Gravity: PM2.5 Air Quality Sensor
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Description
The Gravity: PM2.5 Air Quality Sensor is a high-precision laser scattering module designed to measure PM1.0, PM2.5, and PM10 particulate matter in real time. Equipped with an easy-to-use Gravity I2C interface, it is ideal for makers, students, and educators building automated air quality and environmental monitoring systems.
Real-time particulate matter monitoring
The sensor continuously collects and calculates the concentration of suspended PM1.0, PM2.5, and PM10 particles per unit volume. It outputs live data via I2C, making it well suited for deployment in kitchens, smoking areas, bathrooms, and environmental improvement equipment.
Laser scattering detection method
Suspended particles are irradiated by an internal laser to produce light scattering, which is analysed using MIE theory algorithms to determine precise particle size distribution. It identifies particles as small as 0.3 micrometres with zero false alarm rate.
Shielded compact hardware design
Featuring six-sided all-round shielding for enhanced anti-interference, the module is built with an ultra-thin 12mm profile suited for portable devices. It achieves a single response time under one second and a comprehensive response time within ten seconds.
Straightforward Gravity controller integration
Operating across a 3.3V to 5V voltage range, the sensor works seamlessly with standard development boards and microcontrollers. The module includes a Gravity 4-pin I2C/UART sensor cable for quick, solderless wiring.
Accurate wide-range particle detection
The module provides an effective PM2.5 measurement range of 0 to 500 ug/m³ with a resolution of 1 ug/m³ and maximum range exceeding 1000 ug/m³. It maintains reliable consistency within ±10% between 100 and 500 ug/m³, operating reliably across -10°C to +60°C.
Downloads & documentation
Specifications
| Working Voltage | 3.3V~5V |
| 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 |
| 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 | 72mm * 40mm * 14mm / 2.83 * 1.57 * 0.55 inch |
In the box
| Gravity: PM2.5 Air Quality Sensor | 1 |
| Gravity-4P I2C/UART Sensor Cable | 1 |
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