Very simple continuous level meter with capacitive transducer for cryo
genic liquids (LO2, LN2 and LHe) is presented. The principle of the le
vel meter operation is based on the phase-locked loop (PLL) technique
of capacity measurements which results in a high linearity and good st
ability of the level measurement. (C) 1998 Elsevier Science Ltd. All r
ights reserved.