Overview: The SDS011 using principle of laser scattering,can get the particle concentration between 0.3 to 10m in the air. It with digital output and built-in fan is stable and reliable. Accurate and Reliable: laser detection, stable, good consistency; Quick response: response time is less than 10 seconds when the scene changes; Easy integration: UART output (or IO output can be customized), fan built-in; High resolution: resolution of 0.3g/m. Scope of application:Detector of PM2.5;Purifier. Working principle: Using laser scattering principle: Light scattering can be induced when particles go through the detecting area. The scattered light is transformed into electrical signals and these signals be amplified and processed. The number and diameter of particles can be obtained by analysis because the signal waveform has certain relations with the particles diameter. About service life: Service life is the key parameter of laser dust sensor. The laser diode in this sensor has high quality and its service life is up to 8000 hours. If you need real-time data (such as detector), you can use the default configuration that measures at the frequency of 1time per second. On the occasion of real-time demand is not high (such as filter, air quality monitoring, etc.), you can use the discontinuous working method to prolong the service life. For example, you can start the sensor for per minutes. Product size:LxWxH 71x70x23mm There are slight differences in the printing of the notes or circuit boards, which does not affect the use. Colour:As Shown Material:PC + Aluminum Alloy Package Contents: 1 * Sensor Module Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.