noun
tide gauge
A scientific instrument for measuring sea level changes. Cross-referenced with 検潮器, a synonym.
See also: 検潮器
検潮儀は潮の満ち引きを記録する装置です。
A tide gauge is a device that records the ebb and flow of the tide.
Compound of 検 (inspect), 潮 (tide), and 儀 (instrument). The exact historical derivation is uncertain, but the kanji transparently describe the device's function.