The Yocto-Altimeter-V2 device is a USB altimeter : it will give you an altitude estimate based on atmospheric pressure. The Yocto-Altimeter-V2 is precise enough to detect 10cm altitude changes. It will also give you the current pressure and temperature. Data can be recorded on the internal flash memory, in order to build a data history that can be retrieved later on over USB.
This circuit has been designed so that the sensor itself can be moved further away from the USB connector by a few meters: simply split the board into two parts and solder a 4-wire cable on the designated pads.
USB cables and enclosures to be ordered separately.