What does 計器 mean?
計器 is a Japanese noun meaning “meter, gauge” in English. It is written as 計器 in kanji, けいき in hiragana, and keiki in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
例えば、温度計や気圧計などの計器は器具です。
For instance, gauges, such as thermometers and barometers, are instruments.