DFRobot Gravity Analog PM2.5 Air Quality Sensor

This DFRobot module applies the same laser-scattering measurement principle as dedicated commercial air quality monitors - a laser beam scatters off suspended particles, and the sensor's optics convert that scattering pattern into an accurate particle concentration reading covering the full practical PM2.5 range from 0 to 500µg/m³. Sub-1-second single-point response time means it reacts quickly enough to catch a sudden dust event (cooking smoke, an opened window near traffic) rather than only tracking slow ambient trends.

Six-sided shielding around the sensing chamber specifically guards against electromagnetic interference and stray light from six directions, a more thorough approach than partial shielding designs, and a rated MTBF (mean time between failures) of 5+ years signals genuine durability for a permanently-installed air quality monitoring deployment rather than a short-term demo. The included Gravity-4P cable supporting both I2C and UART gives flexibility in how it integrates with an existing project's communication bus.

Common uses are permanent indoor/outdoor air quality monitoring installations, smart building and HVAC systems responding to real particulate data, and environmental research applications needing long-term reliable PM2.5 measurement.