Tank level sensor for ships
(pressure) BESI Marine Systems
PESS

The system consists of Gauge Heads, ready assembled with air-throttle valve, non return valve, and electronic pressure transmitter IP 68. The gauge head to be mounted to a yard supplied 1 measuring pipe, which is guided into the corresponding tank to a level 3 cm above tank bottom. The Gauge Head is provided with a 12 mm cutting ring connection for connection to a common working-air circuit with supply-air pressure reduced to 3 to 3,5 bar. By the throttle valve the air bubble flow is reduced to max. abt. 30 ltr./h to the tank or draft measuring point. The non-return valve assembled with the Gauge Head secures the air-circuit and the pressure transmitter against tank fluid flowing back into the pneumatic circuit. The signal pick-off is rendered by an electronic pressure transducer type G1-S with ceramic sensor cell with high purity aluminium oxid membrane, providing analog signals 4 - 20 mA corresponding to the air-overpressure in the measuring pipe. Signal generation: capacitive sensor cell with full range individual temperature compensation stored on cell, sensor cell and amplifier in one common housing, zerosetting without influence on span-setting. Tuning: to straight value in excess of max. obtained pressure, allowing easy installation and adaptation to individual tank at indicating instrument.

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