Intrinsically safe for use in hazardous locations, the ultrasonic transmitter provides continuous level measurement up to 18’ (5.4m), and is configured via its integral push button display module. This non-contact liquid level sensor is ideally suited for corrosive, sticky or waste liquids, and is selected for bulk storage, day tank, skid or machine and process tank applications located within a classified area.


  • LCD digital display indicates level in inches or centimeters
  • PP enclosure rated NEMA 4X with rugged Kynar® transducer
  • EasyCal simple push button calibration for all user set points
  • Adjustable dead band and range filters eliminate false echo returns


P/N Description From
LU20-5001-IS 5.4m (18′) range, 2″ NPT $950.00
LU20-5061-IS 5.4m (18′) range, 2″ G $955.00



Range: 6″ to 18′ (15cm to 5.4m)

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: LCD, 4-digit

Display units: Inch or cm

Supply voltage: 12-32 VDC

Loop resist.: 600 Ohms @ 24 VDC

Signal output: 4-20 mA, two-wire

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

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

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

Trans. material: PVDF

Process mount: 2″ NPT (2″ G)

Mount gasket: Viton®

Classification: Intrinsically safe

Compliance: CE

Approvals: CSA: Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III; T3C

Parameters: CSA: Vmax < 32.0 V; Imax < 130 mA; Ca = 0 uF; La = 0 uH

Certificates: CSA: LR 79326


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.