The new HiTechnic Barometric Sensor can be used to measure altitude since air pressure varies with altitude. The NXT-G block for this sensor includes actions to read altitude as well as to adjust the altitude base pressure and to set the altitude pressure using a known altitude. The NXT-G programs presented in this blog post shown an airplane style altimeter on the NXT screen. Like a real altimeter, the altitude pressure can be adjusted to account for different meteorological conditions.
