Depth gauge and Depth finder

Depth gauge noun - A gauge for measuring the depth of grooves or holes or other concavities.

Depth finder and depth gauge are semantically related in sounder topic. In some cases you can use "Depth finder" instead a noun phrase "Depth gauge".

Depth finder noun - Navigational instrument used to measure the depth of a body of water (as by ultrasound or radar).

Depth gauge and depth finder are semantically related in sounder topic. You can use "Depth gauge" instead a noun phrase "Depth finder".