

構造図

ポテンショスタット回路

PS circuit

GPF

Figure

Solution

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Rki-instruments RX-517 User Manual Page 35