What is a particulate matter sensor?

What is a particulate matter?

Particulate matter (or simply “PM”) is a mixture of suspended solid particles and small liquid droplets that can be inhaled and can cause serious health problems. PM includes a wide variety of particles with varying characteristics (i.e., shape, optical properties, size, and composition), but is commonly divided into several subclasses by particle size. The different classes of particulate matter are usually reported under the common nomenclature “PMx”, where “x” refers to the diameter of large particles in a mixture of suspended particles or “aerosol”. For example, PM2.5 generally refers to inhalable particles 2.5 microns in diameter and smaller, PM10 refers to particles 10 microns in diameter and smaller, and so on.

PM2.5 sensor works

How the PM2.5 sensor works

PM2.5 sensor is also called dust sensor, particulate matter sensor, which can be used to detect the concentration of PM2.5 in the air. The current mainstream pm2.5 sensor in the market is developed based on the principle of light scattering.

Particles will produce light scattering phenomenon under the irradiation of light. When a beam of parallel light is incident on the measured particle, the particle will scatter the light. The photosensitive element next to it converts the light signal of the scattered light into an electrical signal, and the electrical signal is amplified, and is calculated by the MCU as a particle concentration value and output.

This process is like turning on a flashlight in the dark. We find a lot of floating particles in the light beam of the flashlight, and then our brain judges the current particle concentration according to the number of particles in the light beam. Finally, tell others high or low concentration.

In this process, the flashlight acts as the light-emitting element in the sensor, the human eye acts as the photosensitive element in the sensor, the brain acts as the signal processing and MCU computing unit, and the “dictation” acts as the output unit of the sensor.

flashlight beam indication

Particulate matter sensor model

Model Number Model Detection Range Communication Method Product Size Product Features
FS00201
FS00201 0~1000μg/m³ (Expandable)
UART (3.3V_TTL Voltage level)
50.0×36.0x21.0 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00202
FS00202 0~1000μg/m³ (Extendable)
UART (3.3V_TTL Voltage level)
47.8×36.8×12.0 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00203
FS00203 0~1000μg/m³ (Expandable)
UART (3.3V_TTL Voltage level)
47.8×36.8×12.0 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00209
FS00209 0~1000μg/m³ (Expandable)
UART (3.3V_TTL Voltage level)
50.0×38.0x21.2 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0、PM0.3、PM0.5、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00210
FS00210 0~1000μg/m³ (Extendable)
UART (3.3V_TTL Voltage level)
47.8×36.8×12.0 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00213
FS00213 0~1000μg/m³ (Extendable)
UART (3.3V_TTL Voltage level)
58.5×44.5×13.6 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00215
FS00215 0~100μg/m³: ±10μg/m³
UART (3.3V_TTL Voltage level)
54.0×43.0x40.2 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0、PM0.3、PM0.5、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00216
FS00216 0~1000μg/m³ (Extendable)
UART (3.3V_TTL Voltage level)
53x43x40.2 mm
  • Detect mass concentration of PM2.5、PM10、PM1.0
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
FS00217
FS00217 0~5000mg/m³
UART (3.3V_TTLVoltage level)
43.5×43.5×77.0 mm
  • Dust removal disassembly structure design
  • Detection range includes: PM0.3,PM0.5, PM1.0, PM2.5, PM5.0, PM10
  • Accurate constant current control
  • 10 years service life
  • Reliable service for sustainable cooperation
FS00218
FS00218 0~1000μg/m³ (Expandable)
UART (3.3V_TTL Voltage level)
50.0×36.0x21.0 mm
  • It can detect PM10, PM2.5, PM1.0 simultaneously
  • Support UART (IIC,DAC,PWM)
  • High Accuracy & Rapid Response
  • 10 years service life
  • Fully shielded design, anti-static interference
  • The minimum resolution particle size is 0.3 micrometers
  • Reliable service for sustainable cooperation
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