View all newsletters
Receive our newsletter – data, insights and analysis delivered to you


Fixed Ultrasonic Gas Leak Detectors for the Oil and Gas Industry

Energivej 42A,
DK - 2750 Ballerup,
Fax Number

Gassonic is the world leader in developing and manufacturing fixed ultrasonic gas leak detectors for the oil and gas industry. Gassonic has supplied the industry with gas detectors as well as onsite services for more than a decade. Main products include Gassonic Observer, Gassonic Surveyor and Gassonic MM0100. Gassonic is today part of the General Monitors family of companies.

Instant acoustic gas leak detection

Gassonic ultrasonic gas leak detectors detect outdoor hydrocarbon gas leaks by sensing the distinct high frequency acoustic ultrasound emitted by all high-pressure gas leaks.

Based on robust microphone gas sensing technology, the Gassonic detector only needs to detect the sound of the leaking gas in order to operate. Gassonic’s ultrasonic gas leak detectors instantly detect gas leaks as small as 0.1kg/sec at distances up to 20m from the leak source, regardless of ambient conditions, changing wind direction or fast dilution of the gas cloud.

Gassonic Observer gas leak detector

The Gassonic Observer is the most advanced ultrasonic gas leak detector in the market. It is built in a stainless steel 316L flame-proof housing. The detector was developed due to requests from major oil / gas companies asking for failsafe gas detection instrumentation. Therefore the SENSSONIC™ self-test technology is an integrated part of the detector. Besides, it has a 4mA-20mA analogue output, RS485 digital communication interface and it is certified for use in hazardous offshore environments (ATEX, UL/C-UL, IEC Ex, GGTN K).

The Gassonic Observer ultrasonic gas leak detector for instant detection of pressurised gases.
The Gassonic engineers have years of experience assisting customers during allocation and commissioning of the ultrasonic detectors.
Gassonic is dedicated to research and development and to delivering the most reliable and innovative fixed gas detectors.
The Gassonic Observer features integrated Senssonic™ self-test technology for failsafe operation.
The Gassonic detectors are up to SIL 2/3 suitable.

Fixed gas detection instrumentation

Traditional gas leak detection instrumentation was designed to operate when gas builds up to an explosive concentration. For these systems to work, the gas needs to come into physical contact with the detector or an IR source.

However, the harsh environmental conditions found in most oil and gas facilities often prevent gas from reaching the detector. As a result, conventional gas detection systems often fail in turbulent conditions. In a recent report the Health and Safety Executive (HSE) in the UK concluded that only 65% of all hydrocarbon gas leaks in the North Sea were detected by conventional gas detection systems.

Pre-defined gas detection coverage

With ultrasonic gas leak detection an accurate detection coverage range for the individual detector can be determined and verified prior to installation. For detection of industry standard small leaks at 0.1kg/s (ref: methane) the detection coverage will be up to 20m. The exact coverage and positioning of the detectors can be based on an ultrasonic background noise mapping onsite, which trained Gassonic personnel can assist customers with.

Gas leak simulation

As opposed to conventional technologies, it is possible to actually verify the detection radius and thus the performance of the ultrasonic gas leak detectors. This is done by simulating gas leaks by means of a high-pressure hose connected to a portable bottle of nitrogen gas while commissioning the system.

With the new patented detector, the Gassonic Observer, the integrated Senssonic™ acoustic integrity test continuously simulates gas leaks by emitting an acoustic signal every fifteen minutes. If the detector’s microphone is unable to pick up the leak, an acoustic error will be raised on the digital interface or the 4mA-20mA output immediately.

Reducing costs on the gas detection system

One ultrasonic gas detector may replace three to four point gas detectors, which may not only reduce initial spending. Wiring costs and running maintenance will also be reduced dramatically. In particular, this is because the ultrasonic gas detectors do not require regular re-calibration and maintenance, as do conventional detectors.

Oil and gas applications

The Gassonic ultrasonic gas leak detectors can be used as part of the F&G detection system for all kinds of gas processing facilities where the gas pressure is above 10bar (150psi). Typical applications include:

  • Offshore oil / gas platforms
  • Onshore oil / gas terminals
  • Floating production storage and offloading vessels (FPSOs)
  • Gas compressor and metering stations along pipelines
  • LNG / GTL plants
  • Underground gas storage facilities
  • Downstream chemical processing plants (ethylene, methanol, ammonia and propylene)
  • Refineries
  • Gas turbine power plants

Gas leak detection at the speed of sound

Gassonic has delivered more than 3,000 ultrasonic gas leak detectors for instant hydrocarbon gas detection in the petrochemical industry worldwide. The company has dedicated and experienced distributors throughout the world. Gassonic is certified according to ISO9001-2000.

