ELECTROCHEMICAL GAS DETECTOR

PURPOSE:To flow an electrolyte to the electrode surface without using a string-shaped liquid-guiding member through the electrode. CONSTITUTION:In an electrochemical gas detector for detecting the concentration of a gas to be detected as an electrolytic current by allowing at least an action pole and an opposite pole to contact an electrolyte, a water-containing plate 5 is allowed to contact an electrode surface 2b of an electrode boy 2 which becomes the action pole and is housed in a container 1 by enclosing in sandwich with the water-containing plates 4 and 5 for contacting at both front and rear surfaces of the electrode body 3 which becomes the opposite pole and the periphery part. An electrolyte is sucked via the water-containing plate 4 and the electrolyte is routed to the water-containing plate 5 which exists between the electrode bodies 2 and 3 from the periphery part of the water-containing plate 4, thus causing the electrode surfaces 2b and 3b of both electrode bodies 2 and 3 to contact the electrolyte and generating art electrolytic current corresponding to the concentration of the gas. Then, when the electrolyte is included in the water-containing plates 4 and 5, gas can be detected and the electrolyte in the container can be reduced as much as possible, thus absorbing the increase and decrease in the electrolyte due to moisture at a space which is generated in the container.