{"product_id":"bt-531g-co2-monitor-air-quality-meter-ndir-sensor-0-10000ppm-temperature-humidity-type-c-2000mah","title":"BT-531G CO2 Monitor Air Quality Meter NDIR Sensor 0-10000ppm Temperature Humidity Type-C 2000mAh","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eApplication Scenarios\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eIndustrial Grade\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBattery Capacity\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e2000mAh\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBattery Included\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eHoldPeak\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBuzzer Alarm\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes (built-in)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCharging Interface\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eType-C USB\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDIY Supplies\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eElectrical\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDisplay\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e84 x 69mm big screen VA LCD\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 1\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNDIR (Non-Dispersive Infrared) sensor for high accuracy\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 10\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eABS plastic housing\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 2\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e4-level air quality indicator with color codes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 3\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e84 x 69mm large VA LCD display\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 4\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eBuilt-in audible alarm for high CO2 levels\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 5\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eType-C fast charging\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 6\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e2000mAh large capacity battery\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 7\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eTemperature and humidity 2-in-1 measurement\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 8\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eHanding hole for portable carrying\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature 9\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eRear bracket for table placement\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eGas Type\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCo2\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\u003eIs Smart Device\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eno\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMeasurement Range\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e0 - 10000 ppm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eBT-531G\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOperating Temperature\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e-10°C - 50°C (14°F - 122°F)\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\u003ePCBincluded\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSemi-finishedproduct\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSensor Type\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNDIR (Non-Dispersive Infrared)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSuitable For\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eOffice, living room, baby room, car, greenhouse, classroom, warehouse, workshop, sauna, farm, school\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCarbon Dioxide Detector\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWith LCD Screen Or Not\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003esemi_Choice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eBT-531G CO2 Monitor – Air Quality Meter with NDIR Sensor, 0-10000ppm, Temperature, Humidity, Type-C Charging, Audible Alarm\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G carbon dioxide detector is a professional indoor air quality monitor for measuring CO2 concentration, temperature, and humidity. It features a high-precision NDIR (Non-Dispersive Infrared) sensor with \u0026gt;10 years lifespan, 4-level air quality classification (Good\/Normal\/Poor\/Serious), built-in audible alarm, 84×69mm large VA LCD display, Type-C charging, and 2000mAh rechargeable battery. Ideal for office, living room, baby room, car, greenhouse, classroom, warehouse, workshop, sauna, farm, and school.