Figaro tgs 5042 carbon monoxide gas sensor battery operable figaro tgs 5042 an electrochemical sensor designed to detect carbon monoxide gas the sensor is capable of being battery operated making it ideal for use in hand held detectors the sensor has low sensitivity to interference gases and there is no risk of electrolyte leakage there is a linear relationship between co gas concentration and sensor output and the sensor has high repeatability and accuracy typical applications include r