Item Type: Formaldehyde Sensor Module_x000D_Model: CJ-01-SH22_x000D_Output Data: DAC, 0.4-2V standard voltage signal, and UART output at 3V level. _x000D_Working Voltage: 3.7-9V, with reverse polarity protection. _x000D_Warm Up Time: 3 minutes_x000D_Response Time: 60s_x000D_Recovery Time: 60s_x000D_Sensing Range: 0-5mg/m3_x000D_Resolution: 0.01ppm_x000D_Working Temperature: 0~50_x000D_Working Humidification: 15~90%RH, non condensing. _x000D_Storage Temperature: 0~50 1Smart Sensing: Comes with 0?5mg/m3 testing range and 0.01ppm resolution, this sensor module can detect the formaldehyde in air. 2Varied Output: Allows for DAC 0.4?2V standard voltage signal, UART output at 3V level, PWM, analogue voltage signal and so on. 3Reliable Work: High in sensitivity and low in power consumption, also has reverse polarity protection for safe and stable works. 4Practical Use: Enables wide application on air quality sensor, ventilation system, air conditioner, etc., useful and reliable. 5Easy to Install: Designed to have a light weight and a compact size as well, the installation is very convenient with a cable. 1 x Formaldehyde Sensor Module 1 x Cable