Ultrasonic Tank Liquid Level Indicator

Portatank® is a handheld, portable, and battery powered liquid level indicator designed to non-invasively, accurately, and reliably measure the level of liquid within a tank. Portatank® is suitable for application on vessels from 0.5m to 15m in diameter and can reliably detect the level of most clean liquids in metal, plastic, or glass vessels. It is also commonly used to detect oil levels in transformers in both pole mounted or pad mounted transformers.

P/N: 3141184-TANK



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Why Portatank®?

Portatank® is a dramatic improvement on conventional level indicators for large tanks in several ways.

  1. It is portable and adjustable, meaning one operator with a Portatank® unit can measure numerous tanks of different sizes, materials, and geometries.
  2. Its non-invasive measurement process removes any risk of contaminating the tank’s contents or compromising the tank’s integrity and it is reliably accurate to within ±10mm.
  3. Portatank®’s cross-applicability allows it to be used with almost any liquid: fuels, oils, water, coolants, and even foodstuffs.
  4. Portatank® is a safer, faster, and more streamlined way to measure liquid level across a wide variety of industrial or commercial contexts.


Handheld Adaptability

Portatank® uses our over 30 years of expertise in ultrasonic engineering to provide a platform which has a broad range of applications in liquid level detection. These include:

  • Fire Suppression Agent Bulk Storage – Compatible with high-pressure Clean Agents (Novec 1230, FM200).
  • Oil Tanks – Including those with complex geometries, eg. in transformers which extends to pole mounted and pad mounted ones.
  • Fuel Tanks – Any common fuel including diesel, petrol, kerosene, and more.
  • Coolants – For application in industrial or maritime systems.
  • Water – Including unclean mixtures like waste water or sewage.
  • Many other liquids – liquid foodstuffs, ingredients or liquid chemicals.


Please get in contact with our sales team if you have any questions about Portatank®’s applications.

What's In The Box

  Portatank®: Main Unit
  Portatank® Sensor: 500KHz
  Handheld Oscilloscope: To Verify Measurement Accuracy
  2 x BNC Cables : For Sensor and Oscilloscope Connectivity
  Micro USB Cable: To Connect The Oscilloscope
  Ultrasonic Couplant: Ensures Good Sensor Contact
  User Manual: Guidance On How To Use The Equipment
  Calibration Certificate: Verifies Unit Functionality And Calibration On Dispatch
  Robust Carrying Case: To Store The Equipment

Technical specifications

Technical Specification

168x79x44 mm (L x W x D)

Unit Weight


Verifiable Agents

Water, fuels, oils, and most clean liquids

Wall Material

Single-skinned only, works on most metals, plastics, and glass, etc.

Power Supply

4 x 1.5V AA batteries

Battery Life

6 Hours Continuous Use

Sensor Type

25mm diameter 500KHz sensor (2MHz option available)

Sensor Connectivity

1m BNC Coaxial Cable

Sensor Frequency

Standard Sensor: 500 kHz

Other Options: 200KHz, 1 MHz, 2 MHz

Operating Temperature

-20°C to +70°C (-4°F to 158°F)


Visual LED indication

Tank Working Range

0.5 metres – 15+ metres


+/- 10mm

Registrations and Approvals

UKCA, CE, Coltraco is ISO 9001:2015 and ISO 14001 registered.

  • Main unit – 3 Year Warranty
  • Sensor –  1 Year Warranty
  • Technical Support – Lifetime of the unit

See the Portatank® in action.

Frequently asked questions

The Portatank® will work on virtually any types of liquids – as long as it is in a liquid state, it can be measured! Density and viscosity affects the measurement only very slightly and can be safely ignored. If you have a particular liquid type that you think has a very high or low density and / or viscosity, please get in touch with us for assistance
If internal structures are present in your tanks, it is possible for the Portatank® to work as the ultrasound signal can still be reflected off your internal structures back to your sensor. Please get in touch with us to discuss your application if you feel you have a challenging application.More complicated structures such as transformers may be filled with internal structures, of various shapes and sizes which can cause the reflected sound waves to be inconsistent. In this instance, it is recommended to test on a section of your tank closer to the edges where you are able to obtain a clear pathway of ultrasound transmission through your tank. The Portatank® sensor is about 25mm / 1” wide and therefore you will
The Portatank® only works with single-skinned tanks as the sensor needs to be in direct contact with the tank wall. Please remove the layer of insulation from the tank before using the Portatank® for measuring the liquid levels

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P/N: 2618949-PSOPLUS


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