DFRobot
Gravity: PM2.5 Air Quality Sensor
The Gravity PM2.5 Air Quality Sensor uses laser scattering to measure suspended particulate matter in three size ranges — PM1.0, PM2.5, and PM10 — and output...
The Gravity PM2.5 Air Quality Sensor uses laser scattering to measure suspended particulate matter in three size ranges — PM1.0, PM2.5, and PM10 — and outputs concentration data via I2C. With a minimum detectable particle size of 0.3 µm and a response time under 1 second, it provides real-time, accurate air quality readings.
The Gravity interface and included sample code make it straightforward to integrate with Arduino and other main controllers for indoor air quality monitoring, environmental data logging, and smart ventilation systems.
Key Features
- Laser Scattering Measurement – Accurate particulate detection with zero false alarm rate
- Three Particle Ranges – 0.3–1.0 µm, 1.0–2.5 µm, and 2.5–10 µm
- I2C Data Output – Easy integration with microcontrollers
- Gravity Interface – Plug-and-play with DFRobot ecosystem
- Ultra-Thin Design – Only 12 mm thick, suitable for portable devices
- Six-Sided Shielding – Enhanced electromagnetic interference protection
- Real-Time & Continuous – Single response <1 s, comprehensive response ≤10 s
Specifications
- Working Voltage – 5.0 V
- Max Current – 100 mA (standby ≤2 mA)
- PM2.5 Effective Range – 0–500 µg/m³
- PM2.5 Maximum Range – ≥1000 µg/m³
- Resolution – 1 µg/m³
- Counting Efficiency – 50% @ 0.3 µm, 98% @ ≥0.5 µm
- Consistency – ±10% @ 100–500 µg/m³; ±10 µg/m³ @ 0–100 µg/m³
- Data Interface Level – Low <0.8 V, High >2.7 V (max 3.3 V)
- Operating Temperature – −10 °C to +60 °C
- Operating Humidity – 0–95% RH (non-condensing)
- MTBF – ≥5 years
- Dimensions – 67 × 40 × 14 mm
Ideal For
- Indoor air quality monitoring stations
- Smart ventilation and HVAC control
- Environmental data logging projects
- Portable air quality meters
Jargon buster
Plain-language definitions for the technical terms used above.
- electromagnetic interference
- Electromagnetic interference is unwanted electrical noise from nearby devices, cables, or radio signals that can disturb a signal in a wire. Shielding helps reduce this noise, which matters for network adapters because cleaner signals are less likely to cause unreliable connections or data errors.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- particulate matter
- Particulate matter means tiny particles suspended in the air, such as dust, smoke, pollen, or pollution. A sensor that measures it is useful for air-quality projects because particle levels can affect comfort and health.
- PM1.0
- PM1.0 refers to airborne particles with a diameter of about 1 micrometre or smaller. This size category matters because smaller particles can stay airborne longer and may come from sources such as smoke or combustion.
- PM10
- PM10 refers to airborne particles with a diameter of about 10 micrometres or smaller. It includes larger dust and pollen-like particles, so it is useful for detecting coarser airborne pollution.
- PM2.5
- PM2.5 refers to airborne particles with a diameter of about 2.5 micrometres or smaller. It is a common air-quality measurement because these fine particles can be breathed deep into the lungs.
Find this product in
Brands
Supplier page — dfrobot.com
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Related Tutorials
Free guides on learn.littlebird.com.au
