Product description: Gravity - Air Quality Sensor - SGP40 - DFRobot SEN0394
Air qualitysensor produced by DFRobot. It has a built-inSGP40chip (introduced by the well-known company Sensirion), which measures the VOC air quality in the rangefrom 0 ppm to 1000 ppm. The values are presented as VOCindexreadings - from 0 to 500. The air quality depends on what range the reading is in - the lower the VOC index value, the cleaner the air. The module usesI2Ccommunication interface. The longer thesensoris used, the better its sensitivity and accuracy of trend and change. In an average environment (with potentially low air pollution), the sensor can obtain an accurate VOC index immediately after use. Conversely, in a heavily polluted environment, the sensor may obtain an accurate VOC indicator approximately 1 hour after activation.
Gravity - Air Quality Sensor - SGP40.
Product compatible with Arduino and Raspberry Pi
The manufacturer provides a detaileduser guidethat makes it significantly easier to get started with the module. It also provides libraries forArduino IDEandPythonenvironments.
The kit also includes a dedicated Gravity-compatible connection cable.
Feature overview
- Very low current consumption - about 2.6 mA
- Built-in temperature and humidity compensation, no calibration required
- VOC indicator for direct indication of air quality
- Use in applications such as air purifiers, kitchen hoods, thermostats, and indoor air quality monitoring systems
Kit contents
- Gravity Air Quality Sensor - SGP40
- Gravity connection cable
VOC index
- from 0 to 100 - air quality: excellent
- 100 to 200 - air quality: good
- 200 to 300 - air quality: slightly polluted
- 300 to 400 - air quality: slightly polluted
- 400 to 500 - air quality: very polluted
Interpretation of the VOC index readings.
Schematic of the connection of the DFRobot sensor to the Arduino equivalent circuit board. The board is not part of the kit, it can be purchased separately.
Pinout and connection diagram
The sensoris equipped with a connector compliant with the Gravity standard. Using this type of connector significantlysimplifiesandspeeds upthe process of connecting the sensor to the controller module - Raspberry Pi or Arduino and their boards. Connect the components according to the relationship:
- VCC (+) - power supply from 3.3 V to 5 V
- GND (-) - system ground
- SCL (C) - I2C bus clock line
- SDA (D) - I2C bus data line
Technical specification of the sensor
- Type: air quality sensor
- Embedded circuit: SGP40
- Measurement range:
- VOC: 0 ppm to 1000 ppm
- VOC index: 0 to 500
- Power supply: from 3.3 V to 5 V
- Operating current: 2.6 mA
- Start-up time: 10 s
- Response time: 2 s
- Communication interface: I2C bus
- Interface address: 0x59
- Operating temperature range: from -10°C to 50°C
- Storage temperature range: from 5°C to 30°C
- Working humidity range: from 0% to 90% RH
- Dimensions: 20 x 22 mm
DFRobot - Air quality sensor.
