This sensor has a relative accuracy of 8 Pascals, which translates to about ± 0.5

meter of altitude (compare to the BMP280's 12 Pascal/ ±1 meter). The datasheet

sort of implies they intend this sensor to be used for drones and quadcopters,

to keep altitude stable, but you could also use this for wearables or any project

that wants to track height-above-sea-level. Note that for absolute height you'll

still need to enter in the barometric pressure at sea level, if the weather

changes, but that's true of every altimeter sensor that uses pressure. You can

also measure temperature with ±0.5°C accuracy.

Nice sensor right? So we made it easy for you to get right into your next project.

The surface-mount sensor is soldered onto a PCB and comes with a 3.3V

regulator and level shifting so you can use it with a 3V or 5V logic

microcontroller without worry. Check out the Arduino library to get data out in

under 10 minutes!

TECHNICAL DETAILS

Product Dimensions: 21.6mm x 16.6mm x 3.0mm / 0.9" x 0.7" x 0.1"

Product Weight: 1.2g / 0.0oz

 

                                               https://www.adafruit.com/product/3966 10‐23‐18