(n.) An instrument for taking altitudes, as a quadrant, sextant, etc.
Example Sentences:
(1) The pilots had full aircraft control but were without use of altimeters.
(2) The new probe was built using improved electronics and batteries, and an extra radar altimeter, a device that will fire microwaves at the Arctic and Antarctic ice to reveal its thickness.
(3) Altitude was simulated by a system of gate valves and a vacuum pump, and measured by an altimeter.
(4) The next generation of smartwatches will employ additional technology including the accelerometer, magnetometer, gyroscope, compass, heart-rate monitor, altimeter and an ambient light sensor, to name a few.
(5) The Nabu tracks your motions like most fitness bands with an accelerometer and altimeter, but has two small OLED screens, one for notification icons and one scrolling text screen for messages, emails and other text notifications.
(6) CryoSat-2’s radar altimeter transmitted 7.5m measurements of Greenland and 61m of Antarctica during 2012, enabling glaciologists to work with a set of consistent measurements from a single instrument.
(7) The upgrade to the existing fitness tracking SmartBand monitors activity, steps and sleep using, like myriad other fitness bands, an accelerometer – but also has an altimeter for tracking stair climbs and hikes.