Gravity: PM2.5 Air Quality Sensor

This DFRobot Gravity Air Quality Sensor can measure particulate matter in the air, such as PM2.5, PM1.0 and PM10.

With the easy-to-use Gravity interface, this air quality sensor works well with most microcontrollers and comes with sample code to help you quickly build up air quality monitoring projects.

Based on the principle of laser scattering, the PM2.5 air quality sensor employs a digital universal particle sensor that can continuously collect and calculate the number of suspended particles of different sizes in the air per unit volume, which is particle concentration distribution, and then convert to concentration and output via the I2C interface.

The sensor can be embedded in various instruments and meters or environmental improvement equipment related to the concentration of suspended particulate matter in the air to provide timely and accurate concentration data.

How does the sensor work?

This sensor adopts the principle of laser scattering, that is, to make the laser irradiate the suspended particles in the air to produce scattering, and at the same time collect the scattered light at a certain angle, and obtain the curve of the intensity of the scattered light with time. Furthermore, the microprocessor, based on the MIE theory algorithm, obtains the equivalent particle size of the particles and the number of particles of different particle sizes per unit volume.

Features

• Laser scattering principle, accurate measurement
• Zero false alarm rate
• Real-time response and support continuous acquisition
• Minimum recognizable particle size 0.3µm
• Six-sided all-around shielding, stronger anti-interference
• Ultra-thin design, only 12mm, suitable for portable devices

Specifications

• Working Voltage: 5.0V
• Maximum Working Current: 100mA
• Standby Current: ≤2mA
• Data Interface Level: L＜0.8V, H>2.7V, maximum voltage level 3.3V
• Particle Measurement Range: 0.3 ~ 1.0μm; 1.0 ~ 2.5μm; 2.5 ~ 10μm
• Particle Counting Efficiency: 50% @ 0.3μm 98% @ ≥0.5μm
• Effective Range of Particle Mass Concentration (PM2.5 standard value): 0~500ug/m³
• Maximum Range of Particle Mass Concentration (PM2.5 standard value): ≥1000ug/m³
• Resolution of Particle Mass Concentration: 1ug/m³
• Consistency of Particle Mass Concentration (PM2.5 standard value): 1. ± 10% @100 ~ 500 ug/m³; 2. ±10 ug/m³@0 ~ 100 ug/m³
• Standard Volume: 0.1 L
• Single Response Time: ＜1s
• Comprehensive Response Time: ≤10s
• Working Temperature Range: -10~+60℃
• Working Humidity Range: 0~95%% (non-condensing)
• Mean Time Between Failures: ≥5 years
• Product Size: 67 mm * 40 mm * 14 mm / 2.64* 1.57 * 0.55 inches

Package Contents

• 1x Gravity: PM2.5 Air Quality Sensor
• 1x Gravity 4-pin I2C/UART Sensor Cable

Resources

• Product Wiki