The general purpose ultrasonic transmitter provides continuous level measurement up to 9.8’ (3m) with a 4-20 mA signal output and four relays, and is configured via our free WebCal software. Each relay is fully configurable for automatic fill, empty or alarm functions, and the embedded level controller may lower cost by replacing external control hardware. This non-contact liquid level sensor is well suited for corrosive, sticky or waste liquids, and is selected for IBC or drum, cooling tower, day tank, skid or machine, open channel and chemical feed applications.


  • Level measurement, switch and control functions up to 9.8’ (3m)
  • Configuration is fast and easy via WebCal software and USB adapter
  • Narrow 2” beam width and short 4” dead band optimized for small 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
DL24-00 3m (9.8′) range, 1″ NPT, w/o Fob $480.00
DL24-01 3m (9.8′) range, 1″ NPT, w/Fob $525.00
DL24-10 3m (9.8′) range, 1″ G, w/o Fob $485.00
DL24-11 3m (9.8′) range, 1″ G, w/Fob $530.00


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: 9.8’ (3m)

Accuracy: ± 0.2% of range

Resolution: 0.039” (1mm)

Dead band: 4” (10cm)

Beam width: 2” (5.08cm)

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 20-4mA

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: 1” NPT (1” 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.