... ¨ Features u Real-time detecting CO2 level. u NDIR infrared CO2 module inside with ... L” series with 6 lights indicates CO2 level and makes CO2 level show clearly. u Provide a special model ... Approval u For duct probe CO2 transmitter, and CO2+ Temp.+ RH 3 in 1 transmitter, please see our other products ... Modbus RS485 interface F2000TSM-CO2-L110-V-02 CO2 transmitter and indication, 1x 0~10VDC output, 1X on/ ...