aneroid liquid-level meter

aneroid liquid-level meter

[′an·ə‚rȯid ¦lik·wəd ¦lev·əl ‚med·ər]
(engineering)
A mechanism to measure fluid depth by pressure of the fluid against a bellows which in turn acts on a manometer or signal transmitter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.