Our mission is to help you deliver the Safesite® and Safeship®.

This means we aim to improve safety for people, assets and infrastructure on land and at sea worldwide across 29 diverse sectors. Find your market sector here.

We do this through our products which focus on liquid level indicationseal integrityflow rate monitoringthickness gauging, and bearing indication.

For the last 30 years we designed handheld, reliable, accurate portable inspection products. We now also manufacture constant liquid level monitoring systems.

PLMAX + oscilloscope

Research & Development

Continuous Innovation is at the heart of our success. We put fundamental science at the heart of our new technologies. With several new product launches a year, we are constantly improving and creating, to assist in our customers’ success.

We manufacture equipment to the highest quality in the UK and delivered with our lifetime Customer Care Commitment and supported by our Global Network.

Our Vision

Our ethics form a huge part of our identity as a company. We believe in treating people the right way and acting with integrity at all times. We believe in creating happiness within our team and sharing this happiness with our customers and partners.

We support initiatives including supporting Women in Business, working against corrupt practises worldwide through the Business Integrity Initiative and ending Slavery at Sea to name but 3 core issues.

Our commitment to good business goes further: ISO14001 for environmental responsibility; promoting Diversity & Inclusivity by signing the Women in Maritime Pledge; committed to the Safety Culture through the UK Chamber of Shipping; signatories to the Armed Forces Covenant and the Northern Powerhouse. Our CEO is a DIT London Export Champion. We recruit talent through Student Engagement.

RFA Lyme Bay


We have been lucky enough over the years to have won numerous awards and nominated for countless more for our technologies and also as individuals within the team. Some of these are included below.

A Few Memorable Moments

May 2020
Launch of Industrial Tank Level Indicator
A brand new innovation, Portatank®, the ideal non-invasive liquid level gauge for tanks 0.5-15 metres.
May 2020
June 2019
CEO honoured with OBE
Dr. Carl Stephen Patrick Hunter awarded OBE for Services to Business and International Trade. (Somerset).
June 2019
April 2019
Won Queen’s Award
The Queen’s Award for International Trade 2019 for 6 years of continuous growth.
April 2019
April 2019
Gained Intrinsically Safe Approval
Portalevel IS: Approved to Zone 1, II 2 G Ex ib IIA T4 Gb standard
April 2019
November 2017
British Innovator
Coltraco named one of “the best of British innovators" by InnovateUK Showcase in Birmingham.
November 2017
June 2016
Launch of Portasteele CALCULATOR
Product launch at London’s FIREX show of the perfect partner to the Portalevel.
June 2016
March 2016
ABS Type Approval
For the Portalevel and Portascanner products, building on UL and RINA approvals.
March 2016
Coltraco designs new products
Introducing new technology to complement the liquid level range with the new Portascanner®.
Company Established
Mr EC Hunter and his Son, Dr CSP Hunter co-founded the company and invented the Portalevel®.


Today the company operates across over 25 customer Safesite™ and Safeship™ Market Sectors including: Shipping & National Ship Management, Naval & Naval Auxiliary Fleets, Shipbuilding & Marine Surveying, Wind Energy, Fire Safety Engineering, Offshore Oil & Gas, Refineries & Petrochemical, Oil & Gas Pipelines, Power Generation, Electricity & Gas Distribution, Solar Thermal energy, Food & Liquid Processing, Fluids Handling, Steel & Aluminium Production, Transformer Operators, Telecommunications & Mobile Phone Operators, Rail & Light Metro Rail, Data Centres & Server Rooms, Pharmaceutical, State-owned Enterprises (SOEs)**, Universities, Laboratories, Luxury Hotels, Hospitals, Libraries & Museums, Mining, Chemical & Petrochemical, Manufacture, Mining.

In technologies our instruments are arranged in 3 groups: A. our compartment and watertight integrity instruments based around Portascanner™, B. our gaseous extinguishing contents instruments based around Portalevel™ , supported by Portasteele™ Calculator which converts liquid level cylinder readings of CO2, FM200™ and NOVEC™ 1230 to agent weights and C. our Portatank™ industrial portable tank level indicator for single-skinned tanks measuring 0.5m to 15m in diameter.We also manufacture a  range of constant monitoring systems, currently focused on (B) above. Our company team, supported by our Regional Heads of Operation, around the world, is one of the most capable you will find and we continually-improve our processes to make us “better-faster-cheaper” for you, our customer.

Our Background

Coltraco Ultrasonics developed the Safeship™ concept, by which simple-to-use and highly-accurate hand-held instruments were developed for crews to use with high periodic use in demanding ergonomic and climatic environments. The company has supported the Royal Navy, US Navy, Royal Canadian Navy, BAE Systems, Babcocks and Trescal (Rolls-Royce) and many other allied Navies for over 25 years.

We are in service in an array of complex and demanding land and marine environments from the Arctic to the Pacific and in-service with nearly 20% of the world’s Commercial ocean-going vessels, 50% of the world’s offshore energy platforms and 1 of the world’s 4 manufacturers of wind energy turbines. We offer free online training for every customer and provide technical support, spare parts and maintenance for our equipment. The company exports 89% of its output to 120 countries. In 2019 our company won The Queen’s Award for Enterprise in International Trade. Members of our company include winners of Lifetime Export Achievement and Young Exporter of the Year Awards for commercial service, whilst others have won Science, Innovation & Research prizes and grant awards. Our company is committed to Maritime & Land Safety, and has won numerous industry Awards in this. Our Chairman is a member of various Government & Industry Committees and Expert Advisory Groups in public service.

We are founder members of Women in Maritime and the Armed Forces Covenant and speak regularly at public and private fora. We now manufacture a range of instrumentation and constant monitoring systems. We also pioneered the Safesite™ concept by which pressurised CO2 & Clean Agent gaseous extinguishing systems are monitored for contents alongside the monitoring of the compartment they design to discharge into, since without the “gas being held” in a space protected by an extinguishing system, it will disperse without containing the fire event.

Join Our Journey

British manufacturer of ultrasonic technologies, exporting to 120 countries and winners of The Queen’s Award 2019.

©Copyright 2021 Coltraco Ltd. All rights reserved.