What technology does an electric altimeter utilize to measure altitude?

An electric altimeter primarily uses electronic sensors to detect changes in atmospheric pressure to measure altitude. This type of altimeter operates based on the principle that atmospheric pressure decreases with an increase in altitude. The sensors convert the air pressure exerted at a specific altitude into an electrical signal, which is then processed to display the altitude. This technology is particularly reliable and widely used in aviation and in various altimeter systems because it allows for quick and accurate readings of altitude changes in response to pressure variations.

Other technologies mentioned, like GPS signals, are typically associated with GPS altimeters, which use satellite data rather than atmospheric pressure. Barometric sensors may also suggest the use of pressure measurements; however, they are more generic and don't specifically highlight the role of electronic sensors in the measurement process. Ultrasonic waves are unrelated to altitude measurement in aviation altimeters. They are more commonly used in sonar technology for depth measurement, not for determining altitude based on atmospheric conditions.