計器

1. Origins, structure, and basic meaning

• Structure: 計器 (けいき) is a noun for a measuring instrument or gauge.
• Basic usage: 計器を確認する checks cockpit instruments; 計器が示す数値 reads the value indicated by a gauge.

2. Common pitfalls and similar expressions

• A measuring instrument and its reading
  • 計器 is an instrument that measures and displays quantities such as speed, pressure, or temperature. Distinguish the device itself from the reading it shows.