Short Blanking Mini Ultrasonic Level Transmitter UM-SB

The UM-SB mini ultrasonic level transmitter is the ideal solution for short range liquid level applications that require minimal blanking distance.

  • Short blanking transmitter (2″)
  • Measuring range up to 6 ft (1.8 m)
  • Non-contact continuous level measurement
  • Self-cleaning, maintenance free operation
  • Plug-and-play installation with simple calibration
  • Optional remote monitoring and support with Cellular Gateway

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Continuous Level Measurement for Short Blanking Applications

The UM-SB mini ultrasonic transmitter from ABM is the ideal solution for short range liquid level applications that require a minimal blanking distance. The non-contact ultrasonic transmitter provides continuous level measurement up to 6 ft (1.8 m) with 4-20 mA output standard and simple push-button calibration. The transmitter can be factory configured for a variety of applications with optional RS485 communication, remote monitoring and relay SPDT 8A / 230 VAC for alarm.


  • Water & Wastewater
  • Chemical
  • Petrochemical
  • Food & Beverage


  • Level of small tanks, containers, totes or drums
  • Process tank level and control
  • Inventory level in storage tanks
  • Open channel water or wastewater measurement
  • Wastewater flume or weir flow measurement

High Performance, Maintenance Free Mini Ultrasonic Transmitter.

  • Self-adjusting sensor, automatically eliminates false echoes without user involvement
  • Very uniform polar pattern, negligible side lobes
  • Very uniform near field
  • Very wide frequency bandwidth that produces uniform echoes, short ringing and wide temperature operation
  • No influence from mounting, walls or internal obstructions on sensors performance
  • No influence from temperature, pressure or humidity on measurement
  • Automatically removes condensation and build-up from transducer face
  • Non-contact and self-cleaning nature provides maintenance free operation

Technology Advantage

ABM’s self-adjusting mini ultrasonic transmitters continually monitor conditions in the environment and automatically adjust the transmitted energy, transmitted pulse amplitude and it’s duration, and receiver sensitivity to match to the current tank conditions. This technique allows the receiver to detect only one echo from the measured media while all false echoes are pushed under the noise level and eliminated. The self-adjusting technique also gives the same amplitude of wanted echoes regardless of distance to the target. With one echo only, signal processing is very simple and the certainty of the measured echo being the target is 100%. This makes the ABM transmitters very accurate and reliable. In addition, it enables very fast response (up to 20 echoes per second) for fast moving applications such as conveyor belts.

The transmitters have very narrow and uniform polar patterns. ABM’s ultrasonic technology has a very wide frequency bandwidth that produces uniform echoes, short ringing, and wide temperature operation.

Operation is plug-and-play with ABM sensors. The self-adjusting nature means there is no need for mapping or profiling the environment or downloading several parameters. These signal process operations commonly used by other brands reduce the certainty in the measured materials level. ABM sensors are smart and automatically adapt without user involvement.

Measuring Range: Up to 6 ft (1.8 m)
Technology: Ultrasonic
Frequency: 148 KHz
Calibration: Simple push-button calibration for configuration
Output: 4-20 mA out standard. Optional Relay SPDT 8A / 230 VAC
Power:  12-30VDC (3-wire) operation
Communication: RS485 optional
Remote Communication: Remote monitoring and 24/7 virtual support with optional Cellular Gateway
Ambient Temperature: -40 to 60°C (-40 to 140°F)
Enclosure: PVC
Protection Rating: IP68 (NEMA 6)
Transducer: PVC
Process Connection: 1″ NPT
Process Temperature: -40 to 60°C (-40 to 140°F)
Process Pressure: ≤ 5 Bar (72.5 psi)

Data Sheet: Short Blanking Mini Ultrasonic Level Transmitter

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