water gauge

American  

noun

1. any device for indicating the height of water in a reservoir, tank, boiler, or other vessel.

---

water gauge British  

noun

1. Also called: water glass.  an instrument that indicates the presence or the quantity of water in a tank, reservoir, or boiler feed

---

Etymology

Origin of water gauge

First recorded in 1700–10

Example Sentences

Operators there encountered a similar problem, where one water gauge malfunctioned, and the other gave an accurate reading.

From New York Times • Nov. 16, 2018

He would cover the white spots on the fire box. with an eye on the water gauge, then he would come back to the bench and talk.

From Time Magazine Archive

It consists simply of a straight pipette, A B, to which is affixed laterally, at the upper part, a small U-shaped water gauge.

From Scientific American Supplement, No. 561, October 2, 1886 by Various

Jawn took a final glance at the water gauge, then he swung around and removed his cold pipe.

From The Short Line War by Merwin-Webster

Here Jawn's eyes shifted to the water gauge.

From The Short Line War by Merwin-Webster