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BME680 Sensor Board Temperature, Humidity, Pressure and Gas Sensor Arrives At Adafruit

12:23 pm November 13, 2017 By Julian Horsey

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BME680 Temperature, Humidity, Pressure and Gas Sensor

Makers, developers, electronic enthusiasts and hobbyists waiting for the arrival of the BME680 sensor board from Bosch at the Adafruit online store will be pleased to know that the environmental sensing board is now available. Providing the ability to track temperature, humidity, barometric pressure, and VOC gas from a tiny little add-on. Similar to the BME280 and BMP280 add-on boards, the precise BME680 sensor from Bosch can measure humidity with ±3% accuracy, barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter or better accuracy, say its developers. The BME680 from Bosch is now available to purchase directly from Adafruit priced at $22.50. Adafruit explains more :

The BME680 takes those sensors to the next step in that it contains a small MOX sensor. The heated metal oxide changes resistance based on the volatile organic compounds (VOC) in the air, so it can be used to detect gasses & alcohols such as Ethanol, Alcohol and Carbon Monoxide, and perform air quality measurements. Note it will give you one resistance value, with overall VOC content, but it cannot differentiate gasses or alcohols.

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. For your convenience we’ve pick-and-placed the sensor on a PCB with a 3.3V regulator and some level shifting, so it can be easily used with your favorite 3.3V or 5V microcontroller.

 

Source: Adafruit

Filed Under: Hardware, Top News

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