Mass storage tank level indicator

The ideal solution for non-invasively identifying levels of water and clean liquids in large industrial tanks.

Portable Ultrasonic Liquid level Indicator for industrial tanks of 0.5-15metre width

P/N: 3141184-TANK

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Non-invasive level indicator for industrial tanks


An innovative handheld tool to accurately identify the level of contents in large containers between 0.5-15 metre diameter.

  • Quick Testing: Easy to use, instant liquid level detection with very clear LED results for liquid indication
  • Versatile: Applicable for a wide range of tanks & liquids
  • Non-Invasive: Testing through the outer wall (no opening required)

Quickly, safely and easily identify the liquid level in tanks

  • Tank Width Range: 0.5 metres – 15 metres
  • Tank Wall Material: Most common types such as steel, plastic, aluminium etc.
  • Liquid types: Most standard industrial liquids. E.g. water and oils

With clear LIQUID / NO LIQUID result (presence/absence), the Portatank® is accurate to +/- 10mm, providing a safe, quick and accurate method to monitor contents. This adaptable technology can work with liquid levels that fluctuate over time, as well as test a wide range of tanks and liquids. Coltraco’s equipment is designed to improve safety and best practice, ensuring the equipment used to inspect tanks is accurate and efficient.

3 reasons to buy Portatank®

  • For tanks that already have an in-built system, our portable non-invasive technology allows operators to verify liquid levels in tanks with existing in-built level indicators, as some of these can be from an old technology that can be inaccurate such as float level or sight-glass methods.
  • For tanks without any form of liquid level indication, the Portatank®  can detect the liquid levels non-invasively through the outer walls of the tank.
  • Portatank® requires no installation for either application

Case Study

Power Station in USA using Portatank to test Transformer Oil Levels 

What's in the box


Portatank main unit with controls, liquid detection indications, power management and connections 

Ultrasonic transducer with cable and BNC connections 

Oscilloscope which can be connected to the main unit for ease of setup and signal analysis 

Carrying case for ease of transportation, storage and delivery 

Ultrasonic gel for ease of use, large applications and poor condition surface testeing 

Calibration certificate For traceability of accuracy and documenting unit setup. 

Operating instructions We can provide training and technical support via our Video Materials, over the phone or video call but the primary method is through our very clear, step-by-step operating manuals. 

Techical specifications


200mm x 100mm x 70mm



+/0 10mm

Suitable liquids

Water and most clean liquids and chemicals. Please contact technical team for more specific details 

Sensor Options




Dependent on application & wall thickness. please consult with technical team


8 x 1.5V AA Batteries 


Liquid level indication via LED indicators 

Operating Temperature

-10C to +65C / 67F to 160F


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


Download Portatank Brochure

For basic product information, please find below. If you have any other questions, please contact us directly.

Frequently asked questions

What materials can the Portagauge 5 test?

The portable ultrasonic thickness gauge can test any type of metal and most hard plastics. The most popular metals include steel, aluminium, copper and popular plastics include PVC, Polyethene and fibreglass to name a few!

How accurate is the Portagauge 5?

The Portauage 5 is accurate at testing true material readings (ignoring surface coatings) to within 0.01mm

How to test sprinkler pipes?

The Portaguage 5 can be used to test any sprinkler pipe or other metal piping to identify areas of corrosion, locations where there has been considerable erosion, areas of fungal deterioration and other forms of metal ware. The testing process involves carrying out a series of spot checks along the bottom of the pipe. It is on the bottom of the pipe where liquid will naturally pool and thus where you are much more likely to have areas of heavy corrosion. The user simply goes down the entire length of the sprinkler pipe and continually monitors the pipe thickness and the waveform. Both should be consistent along the full length of the pipe. As soon as the thickness or the waveform begin to deviate significantly, (and they will normally do so together) the equipment has identified an area likely to be compromised and thus further physical & visual inspections will be required.

Do I need training to use the Portagauge 5?

This equipment is incredibly easy to operate, and no dedicated training is required in order to use the unit. We provide operating instructions which is normally enough to provide an operator with confidence and the required knowledge. However, every Coltraco unit comes with free technical support for the lifetime of the equipment so if you do need any further assistance, our technical team are on hand to support

How long does it take to deliver the portable thickness gauge?

These units are almost always available ex stock from the UK. Delivery to the UK is normally next day, Europe in 2 – 3 days and most of the rest of the world in 3 – 4 days from order. Please contact our sales team for an update on availability and for any other questions.

I don’t need to ignore the paint layer. Will this still work for my needs?

The short answer is yes and normally triple echo thickness gauge technology can be used for any thickness measuring applications. We do also offer our Portagauge 3 technology however which uses single echo technology and will measure paint & material as one reading.

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