Gas Sensor BME688
4-in-1. Air quality. Specific gas sensing.
BME688
Environmental sensing with Artificial Intelligence
The BME688 is the first gas sensor with Artificial Intelligence (AI) and integrated high-linearity and high-accuracy pressure, humidity and temperature sensors. It is housed in a robust yet compact 3.0 x 3.0 x 0.9 mm³ package and especially developed for mobile & connected applications where size and low power consumption are critical requirements. The gas sensor can detect Volatile Organic Compounds (VOCs), volatile sulfur compounds (VSCs) and other gases such as carbon monoxide and hydrogen in the part per billion (ppb) range.
Additionally to all features of the BME680, the BME688 has a gas scanner function. In standard configuration, the presence of VSCs is being detected as indicator for e.g. bacteria growth. And the gas scanner can be customized with respect to sensitivity, selectivity, data rate and power consumption as well. The BME AI-Studio tool enables customers to train the BME688 gas scanner on their specific application, like in home appliances, IoT products or Smart Home.
Technical data
| Parameter | Technical data |
|---|---|
|
Parameter
Package dimensions
|
Technical data
8-Pin LGA with metal
3.0 x 3.0 x 0.93 mm³ |
|
Parameter
Operation range (full accuracy)
|
Technical data
Pressure: 300...1100 hPa
Humidity 0…100% Temperature: -40…85°C |
|
Parameter
Supply voltage VDDIO
Supply voltage VDD |
Technical data
1.2 ... 3.6 V
1.71 ... 3.6 V |
|
Parameter
Interface
|
Technical data
I²C and SPI
|
|
Parameter
Average current consumption
|
Technical data
2.1 µA at 1 Hz humidity and temperature
3.1 µA at 1 Hz pressure and temperature 3.7 µA at 1 Hz humidity, pressure and temperature 90 µA at ULP mode for p/h/T & air quality 0.9 mA at LP mode for p/h/T & air quality 3.9 mA in standard gas scan mode (gas scan mode & scan rate can be optimized on applications with BME AI studio) |
|
Parameter
Gas sensor
F1 score for H₂S scanning Standard scan speed Electric charge for standard scan Response time (τ 33-63%) Sensor-to-sensor deviation Power consumption Output data processing |
Technical data
0.94 10.8 s / scan 0.18 mAh (5 scans ~ 1 min) < 1 s (for new sensors) +/- 15% +/- 15 < 0.1 mA in ultra-low power mode Major direct outputs: Index for Air Quality (IAQ), bVOC-& CO₂-equivalents (ppm), Gas scan result (%) & many more (all listed in datasheet in Table 20: BSEC outputs) |
|
Parameter
Humidity sensor
Response time (τ0-63%) Accuracy tolerance Hysteresis |
Technical data
8 s ± 3 % relative humidity ≤ 1.5 % relative humidity |
|
Parameter
Pressure sensor
RMS Noise Sensitivity Error Temperature coefficient offset |
Technical data
0.12 Pa (equiv. to 1.7 cm) ± 0.25 % (equiv. to 1 m at 400 m height change) ±1.3 Pa/K (equiv. to ±10.9 cm at 1°C temperature change) |
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Order complete BME688 Development Kit (ready-to-use)
Order the pre-programmed and ready-to-use Development Kit for the BME688 sensor.
