The sensor adopts the principle of laser scattering.The scattered light is collected at a certain Angle to obtain the curve of the scattered light intensity changing with time.Furthermore, the microprocessor used the algorithm based on MIE theory to obtain the equivalent particle size and the number of particles with different particle sizes per unit volume.

PM2.5 sensor

How it works: Laser scattering

Measuring diameter: 0.3-1.0um 1.0-2.5um 2.5-10um

Measurement unit: ug/m3

Measurement accuracy: UG /m3

Response time: <10s

Working current: 5V200ma@ working status 5V2ma@ standby status

Data interface: Serial port (3.3VTTL level)

Module size: 65x42x23mm

Interface description

Data interface: 2 pins are serial data communication interfaces, which adopt general asynchronous transceiver protocol (UART);1 pin is the control signal interface, using high and low level control, the average of all electricity is 3.3VTTL level.

Note: SET=1 module works in the continuous sampling mode. After each sampling, the module takes the initiative to upload the sampling data. The sampling response time is less than 600 milliseconds, and the data update time is less than 2 seconds.

SET=0 module enters low power standby mode

PMS5303 Main features

1, laser scattering principle to achieve accurate measurement

2, zero error alarm rate

3, real-time corresponding ratio and support continuous collection

4. Minimum resolution 0.3micron

5, new patent structure, six all-round shielding, stronger anti-interference performance

6, import and export direction optional, wide range of application, users do not need to carry out air duct design

Summary:

PMS5303 is a digital universal particle sensor based on the principle of laser scattering. It can continuously collect and calculate the number of suspended particles with different particle sizes in the air per unit volume, that is, the concentration distribution of particles, and then convert it into mass concentration, and output it in the form of universal digital interface. The sensor can be embedded in various instruments or environmental improvement equipment related to the concentration of suspended particulate matter in the air to provide timely and accurate concentration data.

Working principle:

The sensor adopts laser scattering principle, if laser scattering produces on the suspended particles in the air, at the same time at a specific Angle collect the scattered light, get the curve of the scattering light intensity changes over time, and then the theory of microprocessor based on MIE (MIE) algorithm, it is concluded that the equivalent grain size of particles of different size particles per unit volume and quantity.