Features: 1) Multiple functions, high performance, low price, make it praiseworthily.

2) Wall mounting, LCD display, real-time detecting CO2 concentration, temperature and %RH (humidity detection is optional)

3) America Telaire's NDIR infrared CO2 module inside and supply three detection range to select for almost all application.

4) 15 years lifetime of CO2 sensor 5) Also as transmitter of CO2 or as the controller of CO2, temperature and humidity

 6) Microprocessor control, quickly response, high precision

7) Providing up to three 0~10V analog output or up to three relay dry-contact outputs

8) Analog output with two alternatives: linearized over full range output or PID control output

9) Different control modes can be easily selected by users, such as mode for ventilation, greenhouse or other applications.

10) Special design for greenhouse: day and night brightness detection and auto working mode change over automatically

11) Locale adjustable range CO2: 0~20,000 ppm or 0~50,000, temperature: 5~45C, humidity: 5~95%RH

12) ABC Logic with patented Self Calibration Algorithm makes end users use it for 15 years without calibration amending. That is suitable for where concentrations will drop to outside ambient conditions (about 400ppm) at least 3 times in a 14-day period

13) RS-485 communication interface, 15KV antistatic protection, independent base address setting

14) Duct type is optional 15) CE-Approval We also have other IAQ products, like CO, O3, VOC monitor/ controller,please contact us for more detailed information.