pneumatic altimeter

pneumatic altimeter

pneumatic altimeterclick for a larger image
An aneroid barometer whose dial is calibrated in feet or meters. It has a barometric scale that can be adjusted to any desired reference pressure. Its calibration is based on the specific lapse rate or the change in pressure with height.
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The Lenovo Zuk Edge also has a built-in blood oxygen heart-rate sensor, a pneumatic altimeter and a UV light sensor, according to (http://gadgets.