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Flowline LU81/83/84 Series EchoSpan™ Ultrasonic Level Transmitter

EchoSpan™ Ultrasonic Level Transmitter
LU81/83/84 Series

The general purpose two-wire ultrasonic transmitter provides non-contact level measurement up to 32’ or 10m, and is ideally suited for challenging ultrapure, corrosive or waste liquids. Push button calibrated, the transmitter is broadly selected for atmospheric bulk storage, day tank and waste sump applications. Media examples include wastewater and sodium hydroxide.

• Setup is fast and simple with push button calibration and LCD display
• Offered in three measurement ranges up to 10m with 2” transducer
• 6-segment LCD display indicates level in inch or centimeter values
• 7.6 cm minimum beam width for applications with restricted space
• Selectable display indicates level in air gap or liquid height
• PC/ABS enclosure rated NEMA 4X with rugged PVDF transducer
• Fail-safe intelligence with diagnostic feedback for easy troubleshooting

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Table 1Table 2
Table 1Sensor range
815m (16.4’)
838m (26.2’)
8410m (32.8’)
Table 2Process mount (1) (2)
6G (Metric)
Range LU81: 8” to 16.4’ (20 cm to 5m)LU83: 8” to 26.2’ (20 cm to 8m)LU84: 12” to 32.8’ (30 cm to 10m)
Accuracy ± 0.2% of span in air
Resolution LU81/83: 0.039” (1 mm) LU84: 0.078” (2 mm)
Beam width 3” (7.6 cm) dia.
Dead band LU81: 8” (20 cm)LU83: 8” (20 cm)LU84: 12” (30 cm)
Display type LCD, 6-digit
Display units Inch, cm or percent
Display mode Air gap or liquid height
Memory Non-volatile
Supply voltage 12-28 VDC
Loop resist. 500 Ohms @ 24 VDC
Signal output 4-20 mA, two-wire
Signal invert 4-20 mA or 20-4 mA
Calibration Push button
Fail-safety Selectable 4mA, 20mA,21 mA, 22 mA or hold
Process temp. F: -7° to 140° C: -20° to 60°
Temp. comp. Automatic
Electronics temp. F: -40° to 160° C: -40° to 71°
Pressure 30 psi (2 bar) @ 25° C., derated @ 1.667 psi (.113 bar) per °C.above 25° C.
Enclosure rating NEMA 4X (IP65)
Enclosure vent Water tight membrane
Encl. material PC/ABS FR
Trans. material PVDF
Process mount 2” NPT (2” G)
Mount. gasket Viton®
Conduit entrance Dual, 1/2” NPT
Classification General purpose
CE compliance EN 61326 EMC

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