Technical Specifications CO Sensor: Environmentally friendly electrochemical gas sensor Range: 0~100ppm, or other (0~400ppm) Accuracy: <±5%@ 0~400ppm Temperature Sensor: High-precision thermistor Range: 0~50℃ Accuracy: ±0.5℃@25℃(≥1m/s airflow) Output: 4~20mA (three-wire), 0~10VDC, RS485/Modbus OUT1: T, OUT2: CO Relay: 2×SPST, 1A/30VDC, 0.5A/125VAC Response Time: ≤ 60s Load: ≤500Ω (current type), ≥2KΩ (voltage type) Power Supply: 15~28VAC/15~36VDC Display & Buttons: CMW optional large-screen LCD digital display and buttons Operating Environment: -10~60℃ (continuous)/-40~70℃ (intermittent), 0~95%RH (non-condensing) Housing Material: Flame-retardant ABS Protection Rating: IP30 (CMW), IP65 (CMD) Certification: CE Selection Table CMW Indoor CO Transmitter/Controller Model CMD Duct-type CO Transmitter/Controller 1 4~20mA/0~10VDC Output B 4~20mA/0~10VDC, RS485/Modbus 0 0~100ppm/0~50℃ Range 7 Other (0~400ppm/0~50℃) Relay 0 None Output 1 Yes, 2×SPST 0 None 1 LCD LCD& MMI (CMW) 2 MMI CMW CMD