资源介绍
Alphasense toxic gas sensors are three electrode amperometric electrochemical cells.
The working electrode either oxidises or reduces the target gas with the counter electrode balancing the generated current.
The reference electrode anchors the working electrode at the correct potential to ensure that it stays in the transport limited current plateau of the current-voltage curve.
Good design of a potentiostatic circuit will minimise current transients by keeping the working electrode at a stable potential.
The current path to the counter electrode and generated by the working electrode is provided by metal strips; the ionic current between the counter and working electrodes is transported by the electrolyte.