Quick Guidance to Operate Hatch Cover Maintenance Device

Coltraco Commitment To :

  • Through-life maintenance support
  • We still maintain units built 20 years ago
  • Extend trade-in credits - replace old units for new
  • UL listing & ABS type approval - Portalevel™ MAX
  • ABS type approval & RINA approval - Portascanner™
  • Be a life-safety technology partner – Permalevel™
  • Certified OEM calibration & ODA service stations

Coltraco manufacture Ultrasonics That Work

Quick Guidance to Operate Hatch Cover Maintenance Device

Coltraco Ultrasonics Limited is regarded to be a world popular ultrasonic manufacturer and supplier, producing a huge variety of products to assist industrial sectors with monitoring and measuring requirements. They are working within this field for more than 20 years for which they have experience with more diversity. The Portascanner Watertight is one of its products, which is also known as watertight integrity testing device. It has two main components – a generator and receiver. The ultrasound generator emits a specific frequency of ultrasound (40,000 Hz). It is magnetic so can be attached onto a wide range of surfaces within sealed areas. The receiver then picks up the signal and converts it into a result indicating W/T integrity.


  • The receiver is tuned to detect a specific frequency of ultrasound.
  • The receiver comes with a sensor rod, which allows a user to scan the entirety of a seal at close range.
  • The receiver has both a visual and audio output which gives off better results for Hatch cover maintenanceand watertight integrity testing.
  • The visual output is shown on the LCD screen of the receiving unit. It is read mathematically and in decibels.
  • There is a numerical representation, which can be changed into a decibel (dB) reading, allowing seals to be tested to certification society standards.
  • There is also a bar graph representation of the strength of the ultrasonic signal, which is being detected.
  • The audio signal is delivered via headphones, which plug into the receiver unit (standard 3.5 mm jack).
  • The receiver uses a process called heterodyning to change the ultrasound signal received into an audio signal, which the user can hear.


  • The generator is placed on one side of a sealed compartment and turned on.
  • The user stands on the other side of the compartment and uses the sensor rod to scan the seal.
  • The receiver displays the strength of detected signal on the screen and the user can also hear it through the headphones.
  • Leak sites will be apparent from increased signal strength
  • This will be shown by an increase in the readings on the screen display and in the volume of the audio signal

Portascanner Functionality

We have mentioned the details of two main functioning unit of this ultrasonic hatch cover tester below:

Generator – Portascanner Watertight

The generator is an ultrasonic generator with three transducers. This will produce a strong signal in one direction i.e. directly from the transducer, which fills the compartment being tested with ultrasound pulses e.g. providing sufficient coverage to fill the hold when the hatch-covers are closed. The generator is permanently fitted with a powerful magnet which allows it to be attached to the vessel’s structure where required. A magnet cover is provided when the magnet is not in use

Receiver – Portascanner Watertight

The receiver uses ultrasonic technology to convert the 40KHz pulses sent by the generator into three easily comprehensible readings: audible, bar graph and numerical which enables the operator to understand if the seal is wholly watertight or to what extent a leak exists.

For further information, Download PDF


CEO Message

Integrity and Science Key to Our Culture of Performance

Dear Coltraco Customers, Strategic Partners and Distributors,

Integrity is our defining value. Performance is its consequence. We understand that our customers have choices, and how we perform determines whether customers choose us. Coltraco’s Code of Ethics does not merely require compliance with laws. It embodies a Commitment to positive behaviours that build trust, promote respect, operate with distinction, with courtesy and global levels of performance, demonstrating our integrity and delivering customer performance.

We honour our commitments, communicate transparently, and act with honour. Ethics are the foundation of our performance culture and our science-based approach. We lead in specific technologies delivering the watertight integrity monitoring of marine structures and the monitoring of fixed liquefied gaseous fire extinguishing systems and the room integrity of protected space to ensure agent hold-times post-installation. We show this by our understanding of the science in them and the mathematics that explain them.

I would like to thank you for your business and for the relationships with our Customers, Strategic Partners, Distributors and ODAs who we value so highly.

My kindest regards,

Carl Stephen Patrick Hunter BA(Dunelm) Hon DSc FRINA FIMarEST MRAeS
CEO & Managing Director
Coltraco Ultrasonics Limited
46-47 Mount Street, Mayfair, London W1K 2SA
United Kingdom

Tel:  +44 20 7629 8475
Fax: +44 20 7629 8477

Call Now : +44 207 629 8475


References in PDF Format


Underwriters LaboratoriesUnderwriters Laboratories


Reference Alpha Fire UK Portalevel MAX Sept 2012

Reference Portascanner-II CSD MOD Albion and Bulwark





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