GD250W4E Honeywell CO Sensor Brand Honeywell Model No. GD250W4E Gas Detected Carbon monoxide (CO) Sensing Range 0 ~ 250 ppm Wiring 4 wire Sensor type Semiconductor Detect range 0~250ppm Warm-up time Minimum 2 hours Power supply 24Vac, 24Vdc Output signal 2~10Vdc or 4~20mA Response time Within 5 min. Operating temperature -10 ~ 50 C. Operating Humidity 10 ~ 95%RH (no condensing) Storage temperature -10 ~ 60 C Storage Humidity 10 ~ 95%RH (no condensing) Accuracy +- 10% FS @25C. 50%RH for 150~250ppm #GD250W4E #Honeywell CO Sensors #Honeywell Sensors