FIELD: measurement of level of various substances. SUBSTANCE: radar level indicator includes former of symmetric triangular modulating voltage, modulator, transceiving SHF module with antenna, amplifier of signal of difference frequency and frequency meter connected in series. It is supplemented with circuit fixing extremum, electron key and two level comparators. Input of circuit fixing extremum is connected to output of amplifier of signal of difference frequency and its output is linked to first input of electron key, inputs of first and second level comparators are connected to output of former of symmetric triangular modulating voltage, outputs of level compressors are connected to second input of electron key and output of the latter is connected to input of former of symmetric triangular modulating voltage. Phase jump is prevented during operation of indicator which predetermines increased precision in measurement of level. EFFECT: increased precision in measurement of level. 1 cl, 2 dwg
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