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Grey cylindrical ultrasonic sensor with 2 inch NPT threads

Flowline

Flowline LU83-5101 ultrasonic level sensor 26.2 ft range

SKU CH-FE0R-4BK0K

Non-contact ultrasonic sensor measures corrosive or ultrapure liquids up to 26.2 ft with ±0.2 % accuracy and 2-wire 28 V DC output

  • Product typeLevel Measurement
  • Non-contact measurement avoids media contamination with PVDF construction
  • 2 ft range covers deep tanks and vessels
  • ±0.2 % accuracy delivers reliable level data
  • 2-wire 28 V DC loop simplifies wiring and power
  • Operates from -7 °F to 140 °F for harsh environments

Flowline LU83-5101 ultrasonic transmitter

The Flowline LU83-5101 is a non-contact ultrasonic level sensor built for continuous measurement in tanks and vessels. Its PVDF transducer resists corrosive, sticky, waste and ultrapure liquids across a 26.2 ft range with a 3 in beam width.

Suits process engineers monitoring aggressive media

This unit fits applications that need a 2 in NPT mount, 30 psi pressure rating and media temperatures from -7 to 140 °F. It is not for installations requiring a smaller dead band than 8 in, a different connection size or an operating frequency other than 50 kHz.

Range and accuracy drive selection

The sensor delivers a 314.4 in measurement span with ±0.2 percent of range accuracy and 0.039 in spatial resolution. Buyers whose process demands a longer span, tighter accuracy or a higher voltage limit than 28V DC should evaluate other models.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $798.99
Pricier than about 90% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameFlowline
Product typeLevel Measurement

Questions about this item

How do I mount the LU83-5101 and what is the common installation mistake?

Thread the 2 in NPT fitting into a tank opening; the step often missed is keeping the sensor face at least 8 in above the highest liquid level to avoid the dead band.

What maintenance will the LU83-5101 need over time?

The PVDF antenna resists corrosive, sticky and ultrapure liquids, so only periodic visual checks for build-up on the 2 3/8 in face are required.

What limit appears first during continuous operation of the LU83-5101?

The 30 psi maximum operating pressure or the 140 °F media temperature ceiling will be reached before the 28 V DC supply limit under sustained use.

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