Echo sounder and Measuring instrument

Echo sounder noun - A measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return.

Measuring instrument and echo sounder are semantically related. In some cases you can use "Measuring instrument" instead a noun phrase "Echo sounder".

Measuring instrument noun - Instrument that shows the extent or amount or quantity or degree of something.

Echo sounder and measuring instrument are semantically related. Sometimes you can replace phrase "Echo sounder" with "Measuring instrument", this phrases are similar.