Description
MH-Z19B carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose smart small-scale sensor that uses non-dispersive infrared (NDIR) principle to detect the presence of CO2 in the air, with good selectivity and anaerobic Gas dependence, long life and other characteristics. built-in temperature compensation. at the same time with serial output, analog output and PWM output, easy to use. The sensor is a high-performance sensor that combines mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit designmeters:Product model number: MH-Z19BGas Detection: Carbon DioxideSupply voltage: 4.5~5.5V DCAverage current: Peak current: 150 mA (@5V supply)Interface level: 3.3V (5V compatible)Measurement range: 0~10000ppm can be selected within the rangeWarm-up time: 3minResponse time: T90Working temperature: 0ï½50°COperating Humidity: 0 to 95% RH (non-condensing)Characteristicsï¼Gas chamber with gold plating, waterproof and corrosion resistantHigh sensitivity, low power consumptionExcellent stabilityTemperature compensation, excellent linear outputProvides serial (UART), analog (DAC), PWM waveform output methodslong lastingWater vapor interference, not poisoningApplications:HVAC refrigeration equipmentAir quality monitoring equipmentFresh air systemAir purification equipmentSmart homeSCHOOLVin: Power Positive (Vin)GND: Negative Power Supply (GND)Vo: Analog outputPWM: PWMHD: HD (zero for school, low for more than 7 seconds)Rx: UART(RXD) TTL Level Data InputTx: UART (TXD) TTL level data outputPin 1: Analog Output VoPin 2: NonePin 3: Negative Power Supply (GND)Pin 4: Positive Power Supply (Vin)