BME688 (manufactured by Bosch Sensortec) is the first gas sensor with Artificial Intelligence (AI) and integrated high-linearity and high-accuracy humidity and temperature sensors. The integrated gas sensor it's able to detect Volatile Organic Compounds (VOCs), Volatile Sulfur Compounds (VSCs) and other gases as carbon monoxide (CO) and hydrogen in the ppb (part per billion) range.

The new BME 688 sensor its backward compatible with BME680. Additionally, to all features of the BME680, the BME688 has a gas scanner function. In standard configuration, the presence of VSCs is detected as an indicator for e.g. bacteria growth. 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.

BME688 sensor main features:

• ambient range for operation -40 ~ +85C, 0%-100% r.H., 300-1100hPa
• gas sensor major outputs (via BSEC) IAQ, bVOC & CO2 equivalents (ppm), gas scan results (%) & intensity level
• sensor to sensor IAQ deviation +-15% / +-15IAQ
• relative humidity accuracy tolerance / hysteresis +-3% / <= 1.5%
• absolute temperature accuracy +-0.5C (at +25C)
• pressure sensitivity error +-0.25%
• Bosch Sensortec BME688 datasheet

s-Sense BME688 I2C sensor features:

• compatible with Arduino (all), Raspberry PI (all) and other SBC / MCU
• input voltages between 3.3-5V
• I2C interface, 3.3-5V auto - no need for an external adapter - [default I2C voltage follows the Vin powering voltage]
• I2C voltage option via solder jumper [Eg.: power at 5V and I2C at 3.3V; power and I2C at 2.2V]
• alternative sensor I2C addresses via solder jumpers
• Arduino C, Raspberry PI [Python] software support
• compatible with itbrainpower.net xyz-mIoT boards(Arduino Zero like)
• big soldering pads on 2.54 mm [0.1"] pitch for standard row header / connector
• 13x27mm, around 2grams

s-Sense BME688 I2C sensor datasheets, resources and howto:

• s-Sense BME688 manufacturer page
• Arduino (3.3/5V) step by step basic how to
• RaspberryPI step by step basic how to
• s-Sense BME688 I2C sensor datasheet

This sensor was designed by itbrainpower.net and it is manufactured in EU.

The gas sensor in the BM688 has a broad sensitivity and reacts to most volatile compounds as well as many other gases polluting indoor air. The intensity of the signal typically scales with the chemical reactivity of the gases. In contrast to sensors selective for one specific component, the BME688 is capable of measuring the sum of VOCs/contaminants in the surrounding air. This enables the BME688 to detect e.g. outgassing from paint, furniture and/or garbage, high VOC levels due to cooking, food consumption, exhaled breath and/or sweating.

The IAQ (Air quality index), target gas scanner selectivity, VOC, VSC and other features may be accessed using the "BSEC fusion library" provided by Bosch Sensortec.