The Telaire T303122K24P Industrial CO2 Sensor, Dual Channel, 0 - 2000 PPM, 0 to 10 VDC o/p, Potted is a Carbon Dioxide (CO2) Sensor designed to meet the specific needs of customers who require measuring CO2 in harsh or difficult environments. Based on a series of modules, the casing offers a number of combinations to meet the needs of range, supply voltage, and output type in various applications. Example applications include incubators, buses, refrigerators, subway stations, and railway carriages.