\u003cbr\u003e\u003cbr\u003eCore Features:\u003cbr\u003e\u003cbr\u003eCO2 measurement – 0 – 10000 ppm range, 1 ppm resolution\u003cbr\u003e\u003cbr\u003eNDIR sensor – high selectivity, fast response, good stability, high precision\u003cbr\u003e\u003cbr\u003e4-level air quality indicator – Good \/ Normal \/ Poor \/ Serious\u003cbr\u003e\u003cbr\u003eBuilt-in audible alarm – slow beep ≥2000ppm, fast beep ≥5000ppm\u003cbr\u003e\u003cbr\u003eTemperature measurement – -40°C to 80°C \/ -40°F to 176°F (°C\/°F switchable)\u003cbr\u003e\u003cbr\u003eHumidity measurement – 0.1% – 99.9% RH\u003cbr\u003e\u003cbr\u003e84×69mm large VA LCD display – clear and easy to read\u003cbr\u003e\u003cbr\u003eType-C charging port – faster charging\u003cbr\u003e\u003cbr\u003e2000mAh rechargeable battery – built-in, ~4 hours operating time\u003cbr\u003e\u003cbr\u003eHanding hole – easy to carry\u003cbr\u003e\u003cbr\u003eRear bracket – stable table placement\u003cbr\u003e\u003cbr\u003eABS plastic housing – durable\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S49ec08c4a4074d01b92fab08d33f8484m.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eNDIR (Non-Dispersive Infrared) Sensor – High Accuracy \u0026amp; Long Life\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G CO2 meter uses advanced NDIR sensor technology for reliable carbon dioxide detection.\u003cbr\u003e\u003cbr\u003eSensor Feature\tAdvantage\u003cbr\u003eSelectivity\tHigh – specifically detects CO2\u003cbr\u003eResponse speed\tFast – quick readings\u003cbr\u003eSignal-to-noise ratio\tHigh – clean, accurate signal\u003cbr\u003eStability\tGood – consistent performance\u003cbr\u003ePrecision\tHigh – accurate measurements\u003cbr\u003eSensor life\t\u0026gt;10 years – long-term use\u003cbr\u003eCO2 detection specifications:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eCO2 range\t0 – 10000 ppm\u003cbr\u003eCO2 resolution\t1 ppm\u003cbr\u003eDetection accuracy\t±(5% of display + 50ppm)\u003cbr\u003eConformity accuracy\t±20%\u003cbr\u003eSensor type\tNDIR (Non-Dispersive Infrared)\u003cbr\u003eSensor life\t\u0026gt;10 years\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sac4bd14adf8f40f69876ae8c774c54edQ.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003e4-Level Air Quality Classification – Easy to Understand\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G air quality monitor automatically classifies CO2 levels into 4 categories.\u003cbr\u003e\u003cbr\u003eLevel\tCO2 (ppm)\tAir Quality\tIndicator\u003cbr\u003eGood\t0 – 999\t✅ Air quality is good\tGreen\u003cbr\u003eNormal\t1000 – 1999\t⚠️ Air quality is normal\tYellow\u003cbr\u003ePoor\t2000 – 4999\t🔴 Air quality is poor\tOrange\/Red\u003cbr\u003eSerious\t5000 – 9999\t❌ Air quality is serious\tDark Red\u003cbr\u003eCO2 impact on human health (reference):\u003cbr\u003e\u003cbr\u003eCO2 (ppm)\tEffect on People\u003cbr\u003e300 – 450 ppm\tOutdoor air in general\u003cbr\u003e450 – 1000 ppm\tAir is fresh and smooth\u003cbr\u003e1000 – 2000 ppm\tAir becomes turbid, drowsiness\u003cbr\u003e2000 – 5000 ppm\tHeadache, sluggishness, unable to concentrate, heartbeat accelerates, feel sick\u003cbr\u003e\u0026gt;5000 ppm\tBrain injury, lose consciousness, even stun\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sbb7aa6c5a0b44426be54556aa50cf6e4s.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eIntelligent CO2 Warning Alarm – Stay Safe\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G CO2 detector features a built-in buzzer that alerts you when CO2 levels become dangerous.\u003cbr\u003e\u003cbr\u003eCondition\tAlarm\tIndication\u003cbr\u003eCO2 ≥ 2000 ppm (Poor)\tSlow beep\tVentilate the area\u003cbr\u003eCO2 ≥ 5000 ppm (Serious)\tFast beep\tLeave immediately\u003cbr\u003eBenefits of audible alarm:\u003cbr\u003e\u003cbr\u003eNo need to constantly watch the display\u003cbr\u003e\u003cbr\u003eImmediate awareness of dangerous conditions\u003cbr\u003e\u003cbr\u003ePerfect for classrooms, offices, and baby rooms\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S6679399f61374ff1acfe542635d469a8m.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eTemperature \u0026amp; Humidity Measurement – Complete Environmental Monitoring\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G indoor air quality meter measures temperature and humidity alongside CO2.