MH-Z19 MH-Z19E Infrared CO2 Sensor Module NDIR Carbon Dioxide Gas Sensor for CO2 Monitor 400-5000Ppm UART PWM MH-Z19E Carbon Dioxide Gas Sensor (hereinafter referred to as Sensor) is an intelligent small general-purpose sensor. It has two products: pin and terminal. It uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air, and has good selectivity. No oxygen dependency, long service life, etc. The sensor is a high-performance sensor that closely combines mature infrared absorption gas detection technology with precise optical circuit design and sophisticated circuit design. High sensitivity, low power consumptionExcellent stabilityTemperature compensation, excellent linear performanceProvide serial port (UART), PWM waveform and other output methodsLong time water vapor interference, no poisoningApplication:HVAC equipmentAir quality monitoring equipmentFresh ventilation systemAir purification equipmentSmart homeSchoolsParameters:Product model: MH-Z19EWgas capping: carbon dioxidePower supply voltage: DC(5.0+/-0.1)AVavg/current: less than 40mA (at 5V supply)Peak Current: 125 mA (at 5V supply)Interface Level: 3.3V (5V compatible)Measurement Range: 400 - 5000ppm optionalOutput signal: serial port (UART) (TTL level 3.3V); PWM Warm-up Time: 1min Response Time: T90 less than 120s Operating Temperature: -10 °C - 50 °C Storage Temperature: -20 °C - 60 °C Operating Temperature: 0 - 95% RH (non-condensing) Type: A: Row Pin / B: TerminalColor: as shown Material: PC+Metal Package Contents: 1 x Infrared CO2 Sensor Module mh-z19e Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.