The SDS011 is a dust and particulate matter (PM) sensor that uses the principle of laser scattering for detecting partcles between 0.3 to 10μm in the air. It is designed and manufactured by "Nova Fitness".

This sensor is used to measure air quality and has been judged by the sensor.community project as one of the best low-cost PM sensors for their project. It can return values of PM2.5 and PM10 through a UART (serial) connection.

• Accurate and Reliable
• Quick response: response time is less than 10 seconds
• Easy integration: UART output (or IO output can be customized)
• Built in fan
• High resolution: resolution of 0.3μg/m3

It works by light scattering when particles go through the detecting area. The scattered light is transformed into electrical signals and these signals will be amplified and processed.

The laser diode in this sensor has high quality and its service life is up to 8000 hours. If you need continuous real-time data, you can use the default configuration that measures at the frequency of 1Hz. You can also use the discontinuous working method to prolong the service life. For example, you can start the sensor for 30 seconds every 10 mins.

This sensor is used in the Air Quality Sensor Kit we supply.

The technical data sheet is available here.

The technical specifications are:

• Output: PM2.5, PM10
• Measuring Range: 0.0-999.9μg/m3
• Input Voltage: 4.7V to 5.3V
• Maximum Current: 100mA
• Sleep Current: 2mA
• Response Time: 1 second
• Serial Data Output Frequency: 1 time/second
• Particle Diameter Resolution: ≤0.3μm
• Relative Error: 10%
• Temperature Range: -20~50°C
• Accurate and Reliable: laser detection, stable, good consistency
• Easy integration: UART output (or IO output can be customized)