Corrib Gas Field

The Corrib field is a Triassic gas development in the Atlantic Ocean, situated off the coast of Ireland.

Kashagan Offshore Oil Field

Discovered in July 2000, Kashagan was described as the largest field found in the past 30 years, the largest outside of the Middle East, with a projected output close to that of the Ghawar field in Saudi Arabia.

Ekofisk II

The original Ekofisk area development consisted of eight oil and gas fields, namely Cod, Ekofisk, West Ekofisk, Tor, Albuskjell, Eldfisk, Edda and Embla.

Azeri-Chirag-Gunashli Oilfield

The Azeri-Chirag-Gunashli (ACG) field lies 120km off the coast of Azerbaijan in 120m of water and contains 5.4 billion barrels of recoverable oil.

Buzzard Field

The Buzzard field is located in the Outer Moray Firth, central North Sea, 100km north-east of Aberdeen, UK, and 55km from the coast at Peterhead.

Clair Field, Shetlands

When it was discovered in 1977, the Clair field was the largest discovered but undeveloped hydrocarbon resource on the U

Goldeneye Gas Platform

Goldeneye is located 100km northeast of St Fergus. It was discovered in October 1996 with the drilling of well 14/29a-3

Caister Murdoch Phase 3

Conoco planned to embark on the third stage of the development of its Caister Murdoch System (CMS) following the successful completion of a well in March 2001.

Jade Oil and Gas Platform

The high-pressure / high-temperature Jade field is located in block 30 / 2c of the UK North Sea, 17.7km north of the Judy project.

Balder Oil and Gas Field Project, Norway

Balder is located in blocks 25 / 10 and 25 / 11, 165km west of Haugesund, in a water depth of 125m. The field was discovered in 1967, but it was only during the appraisal drilling in 1974 that the major part of the field was discovered.

Gassonic Develops World’s First Gas Leak Simulation Tool

Gassonic has developed the world's first gas leak simulation tool. The new Simulator can be accessed in a trial version on Gassonic's website. The Simulator makes it possible to experience why ultrasonic gas leak detectors are widely used for quick gas leak detection in challenging conditions fou

14 March 2010

Gassonic Ultrasonic Gas Leak Detectors Now SIL 2/3 Suitable

Based on highly stable microphone technology to ensure instant gas leak detection and including Senssonic™ integrated self-test technology, the Gassonic Observer is now rated SIL 2/3 suitable. The Gassonic Observer is the most advanced ultrasonic gas leak detector in the marketplace and designed

31 March 2008

Gassonic Introduces Next Stage in Ultrasonic Gas Leak Detection

Danish company Gassonic A/S is launching a new EEx-i ultrasonic gas leak detector for fixed installations in the petrochemical industry. The new detector is based on more than ten years experience developing and manufacturing ultrasonic gas leak detectors, and an installed base of more than 2.500

29 June 2007

New Ultrasonic Gas Leak Detector Features the Senssonic™ Self-Test

In field instrumentation, particularly in harsh outdoor environments, faults or breakdowns can occur. What is NOT acceptable is when such faults or breakdowns are left un-revealed, especially if safety is involved. To meet the challenge of ensuring no un-revealed failures for our ultrasonic gas l

24 May 2007

Gassonic Ultrasonic Gas Leak Detectors for Giant Kashagan Project

Gassonic A/S, a developer and manufacturer of advanced ultrasonic gas leak detectors for the international oil and gas industry, has won an order for a major part of the safety system in the giant Kashagan Project in Kazakhstan, the largest oil and gas development project in the World.

11 May 2007

United Kingdom

General Monitors
Heather Close
Macclesfield, Cheshire
Lyme Green Business Park
SK11 0LR
United Kingdom


General Monitors
No 2 Kallang Pudding Rd
#09-16 Mactech Building

US, Canada, South and Central America

General Monitors
26776 Simpatica Circle
Lake Forest, CA 92630
United States of America

US Texas

General Monitors
9776 Whithorn Drive
Houston, TX 77095
United States of America

Middle East

General Monitors
PO Box 61209
Jebel Ali, Dubai
United Arab Emirates

Gassonic A/S

Energivej 42A
DK - 2750 Ballerup

NEWSLETTER Sign up Tick the boxes of the newsletters you would like to receive. The top stories of the day delivered to you every weekday. A weekly roundup of the latest news and analysis, sent every Friday. The industry's most comprehensive news and information delivered every month.
I consent to GlobalData UK Limited collecting my details provided via this form in accordance with the Privacy Policy


Thank you for subscribing to Offshore Technology