97.爱_99久久精品国产一区二区三区_免费一级A片国产精片观看_欧美精品A片无缓冲不卡,鸥美免费AA片,欧洲无码亚洲精品无码,免费A片在线播放网站,狼色在线观看,国产精品v欧美精品Ⅴ日韩婷婷色婷婷开心五月4房播播 ,欧美日韩午夜福利视频,先锋影音爆乳

Home >  Products Center > Air quality monitor—AQ-Alert
Product Categories

Air quality monitor—AQ-Alert

Air quality monitor—AQ-Alert - click to enlarge
Air quality monitor—AQ-Alert
Model Number: 

AQ-Alert

Brand: 

No brand

Categories:  Infrared gas sensors

Product Description：

Air quality monitor—AQ-Alert
1）A green light corresponds to a CO2 concentration of less than 1500 ppm: air quality is o.k. 
2）A yellow light indicates 1500 to 2500 ppm CO2, and a short beep sounds: air is of low quality and ventilation is recommended. 
3）A red light corresponds to a CO2 concentration of more than 2500 ppm. A short beep sounds twice: air quality is bad and ventilation is therefore necessary. 
4）When the device beeps five times and the red LED blinks, the CO2 concentration has risen above 3000 ppm. 

Message

Tel: +86(0755)83680810
+86(0755)83680830

QQ: 710258725

E-mail: [email protected]