Continuous liquid level measurements with time-domain reflectometryDescription of the basic principles of radar measurements of cryogenic liquid levels in storage vessels by time-domain reflectometry. The probe consists of a right circular coaxial transmission line positioned vertically in the storage vessel and having holes drilled in the outer conductor to permit penetration of the liquid into the annular gap. RF pulses transmitted through the probe are reflected at liquid/gas interface and returned for sampling at the input. The measured delay of the return pulse is displayed as the level of liquid in the vessel.
Document ID
19740031308
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Cruz, J. E.
Rogers, E. H.
Heister, A. E. (National Bureau of Standards, Institute for Basic Standards, Boulder Colo., United States)