{"product_id":"mh-z19-mh-z19z-mh-z19c-ir-infrared-sensor-module-co2-carbon-dioxide-gas-digital-sensor-ndir-for-co2-monitor-400-5000ppm-uart-pwm","title":"MH-Z19 MH-Z19Z MH Z19C IR Infrared Sensor Module CO2 Carbon Dioxide Gas Digital Sensor NDIR for CO2 Monitor 400-5000ppm UART PWM","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSZFYDOSH\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaterial\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMixture\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOutput\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eDigital Sensor\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eTheory\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eInductance Sensor\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eGas Sensor\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eUse\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eGas Sensor\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eis_customized\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv style=\"font-size:13px\"\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eThe 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.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"color:rgb(255, 0, 0)\"\u003e\u003cu\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eProduct parameters:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eDetection gas: carbon dioxide\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePower supply voltage: DC (5.0 ± 0.1) V\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eAverage current: \u0026lt;40mA (@5V power supply)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePeak current: 125 to (@5V power supply)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eInterface level: 3. 3v (compatible with 5v)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eMeasuring range: 400-5000PPM optional\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eOutput signal: serial UART (TL level 3.3V)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eWarm-up time: 1min\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eResponse time: T90\u0026lt; 120s\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eWorking temperature: -10-50degree\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eWorking humidity: 0~95%RH (no condensation)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"color:rgb(255, 0, 0)\"\u003e\u003cu\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePin description:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eVin: Power +(in)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eGND: power supply-(GND)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePWM: PWM\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eHd: HD (zero calibration, low level is effective for more than 7 seconds)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eRx: UART (RXD) TTL level data input\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eTx: UART (TXD) TTL level data output\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eOutput method:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan style=\"color:rgb(192, 0, 0)\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePWM output\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eAssume the measurement range is 400-2000ppm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eCO2: Concentration output range: 400-2000ppm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePeriod: 1004ms±5%\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eHigh level output at the beginning of the cycle: 2ms (theoretical value)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eCentral period: 1000ms±5%\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eLow level output at the end of the period: 2ms (theoretical value)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eCalculation formula for obtaining current CO2 concentration value by PWM: Cppm=2000X (TH-2ms)\/(TH+TL-4ms)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eCppm: CO2 concentration value calculated by the unit of ppm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eTH: the time when the output is high level in one output cycle\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eTL: the time when the output is low in one output cycle\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;text-align:center;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cimg style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S9efd50c8778748a0833e460a03865f37p.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan style=\"color:rgb(192, 0, 0)\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eSerial output (UART)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003eHardware connection, connect the sensor's Vin-GND-RXD-TXD to the user's 5V-GND-TXD-RXD. (User terminal must use TTL level)\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;text-align:center;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cimg style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S23019806ee764e4286b01fecaf5b2d75p.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"color:rgb(255, 0, 0)\"\u003e\u003cu\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003ePrecautions:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e1. In the process of welding, installation and use of the sensor, the gold-plated plastic cavity should be prevented from withstanding pressure in any direction.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e2. If the sensor needs to be placed in a small space, this space should be well ventilated, especially the two diffusion windows should be in a well ventilated position.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e3. The sensor should be far away from the heat source, and avoid direct sunlight or other heat radiation.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e4. The sensor should be calibrated regularly, and the calibration period is recommended to be no more than 6 months.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e5. Do not use the sensor for a long time in the environment with high dust density.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e6. In order to ensure that the sensor can work normally, the power supply voltage must be maintained at (5.0 ± 0.1) VDC. The power supply current must not be less than 150mA\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e7. If it is not within this range, the sensor may be faulty, the output concentration of the sensor is low or the sensor cannot work normally.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e8. When manually calibrating the zero point or sending the command to calibrate the main points, it must be stable\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e9. Work continuously for more than 20 minutes in a gas environment (400ppm).\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e10. The sensor is prohibited to use wave peak depth.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e11. When welding with iron, set the temperature to (350±5) degree, early\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e12. The pick-up time must be less than 35.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"font-size:14px;color:#000000;margin:0px;padding:0px;\";box-sizing:content-box'\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cspan\u003e\u003cspan style='font-family:\"margin:0px;padding:0px;\"'\u003e13. When using the sensor, it is recommended that the customer use the method of inserting the solder bump to directly insert and remove the sensor for toilet maintenance.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cimg style=\"width:800px\" width=\"800px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sa4fee0b8bfef4dfba24a7a7a76bd14cdu.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:800px\" width=\"800px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Se20068f2ba904c85a15363c9e8663d2d7.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:800px\" width=\"800px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S4dbb4bdf021a4f98a45e59b34da24c54L.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:800px\" width=\"800px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sdc713ee3b15448b0977d5bfc2f8312b68.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:800px\" width=\"800px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S3a8b71d2b2b44648aa5e00e4e36f7649m.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"400-2000PPM pin","offer_id":55419860058411,"sku":"14:173#400-2000PPM pin","price":118.04,"currency_code":"USD","in_stock":true},{"title":"400-5000ppm","offer_id":55419860091179,"sku":"14:29#400-5000ppm","price":118.04,"currency_code":"USD","in_stock":true},{"title":"400-5000PPM pin","offer_id":55419860123947,"sku":"14:175#400-5000PPM pin","price":118.04,"currency_code":"USD","in_stock":true},{"title":"400-2000PPM","offer_id":55419860156715,"sku":"14:10#400-2000PPM","price":118.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/Seabbde96b0b34e4e955bf0b70639dc5aa.webp?v=1788495468","url":"https:\/\/yoeruyo.com\/products\/mh-z19-mh-z19z-mh-z19c-ir-infrared-sensor-module-co2-carbon-dioxide-gas-digital-sensor-ndir-for-co2-monitor-400-5000ppm-uart-pwm","provider":"Yoeruyo","version":"1.0","type":"link"}