Description

BME680 Environment Sensor

The BME680 offers all the useful environmental sensing in one small package. This little sensor contains sensing for temperature, humidity, barometric pressure and VOC gas. All over SPI or I2C.

BME680-MOD-000

Just like the BME280 and BMP280, this precision sensor measures humidity with ±3% accuracy, temperature with ±1.0°C accuracy, and barometric pressure with ±1 hPa absolute accuracy. Due to the relationship between pressure and altitude (with excellent pressure measurements), you can utilize this pressure measurement for altimetry with an accuracy of ±1 meter. The BME680 goes a step beyond by including a small MOX sensor. The heated metal oxide changes resistance based on the volatile organic compounds (VOC) in the air. As results, the sensor can be used to detect gasses, alcohols such as Ethanol and Carbon Monoxide and also perform air quality measurements.

Please Note: it will give you one resistance value, with overall VOC content, but it cannot differentiate gasses or alcohols.

Quick Spec

General

Supply Voltage: 3.3 / 5V
Sleep Current: 0.15 ~ 1uA
Standby Current: 0.29 ~ 0.8uA
Start-up Time: 2ms
Operating Temperature: -40 ~ +85°C
Dimensions: 16 x 11mm

Gas Sensor

Gas Sensing: Detects VOCs like Ethanol, Alcohol, and Carbon Monoxide, providing overall VOC content but not distinguishing between gases.
Supply Current: 9 ~ 18mA
Response Time: ±0.75s
Resolution: 005 ~ 0.11%
RMS: 1.5%

Humidity Sensor

Operating Range: 0 ~ 100%r.H.
Accuracy: ±3%r.H.
Hysteresis: ±1.5%r.H.
Resolution: ±0.008%r.H.
Long-term Stability: 0.5%r.H./year

Pressure Sensor

Operating Range: 300 ~ 1100 hPa
Accuracy: ±0.6 hPa
Resolution: 0.18 Pa
Sampling Rate: 157 ~ 182 Hz
Long-term Stability: ±1 hPa

Temperature Sensor

Operating Range: -40 ~ +85°C
Accuracy: ±0.5 ~ 1°C
Resolution: ±0.01°C
RMS Noise: 0.005°C

Variability and Calibration

Please note this sensor, like all VOC/gas sensors, has variability and to get precise measurements you will want to calibrate it against known sources! That said, for general environmental sensors, it will give you a good idea of trends and comparisons. We recommend that you run this sensor for 48 hours when you first receive it to "burn it in", and then 30 minutes in the desired mode every time the sensor is in use. This is because the sensitivity levels of the sensor will change during early use, and the resistance will slowly rise over time as the MOX warms up to its baseline reading.