The general purpose ultrasonic transmitter provides continuous level measurement up to 32.8’ (10m) with a 4-20 mA signal output, and is configured via its integral push button display module. This non-contact liquid level sensor is well suited for corrosive, ultrapure, sticky or waste liquids, and is selected for bulk storage, tanker truck and neutralization tank applications.


  • Offered in 4 measurement ranges from 9.8’ (3m) to 32.8’ (10m)
  • Configuration is simple via integral push button display module
  • LCD display indicates level in inches, centimeters and percentages
  • Narrow 2” or 3” beam width for applications with limited measurement space
  • Fail-safe intelligence and diagnostic feedback for simple troubleshooting
  • PVDF transducer and NEMA 4X polycarbonate enclosure for corrosive liquids
  • Automatic temperature compensation for accurate measurement


P/N Description From
LU80-5101 3m (9.8′) range, 1″ NPT $800.00
LU80-5161 3m (9.8′) range, 1″ G $810.00
LU81-5101 5.5m (18.0′) range, 2″ NPT $950.00
LU81-5161 5.5m (18.0′) range, 2″ G $960.00
LU83-5101 8m (26.2′) range, 2″ NPT $975.00
LU83-5161 8m (26.2′) range, 2″ G $985.00
LU84-5101 10m (32.8′) range, 2″ NPT $1,145.00
LU84-5161 10m (32.8′) range, 2″ G $1,155.00


Select ultrasonic for chemicals and light weight oils; vibration for wastewater with light coating or scaling; buoyancy for clean water and non-coating chemicals.


Range: LU80: 4” to 9.8’ (10cm to 3m), LU81: 8” to 18.0’ (20cm to 5.5m), LU83: 8” to 26.2’ (20cm to 8m), LU84: 12” to 32.8’ (30cm to 10m)

Accuracy: ± 0.2% of range

Resolution: LU80: 0.019” (0.5mm), LU81/83: 0.039” (1mm), LU84: 0.078” (2mm)

Dead band: LU80: 4” (10cm), LU81/83: 8” (20cm), LU84: 12” (30cm)

Beam width: LU80: 2” (5cm), LU81/83/84: 3” (7.6cm)

Configuration: Push button

Memory: Non-volatile

Display type: LCD, 6-digit

Display units: Inch, cm and percent

Supply voltage: 12-28 VDC

Loop resist.: 500 Ohms @ 24 VDC

Signal output: 4-20 mA, two-wire

Signal invert: 4-20 mA, 20-4 mA

Signal fail-safe: 4mA, 20mA, 21mA, 22mA or hold last

Process temp.: F: -7° to 140°, C: -20° to 60°

Temp. comp.: Automatic

Ambient temp.: F: -40° to 160°, C: -40° to 71°

Pressure: MWP = 30 psi (2 bar)

Enclosure rating: NEMA 4X (IP65)

Encl. material: Polycarbonate

Encl. hardware: Brass & stainless

Enclosure vent: Water tight membrane

Conduit entrance: Dual, 1/2” NPT

Trans. material: PVDF

Process mount: LU80: 1” NPT (1” G), LU81/83/84: 2” NPT (2” G)

Mount gasket: Viton®

Classification: General purpose

Compliance: CE, RoHS


If you want help in selecting a sensor for your application, please submit a Level Questionnaire. An engineer will review your requirements and suggest a product solution via email.