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.
Features
Bad breath or spoiled food detection based on the measurement of volatile sulfur compounds, which are an indicator of bacteria growth
Detection of unusual gases and smells, which might indicate for instance a leakage or fire
Diaper state detection, e.g. for baby care
Early detection of odors & bad smells
Wildfire detection
Reverse polarity protection (on Breakout Garden connector)
Raspberry Pi-compatible pinout (pins 1, 3, 5, 7, 9)
Compatible with Arduino
Compatible with Raspberry Pi (Python library)
Compatible with Raspberry Pi Pico (C++/Micro Python libraries)
Specification
| Model | BME688 |
| Product Type | 4-in-1 Air Quality Breakout (Gas, Temperature, Pressure, Humidity) |
| Operating Voltage(V) | 1.71 V to 3.6 V |
| Operating Current (A) | 3.1 µA |
| Interface | I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz) |
| Operating Temperature (°C) | -40 to +85 °C |
| Standard Scan Speed | 10.8 s / scan |
| Power Consumption (Watt) | < 0.1 mA in ultra-low power mode |
| Accuracy tolerance | ±3% r.H. |
| Response time | ~8 s |
| Dimensional Accuracy (mm) | 3.0 mm x 3.0 mm x 0.93 mm |
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