LEVEL INDICATOR Russian patent published in 1997 - IPC

FIELD: measurement technology, determination of levels of oil products in tanks of oil handling facilities and of water in reservoirs of water supply systems. SUBSTANCE: level indicator includes measuring pulley with balancing spring of constant moment and float with negative buoyancy coupled to measuring pulley with the use of flexible element, reduction gear which driving axis carries pulley of non-rigid coupling with flexible element and which driven axis has code element of reading device provided with two pairs of light guides brought out to code element for provision of optical contact through two rows of information marks made in the form of through holes. Reading device is fitted with source of luminous flux and with two photoconverters connected to electron unit for formation and indication of output signal incorporating time delay line, two valves, logic AND gate, two logic OR gates, two electron keys and reversible counter. EFFECT: expanded application field, increased operational reliability. 5 dwg