palladium barrier leak detector

palladium barrier leak detector

[pə′lād·ē·əm ′bar·ē·ər ′lēk di‚tek·tər]
(engineering)
A type of leak detector in which hydrogen is diffused through a barrier of hot palladium into an evacuated vacuum gage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.