cartesian diver manostat

cartesian diver manostat

[kär′tē·zhan ¦dīv·ər ′man·ə‚stat]
(engineering)
Preset, on-off-control manometer arrangement by which a specified low pressure (high vacuum) is maintained via the rise or submergence of a marginally buoyant float within a liquid mercury reservoir.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.