Low cost Ultrasonic liquid level indicator

The Portalevel™ Orignal is the entry level, low cost ultrasonic liquid level indicator from Coltraco Ultrasonics. Ideal for low frequency testing and small cylinder use.

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Low cost ultrasonic level indicator


The Portalevel Original is a slightly older technology which we re-launched in 2018 to provide customers on a budget with an effective and trusted solution. This unit is perfect for those who:

        • Do not need to use the equipment regularly
        • Only testing low numbers of cylinders
        • Only need to test small cylinders, normally below 150KG
        • Need to measure CO2 cylinder content
        • Fire servicing company, just starting out and need to keep costs down
        • Asset owners who want an internal method for checking their own cylinders
        • Currently testing cylinders by weighing and need safer, more efficient method

The Portalevel Original comes with all the features you expect from a Coltraco device;

        • High Accuracy – identifies liquid levels to with 1.5mm every time.
        • AUTO-CAL – calibrates the unit on each cylinder at the touch of a button. Increases speed of operation. Reduces user error. Maximises accuracy.
        • Effectiveness on a budget – Lowest cost unit of its type globally delivering best in class performance
        • Technical Support – Provided one-on-one free of charge, with video material, over the telephone, video call or email.
        • Warranty – 3 year warranty covering any manufacturing defect with full replacement in the event of failure

What's in the box

Techical specifications


98 mm x 158mm x 46.6 mm

420 grams


TX/RS sensor with 14mm diamater magnetized head, BNC connector and 1m co-ax cable 

Power Supply

4 x AA 1.5V batteries


LCD numerical display with LED bar graph

Operating Temperature

-20C to + 70 C / 58F to 158F

Power Supply

1 x PP3 9V Battery – 12hours continuous operation 

Operating Temperature

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


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


Download Portalevel Original 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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