Design a portable detector that can real-time detect ambient temperature

humidity and PM2. 5 values.The detector uses an Arduino UNO board as the core

and collects data by multiple sensors. By programming on the Arduino integrated development environment（ IDE）

control data acquisition

and the processed results will be presented on monitor

the displayed data will update once every 2. 5 s

so as to achieve the purpose of real-time detection. At range of 45

80 μg / m

3

this detector has relative deviation less than ± 5 % comparing with Hanwang N1 type haze meter

and the detector has features of sensitive response

real-time update

simple and practical.