olemus
Merriam-Webster:
2b: an instrument with a graduated scale or dial for measuring or indicating quantity
https://en.wikipedia.org/wiki/Gauge_(instrument)

näiteid
gas gauge -- 1.bensiinimõõtur 2. gaasimõõtur
https://duckduckgo.com/?q=gas+gauge&t=h_&iax=images&ia=images

flow gauge -- kulumõõtur
https://duckduckgo.com/?q=flow+gauge&t=h_&iar=images&iax=images&ia=images

vt ka
- mõõtur (1)