The general purpose ultrasonic level transmitter provides continuous level measurement up to 18.0’ (5.5m) with a 4-20 mA signal output, and is configured via our free WebCal software. The level sensor has 4 programmable relays with selectable hysteresis and fail-safe logic. The embedded level controller can lower cost by replacing external control hardware. This non-contact liquid level sensor is ideally suited for corrosive, sticky or dirty liquids, and is widely selected for day tank, skid, IBC, sump and process tank level applications.


  • Level detection, switch and control functions up to 18’ (5.5m)
  • Configuration is fast and easy via WebCal software and USB adapter
  • Narrow 3” beam width and short 8” dead band optimized for bulk tanks
  • Four programmable relays for switch, pump or valve control and fail-safety
    • 1 pump or valve with 3 alarms
    • 2 pumps lead-lag with 2 alarms
    • 2 pumps duplexing with 2 alarms
    • 4 independent switch point alarms
  • PVDF transducer and 6P polycarbonate enclosure for corrosive liquids
  • Automatic temperature compensation for accurate measurement


P/N Description From
DL34-00 5.5m (18’) range, 2″ NPT, w/o Fob $800.00
DL34-01 5.5m (18’) range, 2″ NPT, w/Fob $865.00
DL34-10 5.5m (18’) range, 2″ G, w/o Fob $800.00
DL34-11 5.5m (18’) range, 2″ G, w/Fob $865.00


WebCal software is a PC utility program that enables users to easily configure and test compatible Flowline level sensors to their measurement and control requirements. Download your free copy.


Range: 18’ (5.5m)

Accuracy: ± 0.2% of range

Resolution: 0.079” (2mm)

Dead band: 8” (20cm)

Beam width: 3” (7.62cm)

Configuration: WebCal® PC Windows®, USB 2.0

Memory: Non-volatile

Supply voltage: 24 VDC (loop)

Consumption: 0.5W

Loop resist.: 400Ω max

Signal output: 4-20 mA, two-wire

Signal invert: 4-20 mA or 20-4 mA

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

Contact type: (4) SPST relays

Contact rating: 60 VA, 1A maximum

Contact fail-safe: Power loss: Hold last, Echo loss: Open, close or hold last

Hysteresis: Selectable

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

Temp. comp.: Automatic

Ambient temp.: F: -31° to 140°, C: -35° to 60°

Pressure: MWP = 30 PSI (2 bar)

Enclosure rating: Type 6P, encapsulated, corrosion resistant & submersible

Encl. material: Polycarbonate

Trans. material: PVDF

Cable jacket mat.: Polyurethane

Cable type: 9-conductor, shielded

Cable length: 48” (1.2m)

Process mount: 2” NPT (2” G)

Mount gasket: Viton®

Classification: General purpose

Compliance: CE, RoHS

Approvals: cFMus


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.