Marine Ultrasonic Level Indicator

The Portamarine® provides the ideal solution for ship operators and marine servicing companies looking to carry out inspections for onboard fire suppression systems 

P/N: 2290334-COPM
IMPA: 652777

Marine ultrasonic level indicator


The Portamarine® is the dedicated Marine ultrasonic level indicator, specifically designed for inspecting fire suppression system cylinders and improving fire safety.

The Portamarine® is a marine unit designed for shipboard use and serving the shipping industry and offshore worldwide. It is the reliable, cost effective seventh generation portable ultrasonic liquid level indicator range by Coltraco Ultrasonics.

      1. Hands free testing – the device hangs from a strap around the operators neck which is particularly useful when working in the cramped conditions in maritime vessels.
      2. Cylinder banks of 2, 3 or 4 rows deep –  The devices is supplied with the Multi-Banked Extension rods, allowing the operators to easily inspect 2, 3 or 4 rows of cylinders.
      3. Wide range of agents – Whilst CO2 is the most popular application, the device can also operate on all major liquid agents including FM200 and NOVEC 1230®.
      4. Safer Testing –  This method also completely removes the need for weighing cylinders which is an incredibly time consuming and dangerous method which can often result in damage to the system during inspections.
      5. Comply with Regulations  – IMO SOLAS & FSS Code Chapter – “Means shall be provided for the crew to safely check the quantity of the fire extinguishing medium in the containers.

Safer, Quicker, Accepted, Cheaper

  • Safer: No need to disconnect the cylinders from the manifold with this accurate non-invasive technology (accurate to +/- 1.5mm)
  • Quicker: Hands-free operation and extension rod for banked cylinders
  • Accepted: The Portamarine® comes with  RINA Classification Society Acceptance
  • Cheaper: cut servicing costs by up to 50% against weighing

The Portamarine® also comes with full Coltraco Customer Commitment, including free Training and Technical Support for the life of the unit, 3 Year Warranty with full replacement in the event of any defect, guaranteed trade in buy-back when upgrading to newer devices and with the most proven technology on the market.

What's in the box

Portamarine main unit with the controls, display, sensor connectors, harness points for handsfree use and power management 

Multi-banked extension rod which reaches between cylinders for testing multiple rows of cylinders up to 4 rows deep 

Hand sensor included for ease of use when testing single rows of cylinders. 

Carrying case for ease and safety of transportation, storage and delivery 

Ultrasonic gel for use with heavily corroded or very old cylinders

Calibration certificate to demonstrate proven accuracy and traceability 

How to use

Connect sensor with the BNC connector and turn on the device

Remove any debris such as dirt, peeling paint, or heavy dust. Apply spray of water or ultrasonic gel depending on cylinder condition. 

Using CO2 as an example, place the sensor above the liquid level, press & hold the ‘CAL’ button for 5 seconds. All the LEDs will light up. This indicates gas (above level)

Move sensor down the cylinder in small steps watching the LEDs. When all the LEDs have gone out, you have reached the liquid level.


Techical specifications


  • Height: 168mm
  • Width: 95 mm
  • Depth: 45 mm
  • Weight: 400g


+/- 1.5mm 

+/- 0.125 inch


TX/RX sensor with 14mm diameter head contained with a magnetic sensor application connected by BNC connectors to 1m co-ax cable

Power supply

4 x AA 1.5V battery


LCD numeric digital display with LED bar graph 

Operating temperature

-20C to + 70C

68F to 158F

Enclosure Rating



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


Download Portamarine 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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