This product can be widely used in public places, environmental and personal air space air environment measurement, air purifiers can also be used for testing and evaluation of the efficiency analysis can be directly tested the air quality index pm2.5 value, the unit is micrograms / cubic meter , with China now the EPA announced pm2.5 consistent units. Handheld PM2.5 speed tester is designed to measure air PM2.5 (particulate matter into the lungs) and PM10 (particulate matter) values ??of special detection equipment. It was Saina Wei Environmental Technology Co., Ltd. of Shenzhen City in the absorption of foreign advanced high-sensitivity miniature laser sensor technology developed on the basis of a set of aerodynamics, digital signal processing, optical and electrical integration of high-tech products. The instrument has a test high precision, stable performance, versatility, simple operation and convenient features. Test particle size PM2.5, PM10 (range 0-500ug/m3) sampling theory light scattering laser diode light source concentration units micrograms / cubic meter per sampling time 60s Power Rechargeable Li-ion Lithium-ion battery (7.4V/1020mAh) or AC Adaptor (Input: 100 ~ 240V, Output 9V/1.5A) Battery working time longer than 3 hours continuous testing Dimensions 93 (W) × 46 (D) × 180 (H) mm Weight Approximately 600 g (with battery) Environment conditions of the working environment 5 ~ 45 ℃, <90% RH Storage Environment: -20 ~ 60 ℃, <90% RH Standard accessories AC adapter, manual, portable protective bag Pm10 Detector Main Features 1. direct reading real-time dust concentration, numerical display 2. innovative electronic cutting technology 3. light scattering principle high precision 4. rapid response test 5 Simple operation, no maintenance 6. efficient high-capacity lithium battery 7. intelligent recognition automatic shutdown, save power usage to maximize Method: Hold down the power button for 3 seconds to boot off the sampling port on the dust cover, fitted with temperature and humidity sensors (Align notch insert, no alignment is not installed, then go up), press the run / stop button to begin test, each test procedure time was 60 seconds, with 60 seconds sampling time is mainly to ensure that the sampling is representative, as close to the average of the surrounding air, automatically displays the complete test results, test if needed, then click the run / stop button again to start the test instrument. To stop midway, press the run / stop button to stop the test. After the test, record data, and then press the power button off, put dust cover, the instrument a good income, into bubble protective bag can be. This instrument is portable, where we go test there, keep records of the air around the pm2.5 situation, in order to determine the suitability go workout or other outdoor activities. WHO provides pm2.5 less than 10 micrograms / cubic meter to a safe value, European dimension: pm2.5 less than equal to 35 micrograms / cubic meter, the air quality is good. National standards: pm2.5 annual average is less than equal to 70 micrograms / cubic meter, the air quality is good when pm2.5 greater than 70 micrograms / cubic meter, it is recommended to minimize outdoor exercise