Ultrasonic Level Transmitters

Ultrasonic Level Transmitters provide reliable, cost effective continuous measurement of fluids that do not contain foam, vapors, fumes or gases. Suitable for use in plastic, metal or concrete tanks, sumps, containers or other vessels. Integrated temperature compensation improves accuracy and the transducers, built-in self-cleaning operation reduces buildup or condensation. High efficiency narrow beam technology helps eliminate unwanted echoes from standpipes, tank walls or other structures. Single push button calibration and Gateway software make commissioning quick and easy.


Babbitt Ultrasonics Level Transmitters operate on the Time-of -Flight principle. The sensor generates a pulse that sends a sound wave from the transducer face down to the fluid level. The media reflects the signal and the transit time is converted into a 4/20mA output signal.

The proprietary circuitry uses smart signal processing to lock onto echoes farthest from the transducer face. This allows the unit to ignore peripheral obstructions when mounting close to vessel walls, piping or ladders. Sensors are designed to adapt to the internal tank conditions, automatically adjusting power and receiver sensitivity to any distance and reflecting surface. This technology ensures the same echo is maintained over the entire operating range, enhancing measurement accuracy. See video below for a short demonstration.

Babbitt offers a full range of ultrasonic level sensor models to meet your application needs. Various models, options and features include measuring ranges 5” to 90’, high temperature, high pressure, sanitary connections as well as different power supply choices including 2 Wire Loop with HART communication. External relay controllers with programmable set points and alarms are available.

For ordering information, refer to ordering information below. Not sure what model is right for your application? Fill out and submit the data application PDF. Proper mounting and installation are critical to operation, refer to Owner’s Manual for instructions.

Ultrasonic Level Transmitter

ultrasonic level transmitter


  • 4-20mA or 20-4mA output
  • Offered in 9’ to 90’ measurement ranges
  • Self-cleaning face eliminates condensation
  • Smart signal processing ignores peripheral obstructions
  • Built-in temperature compensation
  • Corrosion resistant PVC transducer with IP68 enclosure
  • Configuration via push button or Gateway software
  • Non-volatile memory-batteries not required


  • Water/Wastewater
  • Food/Beverage
  • Chemicals/Oils
  • Viscous Fluids/Slurries
  • Pharmaceutical


  • Water without foam
  • Liquids without methane, CO2 and H2S
  • Water and solid mixtures
  • Oil without H2S
  • Inks and water based paint containers (low fume)
  • Sanitary applications with CIP



Power: 115VAC/60Hz, 230VAC/50Hz, 12-30VDC or 2 Wire Loop Power
Output: 4/20mA or 20/4mA, 6.1uA resolution 750 ohms, isolated w/ AC supply; non-isolated w/ DC supply
Fuse: 0.125A/250V type 2AG


Process Entry: Threaded per chart
Conduit Entry: ½”NPT – plastic conduit
Transducer: PVC Standard; Teflon Optional
Enclosure: PVC-94VO Standard; Aluminum and Stainless Steel Optional


Temperature: Standard PVC (-40 F to 140 F); Optional High Temp with Teflon Transducer (-40 F to 266 F)
Pressure: Standard Models (15 PSI Max.); Optional HTP Sanitary or special High Pressure sensor (72 PSI)
Approvals: General Approvals CSA and FM; must have Aluminum enclosure


Dead Zone/Range: Depends on model, see chart
Accuracy: +/- 0.25% of span
Lost echo hold time: 30 seconds/output 22mA or 2mA – User programmable

Specifications subject to change without notice


Please fill out and submit an Ultrasonic data worksheet for quotation.

Software Downloads

3 & 4 Wire Communication Software (rev 7.2) → Download Here

2 Wire HART 7 Communication Software (rev 2.8) → Download Here