Bosch Sensortec BME688 is an AI-capable 4-in-1 environmental gas sensor integrating gas, pressure, humidity and temperature sensing. Its configurable gas scanner can detect VOCs and VSCs; Bosch provides BME AI-Studio, BSEC 2.x and a Sensor API for development.
Standard specifications
| Product model | BME688 |
|---|---|
| Sensor type | gas_humidity_pressure_temperature_sensor |
| Supply voltage | VDD 1.71–3.6 V; VDDIO 1.2–3.6 V |
| Calibration | Factory-calibrated; gas-pattern model customization supported with Bosch BME AI-Studio |
| Data interface | I2C|SPI |
| Ingress protection | No IP code stated in the cited Bosch sources |
| Operating temperature | −40 to +85 °C |
| Dimensions | 3.0 × 3.0 × 0.93 mm, 8-pin metal-lid LGA package |
Technical extensions
The gas channel detects VOCs and gases including carbon monoxide, hydrogen and volatile sulfur compounds (VSCs), with application-specific gas-scanner profiles. Bosch page specifications include 0–100% RH, 300–1100 hPa and −40…+85 °C; humidity accuracy tolerance ±3% RH, hysteresis ≤1.5% RH, gas response <1 s for new sensors and H₂S-scan F1 score 0.94. Pressure RMS noise is 0.12 Pa, sensitivity error ±0.25% and temperature coefficient ±1.3 Pa/K. Typical currents: 2.1 µA H/T, 3.1 µA P/T, 3.7 µA H/P/T at 1 Hz; 90 µA ULP, 0.9 mA LP and 3.9 mA standard gas-scan mode; standard H₂S scan 10.8 s, charge 0.18 mAh per five scans. Major software-derived outputs include IAQ and bVOC/CO₂-equivalent indices; gas scanner output depends on application-specific configuration.
Sources: Bosch Sensortec BME688 product page; BME688 product flyer; BME688 datasheet.