\u003cbr\u003e\u003cbr\u003eTemperature specifications:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eRange\t-40°C – 80°C \/ -40°F – 176°F\u003cbr\u003eResolution\t0.1°C \/ 0.1°F\u003cbr\u003eAccuracy\t±2°C (±3.6°F)\u003cbr\u003eUnit switch\t°C \/ °F (press button)\u003cbr\u003eHumidity specifications:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eRange\t0.1% – 99.9% RH\u003cbr\u003eResolution\t0.1%\u003cbr\u003eAccuracy\t±10.0%\u003cbr\u003e3-in-1 function:\u003cbr\u003e\u003cbr\u003eCO2 concentration\u003cbr\u003e\u003cbr\u003eTemperature\u003cbr\u003e\u003cbr\u003eRelative humidity\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Se16bd5fa74e34d088241e0f9c9b5c448z.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003e84×69mm Big Screen VA LCD – Clear at a Glance\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G CO2 monitor features a large, easy-to-read VA LCD display.\u003cbr\u003e\u003cbr\u003eDisplay Feature\tDescription\u003cbr\u003eScreen size\t84 × 69 mm\u003cbr\u003eDisplay type\tVA LCD (high contrast, wide viewing angle)\u003cbr\u003eInformation shown\tCO2 (ppm), Temperature (°C\/°F), Humidity (%RH)\u003cbr\u003eAir quality indicator\t4-level color-coded bar\u003cbr\u003eBattery indicator\tShows remaining power\u003cbr\u003eDisplay layout:\u003cbr\u003e\u003cbr\u003eCO2 value – large digits (primary focus)\u003cbr\u003e\u003cbr\u003eTemperature – lower left\u003cbr\u003e\u003cbr\u003eHumidity – lower right\u003cbr\u003e\u003cbr\u003eAir quality level – color bar at top\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003e2000mAh Rechargeable Battery – Type-C Fast Charging\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G air quality tester features a built-in 2000mAh lithium battery with Type-C charging.\u003cbr\u003e\u003cbr\u003eBattery specifications:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eBattery type\tBuilt-in 3.7V Lithium battery\u003cbr\u003eBattery capacity\t2000mAh\u003cbr\u003eCharging time\tApprox. 2 hours\u003cbr\u003eOperating time\tApprox. 4 hours\u003cbr\u003eCharging interface\tType-C USB\u003cbr\u003eCharging input\tDC 5V\u003cbr\u003eCharging indicators:\u003cbr\u003e\u003cbr\u003eRed LED – battery charging\u003cbr\u003e\u003cbr\u003eGreen LED – charging complete\u003cbr\u003e\u003cbr\u003eLow battery indication:\u003cbr\u003e\u003cbr\u003eBattery symbol appears on LCD\u003cbr\u003e\u003cbr\u003eCharge via Type-C cable when low\u003cbr\u003e\u003cbr\u003e⚠️ Important: Use standard DC-5V power adapter only. Do not use higher voltage chargers.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb6a8db03c12b4651953f064a786fc84eq.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eTechnical Specifications – BT-531G CO2 Monitor\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eParameter\tValue\u003cbr\u003eBrand\tBTMETER\u003cbr\u003eModel\tBT-531G\u003cbr\u003eProduct name\tCO2 Monitor \/ Air Quality Meter\u003cbr\u003eDisplay\t84×69mm VA LCD\u003cbr\u003eCO2 Detection:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eRange\t0 – 10000 ppm\u003cbr\u003eResolution\t1 ppm\u003cbr\u003eAccuracy\t±(5% of display + 50ppm)\u003cbr\u003eSensor type\tNDIR (Non-Dispersive Infrared)\u003cbr\u003eSensor life\t\u0026gt;10 years\u003cbr\u003eOperating temp\t-10°C – 50°C\u003cbr\u003eOperating humidity\t0% – 95% RH (non-condensing)\u003cbr\u003eTemperature:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eRange\t-40°C – 80°C \/ -40°F – 176°F\u003cbr\u003eResolution\t0.1°C \/ 0.1°F\u003cbr\u003eAccuracy\t±2°C (±3.6°F)\u003cbr\u003eHumidity:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eRange\t0.1% – 99.9% RH\u003cbr\u003eResolution\t0.1%\u003cbr\u003eAccuracy\t±10.0%\u003cbr\u003eGeneral:\u003cbr\u003e\u003cbr\u003eParameter\tValue\u003cbr\u003eAlarm\tBuilt-in buzzer (≥2000ppm slow, ≥5000ppm fast)\u003cbr\u003ePower supply\tBuilt-in 3.7V Li-ion, 2000mAh\u003cbr\u003eCharging\tType-C USB, DC 5V\u003cbr\u003eCharging time\t~2 hours\u003cbr\u003eOperating time\t~4 hours\u003cbr\u003eMaterial\tABS plastic\u003cbr\u003eDimensions\t128 × 90 × 37 mm\u003cbr\u003eWeight\tApprox. 230g (including battery)\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S49ec08c4a4074d01b92fab08d33f8484m.