| 摘要 |
instrumentation engineering, devices monitoring level of liquid in technological tanks. SUBSTANCE: indicator of position of level includes sensitive element with piezoelements of excitation and control, attachment unit, rod, converter with current key. It is supplemented with companion elements tied up together with one end and connected to converter. Holders carrying piezoelements of excitation and control are put on other ends of companion elements at distance of working clearance. Companion elements and holders are made of sound-conducting material insensitive to corrosive liquids. Converter incorporates former of excitation pulses, amplifier-former, first and second time controllers, time counting unit, state analyzer and former of control signal. EFFECT: enhanced reliability of activation and expanded application field of indicator. 2 dwg
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