Air Quality Bricklet

Description / Air Quality Bricklet

The Air Quality Bricklet can measure

IAQ (indoor air quality) index,
Air pressure in hPa,
Humidity in %RH and
Temperature in °C.

The IAQ index is a measurement for the quality of air. To calculate the IAQ index the Bricklet detects ethane, isoprene (2-methylbuta-1,3-diene), ethanol, acetone and carbon monoxide (often called VOC, volatile organic components) by adsorption. These gas measurements are combined with the measurements of air pressure, humidity and temperature to calculate the final IAQ index.

The IAQ index has a range of 0-500:

Typical applications for this Bricklet are the monitoring of air quality, environmental statistics, home automation and similar.

Technical Specifications

Property	Value
Sensor	BME680
Current Consumption	100mW (20mA at 5V)

IAQ Index Resolution	1
Air Pressure Resolution	0.0018hPa
Humidity Resolution	0.008%RH
Temperature Resolution	0.01°C
IAQ Index Accuracy	±15 and ±15% of reading
Air Pressure Accuracy	±0.12hPa (700-900hPa at 25-40°C), ±0.6hPa (full scale)
Humidity Accuracy	±3%RH (20-80%RH at 25°C)
Temperature Accuracy	±0.5°C (at 25°C), ±1.0°C (0-65°C)*
Measurement Frequency	0.3 measurements per second

Dimensions (W x D x H)	25 x 20 x 5mm (0.98 x 0.79 x 0.19")
Weight	2.1g

* This is the temperature at the exact position of the sensor. If the Bricklet is used inside of an enclosure, the air around the Bricklet may heat up more than the ambient air. The Bricklet does have API to calibrate this kind of offset.

Calibration of the temperature value is recommended, since the temperature value is used to compensate the IAQ index and humidity values.