Air Quality Meters PMS7003. PM2.5 Sensor Module Built-in Fan. NodeMCU Fully backward-compatible 40-pin GPIO header

Fully backward-compatible 40-pin GPIO header

microSD card slot (high-speed SDR104 mode)

It's not a finished product of OBDII diagnostic scanner

particle size with minimum resolution 0

Air Quality Meters PMS7003. PM2.5 Sensor Module Built-in Fan. NodeMCU Fully backward-compatible 40-pin GPIO headerPrinciple: this sensor uses the principle of La Ser scattering, i. e. the La Ser is irradiated to suspended particles in the air to create scattering, and at the same time the scattered light is collected at a certain angle to maintain the curve of the scattered light over time. The microprocessor uses an algorithm based on the MIE theories to obtain the equivalent particle size of the particles and the number of particles of different sizes per unit