PM2.5 Detector Digital Air Quality Tester Laser Temperature Humidity Meter

Descriptions: The PM2.5 monitor is a monitor for detecting the quality of particles in the atmosphere that are less than or equal to 2.5m of fine particulate matter. Compared with the coarser atmospheric particles, PM2.5 particles have small diameter, large area and strong activity, which are easily associated with toxic and harmful substances (e.g. heavy metals and microorganisms) and long residence time in the atmosphere, conveying distance, and thus the impact on human health and environmental quality of the atmosphere more. This instrument uses the principle of laser scattering. Let the scattering laser irradiation suspended particles in the air. At the same time, to collect scattered light at a particular point of view, get the scattering intensity versus time curve. Then the equivalent particle size of particles and the number of particles of different sizes in unit volume are obtained. Using Instructions: -PM2.5 Measurement Press power switch to turn on power. Wait for 8 seconds to enter measuring interface. The screen displays the PM2.5 reading value, and the two color LED indicator on the screen shows the current level of air pollution. Green is good, yellow is worse, red is bad. Features: -Alarm 1.Alarm switch Each boot, the alarm function is turned on by default. Press Alarm switch to turn off alarm ,then the red light goes out; Press Alarm switch again, The alarm function is turned on, then the red light lights. 2.2.Set alarm value The alarm value is set at 115g/m you can set it by yourself. (Range: 0~500g/m) 1) In normal measurement, long press Alarm switch to enter the alarm setting, then the screen displays the current alarm value and the red light flashes; 2) Adjust the alarm value size through the up/down button. 3) Press to Alarm switch save the alarm value, or press to Power on/off return the measurement state. Attention: press Alarm switch enter date setting, press Power on/off back to measurement state. 3.Alarm function (Sound & Display) When the measuring value of the instrument exceeds the set alarm value, the instrument sends out the alarm sound of Di Di Di Di... and locks the measuring data and flashes the measuring value. Instrument alarm duration of 2 minutes, After 2 minutes, or press any button ,the instrument stops the alarm sound, the screen does not blink, but still lock data. Normal measurements are resumed after 5 seconds. -Data Records The instrument automatically every 4 seconds a data storage, The stored value is the maximum PM2.5 value in 4s. The instrument can be stored continuously for a year, a year after the instrument automatically cleared six months before the data, the user can through the computer software transfer out record. -Connecting The instrument provides computer applications that can communicate with the computer via USB, download records, sample in real-time, print charts and data, and so on Specification: Measuring range: 0-500ug/m3 Consistency: 10%@100~500g/m; 10g/m@0~100g/m Response time of once: