Top Pick Dwyer CDTR-5D404 Carbon Dioxide/Rh/Temperature Transmitter

Dwyer CDTR-5D404 is a Carbon Dioxide/Rh/Temperature Transmitter with a temperature range of 32 to 122°F (0 to 50°C). It has an accuracy of ±40 PPM + 3% of reading (CO2) and ±2% (RH). The transmitter requires 16 to 35 VDC/19 to 28 VAC power and has a response time of 2 minutes for 99% step change. It has an enclosure rating of NEMA 4X (IP66) for duct mount and IP20 for wall mount. The transmitter is equipped with a single-beam, dual-wavelength NDIR sensor and has a humidity range of 10 to 95% RH (non-condensing). Output options include current, voltage, relay, and RTD or thermistor. The average power consumption is 2 watts with a peak of 3.75 watts. The transmitter has a non-linearity of 16 PPM and a temperature dependence of ±8 ppm/ °C at 1100 PPM. Pressure dependence is 0.13% of reading per mm of Hg and it can measure air velocity in the range of 0-4000 FPM (20.32 m/s).