Do not inhale current Self -calibration cycle The first self -calibration cycle after calling is 24 hours, and the calibration cycle is after the calibration cycle model: MTP50-A Measure gas type: C Measurement principle: NDIR Measurement concentration range: 400ppm-5000ppm Measuring interval: 2 seconds measurement accuracy: (50ppm +5%of reading Response time: T90 time is 90 seconds Operating temperature range: 0-50C Operation humidity range: 0-90%RH Non Condenset Storage temperature range: -20C-60C Power supply requirements: 4.2V-5.5V Current consumption: 300mA current, 4mA normal working current, 13mA average working current life: 10+ years Communication Interface: UART /LIC Pwm output PERIOD: 1004ms, Pulse: 2ms-1002ms (0-5000ppm) Alarm output: Concentration Greater than1000ppm output 1, concentration Less than800ppm output 0, pins are the output mode of the leakage, Material: Metal colour: As Shown Package Contents: 1 x CO2 sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.