The general purpose 3-wire ultrasonic level transmitter provides continuous level measurement up to 24.5’ (7.4m) with a 4-20 mA signal output, and is configured via the integral push button display module. The level sensor has one 10A relay that can be configured on a single set point as an alarm or latched on two set points for automatic fill or empty with fail-safe logic. This non-contact liquid level sensor is well suited for corrosive, ultrapure, sticky or dirty liquids, and is widely selected for bulk storage and day tank level applications.


  • Level measurement up to 24.5’ (7.4m) with 1 pro­grammable relay
  • Configuration is simple via integral push button dis­play module
  • LED digital display indicates level in inches or centi­meters
  • Programmable relay for alarm or automatic fill-empty control
  • PP enclosure rated NEMA 4X with rugged PVDF transducer


P/N Description From
LU30-5003 7.4m (24.5′) range, 2″ NPT, sourcing Discontinued
LU30-5004 7.4m (24.5′) range, 2″ NPT, sinking Discontinued
LU30-5063 7.4m (24.5′) range, 2″ G, sourcing Discontinued
LU30-5064 7.4m (24.5′) range, 2″ G, sinking Discontinued



Range: 6” to 24.5’ (15cm to 7.4m)

Accuracy: ±0.25% of range

Resolution: 0.125” (3mm)

Dead band: 6” (15cm)

Beam width: 8° conical

Configuration: Push button

Memory: Non-volatile

Display type: LED, 4-digit

Display units: Inch or cm

LED indication: Relay status

Supply voltage: 14-36 VDC

Consumption: 200mA maximum

Signal output: 4-20 mA, three-wire

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

Current flow: Sourcing or sinking

Contact type: (1) SPDT relay, latching

Contact rating: 250 VAC @ 10A

Contact logic: Single point: alarm, Two point: latching

Contact fail-safe: Reverts to safe state during echo-loss

Process temp.: F: -20° to 140°, C: -4° to 60°

Temp. comp.: Automatic

Ambient temp.: F: -40° to 140°, C: -40° to 60°

Pressure: 30 psi (2 bar) @25° C., derated @1.667 psi (.113 bar) per °C. above 25° C.

Enclosure rating: NEMA 4X (IP65)

Encl. material: PP, UL94VO

Conduit entrance: Single, 1/2” NPT

Cable length: 9” (22cm)

Cable type: Power & signal: 3-conductor, Relay: 3-conductor

Cable jacket mat.: Vinyl

Trans. material: PVDF

Process mount: 2” NPT (2” G)

Mount gasket: Viton®

Classification: General purpose

Compliance: CE


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.