Sell [extremewellknown 0716] MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor NDIR best price

Welcome to our store extremewellknown,wish you have a good shopping. If you need documents about this product, please contact us. Thank you The MH-Z19C carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose intelligent small sensor that uses the principle of non-dispersive infrared (NDIR) to detect the presence of C02 in the air. And other features; built-in temperature compensation: simultaneously has serial output, PWM output, easy to use. The sensor is a high-performance sensor made by closely combining mature infrared absorption gas detection technology with sophisticated optical circuit design and sophisticated circuit design. Product parameters: Detection gas: carbon dioxide Power supply voltage: DC (5.0 ± 0.1) V Average current: 40mA (@5V power supply) Peak current: 125 to (@5V power supply) Interface level: 3. 3v (compatible with 5v) Measuring range: 400-5000PPM optional Output signal: serial UART (TL level 3.3V) Warm-up time: 1min Response time: T90 120s Working temperature: -10-50degree Working humidity: 0~95%RH (no condensation) Pin description: Vin: Power +(in) GND: power supply-(GND) PWM: PWM Hd: HD (zero calibration, low level is effective for more than 7 seconds) Rx: UART (RXD) TTL level data input Tx: UART (TXD) TTL level data output Output method: PWM output Assume the measurement range is 400-2000ppm CO2: Concentration output range: 400-2000ppm Period: 1004ms±5% High level output at the beginning of the cycle: 2ms (theoretical value) Central period: 1000ms±5% Low level output at the end of the period: 2ms (theoretical value) Calculation formula for obtaining current CO2 concentration value by PWM: Cppm=2000X (TH-2ms)/(TH+TL-4ms) Cppm: CO2 concentration value calculated by the unit of ppm TH: the time when the output is high level in one output cycle TL: the time when the output is low in one output cycle