Dwyer CDWP-05H-C1 is a carbon dioxide transmitter with a temperature range of 32 to 122°F (0 to 50°C). It has a high accuracy of ±40 PPM + 3% of reading (2000 PPM), ±50 PPM + 5% of reading (5000 PPM), and ±50 PPM + 10% of reading (10000 PPM). The transmitter operates with a power requirement of 16-35 VDC or 19-28 VAC and has a response time of 300 s (t63) for 2000 and 5000 PPM and 2 min for 90% step change for 10000 PPM. The CO2 range is 0 to 2000, 0 to 5000, or 0 to 10000 PPM depending on the model. It has an enclosure rating of IP54 and utilizes an NDIR sensor. The humidity range is 10 to 95% RH for 2000 and 5000 PPM and 0 to 85% RH for 10000 PPM. The transmitter offers current output of 4-20 mA, voltage output of 0-5 VDC or 0-10 VDC, and consumes an average power of 2 w with a peak power of 3.75 w. It has a non-linearity of 16 PPM for 2000 and 5000 PPM, while non-applicable for 10000 PPM. The temperature dependence is ±8 PPM/°C at 1100 PPM for 2000 and 5000 PPM, while non-applicable for 10000 PPM. The pressure dependence is 0.13% of reading per mm of Hg for 2000 and 5000 PPM, while non-applicable for 10000 PPM. It can only be mounted vertically with electrical connections pointing downwards.