The SmartElex BME688 Environmental Sensor is a breakout that combines a gas scanning sensor with temperature, humidity, and barometric pressure sensing for a complete environmental sensor in a single package. The gas sensor on the BME688 can detect a wide variety of volatile organic compounds (VOCs), volatile sulfur compounds (VSCs), and other gases such as carbon monoxide and hydrogen in the part per billion (ppb) range. Combine that with precise temperature, humidity, and barometric pressure, and the BME688 can work as a completely standalone environmental sensor all in a 1in. x 1in. breakout!

The sensor communicates via either I²C or SPI. We’ve broken out the I²C pins to our Molex PicoBlade connector so no soldering is required to connect it to the rest of your system, but if you would prefer, both the I²C and SPI pins are also broken out to standard 0.1-in.-spaced pins.

Note: In order to avoid contamination of its gas scanning capabilities, DO NOT touch the metallic casing of the BME688 sensor. Please, handle this with care.

Features:

1. BME688 – Gas scanning sensor with temperature, humidity, and barometric pressure sensor in a single package.
2. I²C or SPI communication
3. Uses I²C interface
   • I²C Addresses: 0x76 (Default) or 0x77
   • 2x Molex PicoBlade Connectors
4. Operating voltage range
   • 1.71V – 3.6V
   • Typically?3.3V
5. Relative humidity
   • Operating range: 0% to 100%
   • Absolute Accuracy:±3%RH
   • Resolution: ±0.008%RH
6. Temperature
   • Operating range: -40ºC to +85 ºC
   • Absolute Accuracy: 1.0ºC
   • Resolution: 0.01ºC
7. Pressure
   • Operating range: 300hPa – 1100hPa
   • Absolute accuracy: 60Pa (0ºC to 65ºC)
   • Resolution: 0.18PA, highest oversampling
8. Gas
   • F1 score for HS scanning: 0.92
   • Standard scan speed: 10.8 sec/scan
   • Sensor-to-sensor deviation: 15%  15
9. Typical current consumption (varies based on mode and active sensor)
   • 2.1 A to 18mA
   • 0.15 A (sleep mode)
   • 3.9 mA in standard gas scan mode