This tag is used for measuring instruments that display a measurement (of pressure or temperature, for instance) by moving a needle across a scale. Examples of these can be found on post #1483841 (strapped to the girl's thigh) or post #1665641 (on the front of the aircraft). These sometimes take the form of a thermometer-like measurement bar, or a [[dial]].

For video game interfaces that indicate energy, health, progress, etc., see [[health bar]].

For the wide-diameter piercings colloquially called "gauges", see [[plug (piercing)]].
計量器 けいりょうき 計器 けいき