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eWide Range of Applications – Indoor Air Quality Monitoring\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe BT-531G professional CO2 detector is perfect for:\u003cbr\u003e\u003cbr\u003eScenario\tApplication\u003cbr\u003eOffice\tMonitor CO2 levels for productivity and health\u003cbr\u003eLiving Room\tDaily air quality tracking\u003cbr\u003eBaby Room\tEnsure safe breathing environment for infants\u003cbr\u003eCar\tCheck in-vehicle CO2 during long drives\u003cbr\u003eGreenhouse\tMonitor CO2 for plant growth\u003cbr\u003eClassroom\tMaintain healthy learning environment\u003cbr\u003eWarehouse\tAir quality monitoring for workers\u003cbr\u003eWorkshop\tEnsure safe working conditions\u003cbr\u003eSauna\tMonitor air quality in enclosed spaces\u003cbr\u003eFarm\tCheck CO2 in animal housing\u003cbr\u003eSchool\tProtect students and staff\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sbc7a1c002f894c6e987bfe9347f6740bq.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eImportant Usage Tips – Ensure Accurate Readings\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eDo's ✅\u003cbr\u003e\u003cbr\u003eGuideline\tReason\u003cbr\u003eAllow 1 minute for initial reading\tSensor needs time to stabilize\u003cbr\u003eAllow 5 minutes for fully stable reading\tBest accuracy after warm-up\u003cbr\u003eKeep air inlet\/outlet unobstructed\tProper airflow for detection\u003cbr\u003eUse standard DC-5V charger only\tPrevents damage\u003cbr\u003eStore in clean, dry environment\tProlongs device life\u003cbr\u003eDon'ts ❌\u003cbr\u003e\u003cbr\u003eGuideline\tReason\u003cbr\u003eDon't use in dusty environment frequently\tProlongs sensor life\u003cbr\u003eDon't use in high temperature\/humidity beyond spec\tMay cause inaccurate readings\u003cbr\u003eDon't use near strong magnetic fields\tMay cause measurement errors\u003cbr\u003eDon't insert sharp objects into air inlet\/outlet\tMay damage sensor\u003cbr\u003eDon't disassemble by non-professionals\tInternal circuit damage risk\u003cbr\u003eDon't expose to moisture or rain\tMay cause circuit failure\u003cbr\u003eOperating tips:\u003cbr\u003e\u003cbr\u003ePlace device at breathing height (approx. 1.2-1.5m from floor)\u003cbr\u003e\u003cbr\u003eAvoid placement near windows, doors, or air vents\u003cbr\u003e\u003cbr\u003eFor continuous monitoring, use rear bracket for stable placement\u003cbr\u003e\u003cbr\u003eBattery care:\u003cbr\u003e\u003cbr\u003eCharge battery every 3 months for long-term storage\u003cbr\u003e\u003cbr\u003eLow battery symbol indicates need for charging\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S9e5730497d894351bdddf833c08751f5a.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003ePackage List – What's in the Box\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eItem\tQuantity\u003cbr\u003eBT-531G CO2 Monitor\t1\u003cbr\u003eType-C USB Charging Cable\t1\u003cbr\u003eScrewdriver\t1\u003cbr\u003eUser Manual\t1\u003cbr\u003e⚠️ Important Notes:\u003cbr\u003e\u003cbr\u003eItem\tStatus\u003cbr\u003eBattery\t✅ Included (built-in 2000mAh rechargeable)\u003cbr\u003eUSB charger\t❌ Not included (use standard 5V phone charger)\u003cbr\u003eType-C cable\t✅ Included\u003cbr\u003eScrewdriver\t✅ Included\u003cbr\u003eBefore first use checklist:\u003cbr\u003e\u003cbr\u003eCharge device fully via Type-C (red → green light)\u003cbr\u003e\u003cbr\u003ePower on (press and hold POWER key \u0026gt;3 seconds)\u003cbr\u003e\u003cbr\u003eAllow 1 minute for initial CO2 reading\u003cbr\u003e\u003cbr\u003eAllow 5 minutes for fully stabilized reading\u003cbr\u003e\u003cbr\u003ePress °C\/°F button to select desired temperature unit\u003cbr\u003e\u003cbr\u003eModel: BT-531G – Professional CO2 Monitor with NDIR Sensor, 0-10000ppm, Temperature, Humidity, Type-C Charging, Audible Alarm\u003cbr\u003e\u003cbr\u003eApplications: Office, living room, baby room, car, greenhouse, classroom, warehouse, workshop, sauna, farm, school\u003cbr\u003e\u003cbr\u003eFor technical support or bulk orders, contact us via AliExpress message.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb6a8db03c12b4651953f064a786fc84eq.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"black","offer_id":55441191600427,"sku":"14:193","price":289.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/S6679399f61374ff1acfe542635d469a8m_90d2241a-9539-4930-b501-ed55cc1ba12f.webp?v=1788749980","url":"https:\/\/yoeruyo.com\/products\/bt-531g-co2-monitor-air-quality-meter-ndir-sensor-0-10000ppm-temperature-humidity-type-c-2000mah","provider":"Yoeruyo","version":"1.0","type":"link"}