Gravity - PM1 / PM2.5 / PM10 Air Quality Sensor - DFRobot SEN0460

Sensor module allows you to monitor the purity of the air, measures PM1 / PM2.5 / PM10. Equipped with a sensor to detect particles with a diameter of more than 0.3 μm, such as cigarette smoke. The chip is powered by 5 V and communicates through the I2C interface. The sensor is equipped with Gravity connector.

Gravity - PM1 / PM2.5 / PM10 air quality sensor - DFRobot SEN0460.

Schematic of how the air quality sensor works.

The sensor works by scattering particles with a laser. The laser irradiates the airborne particles for scattering, while collecting the scattered light at a certain angle and obtaining the intensity curve of the scattered light with time. In addition, the microprocessor, based on the MIE theory algorithm, obtains the equivalent particle size and the number of particles with different sizes per unit volume.

MIE solutions - the exact solution of the problem of light scattering on spherical particles in the form of an infinite but convergent series. MIE solutions give information about the amount of radiation absorbed or scattered by a particle. The scattering properties of the particle calculated according to this solution are called MIE scattering.

• Accurate measurement
• No false alarms
• Real-time response
• Minimum detectable particle size: 0.3 µm
• Protection against interference
• Small module dimensions

• Gravity - PM1 / PM2.5 / PM10 air quality sensor - DFRobot SEN0460
• Gravity 4-pin cable

The air quality sensor has a built-in Gravity connector.

Connection of sensor to Arduino.

The module uses I2C interface for communication. Connect it using the included Gravity cable to the board according to the diagram. Pinouts of the module:

• VCC/+: power supply
• GND/-: ground
• SCL/C: I2C clock line
• SDA/D: I2C data line

• Sensor PM1 / PM2.5 / PM10
• Supply voltage: 5 V
• Current consumption: 100 mA
• Resting current: ≤ 2 mA
• Data interface level (at maximum supply voltage of 3.3 V):
  • Low＜ 0.8 V
  • High > 2.7 V
• Particle measurement range:
  • 0.3 μm to 1.0 μm
  • 1,0 μm to 2,5 μm
  • 2.5 μm to 10 μm
• Particle counting accuracy:
  • 50% at 0.3 μm
  • 98% at ≥ 0.5 μm
• Particle mass concentration range (PM2.5 standard value): 0 to 500 ug/m³
• Maximum particle mass concentration range (PM2.5 standard value): ≥ 1000 ug/m³
• Particle mass concentration resolution: 1 ug/m³
• Particle mass concentration consistency (PM2.5 standard value):
  • 1. ± 10% / 100 ~ 500 ug/m³
  • 2. ± 10 ug/m³ at 0 ~ 100 ug/m³
• Standard volume: 0.1 l
• Single response time: 1 s
• Total response time: ≤ 10 s
• Working temperature: from -10°C to +60°C
• Operating humidity range: 0% to 95%
• Module dimensions: 67 x 40 x 14 mm

Dimensions of the air quality module from DFRobot.

• DFRobot SEN0460 manufacturer website
• Product Wiki page