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Series_LU_Ultrasonic_level_Transmitter_and_Indicator

Series_LU_Ultrasonic_level_Transmitter_and_Indicator
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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 1

Level transmitters and indicators Series LU Ultrasonic level transmitter and indicator for liquids and solids        No contact with the product Compact design with polycarbonate housing (electronics and display). Remote display available on request Very good resistance in corrosive environments, applications,... Easy to program by means of keyboard-display Level indication with temperature changes Accuracy: ±2 mm (between 0.3 and 2 m) Connections: - Models LU91 / LU921: G2 thread - Models LU93 / LU923: G2½ thread Others on request Materials: PP, PVDF Continuous level measurement, with 4-20 mA output Maximum-minimum level alarms, in 4-wire version (Models L

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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 2

Working principle Technical data A transducer sends short ultrasonic pulses to a product surface. The reflection of these pulses is received back by the same transducer. The ultrasonic waves travel at the speed of sound. The time passed since the emission of the signal until it is reflected on the product surface (T1) plus the time necessary to receive the signal back on the transducer (T2) determines the distance between the sensor and the product. The calculation of this distance is carried out by means of a micro-processor with a powerful and smart software which selects the correct echo...

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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 3

Level transmitters and indicators Series LU PVDF PVDF

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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 4

Operation The installation of the level transmitter must be carried out making sure that the transducer flat face is as parallel as possible to the product surface, in order to guarantee a correct measurement. The minimum distance with respect to the tank wall must be at least 200 mm, avoiding the sensor to be centred in the tank, especially in cases with agitators or formation of emptying cones (Fig. 1). Dead zone The dead zone (ZM) is a zone close to the transducer, where the instrument is unable to make any measurement (Fig. 1). For model LU91 / LU921, dead zone is 300 mm, while for...

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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 5

Level transmitters and indicators Series LU Mud containers Control of containers filling, by means of conveyors belts, with mud coming from water treatment processes. The minimum distance to tank walls must be bigger than 200 mm (Fig. 6). Product inlets or filling areas It must be ensured that the sensor is installed above the product surface, and not around the filling area or close to the product inlet (Fig. 7). In case of partial or total presence of thick foams on the product surface and for open tanks with possible sudden level changes, strong winds or turbulences caused by cyclones,...

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Series_LU_Ultrasonic_level_Transmitter_and_Indicator - 6

R-CT-LU Rev. 3 english version PRESENCE IN MORE THAN 50 COUNTRIES ALL OVER THE WORLD Tecfluid S.A. Narcís Monturiol 33 08960 Sant Just Desvern Barcelona Tel: +34 93 372 45 11 Fax: +34 93 473 44 49 tecfluid@tecfluid.com www.tecfluid.com Quality Management System ISO 9001 certified by Pressure Equipment Directive 97/23/CE certified by ATEX European Directive 94/9/CE certified by HART® is a registered trademark of HART Communication Foundation The technical data described in this specification sheet is subject to modification without notification if the technical innovations in the...

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