Size: 35mm×40mm×28mm Air Quality Monitor Indoor, 8 in 1 Formaldehyde Detector, voc Meter, Detect Indoor HCHO,TVOC,AQI,PM2.5,PM10,PM1.0,Temperature and Humidity Tester. Colorful LCD Screen & USB Charging (White MQ-138 Formaldehyde VOC Gas Sensor Module MQ138 VOC (Volatile Organic Compound) Gas Sensor Module 1-100ppm HCHO Sensor MQ138 gas sensor has high sensitivity to toluene, acetone,alcohol,methanol,also can monitor hydrogen and other organic vapour well Working temperature: -10 ~ 50 oC (nominal temperature 20 oC) ; Humidity: 95% RH (nominal humidity 65% RH) MQ-138 MQ138 Formaldehyde HCHO Volatile Organic Compounds (VOC) Gas Sensor Module with Alarm Signal Light. Detects hazardous gases with high accuracy Test concentration range :1-100ppm ; Sensitivity: >3% ; Response time: < 1S (3-5 minute warm-up, theory preheating time 48 hours)
