Dwyer CDTV-2D404 Carbon Dioxide Transmitter is a reliable and accurate gas monitoring solution. With a temperature range of 32 to 122°F, it offers precise readings of CO2 levels with an accuracy of ±40 ppm ±3% of reading. It has a response time of 2 minutes for 99% step change and a range of 0 to 2000 or 0 to 5000 ppm for CO2. The transmitter is encased in a durable NEMA 4X (IP66) housing for duct mount or IP20 for wall mount. It utilizes a single-beam, dual-wavelength NDIR sensor for CO2 and a MEMS metal oxide semiconductor for VOCs. The output options include current, voltage, and relay, making it adaptable to various systems. With low power consumption, non-linearity of 16 ppm, and pressure dependence of 0.13% per mm of Hg, it provides reliable and efficient gas monitoring in a broad velocity range of 0-4000 FPM (20.32 m/s).