Background noise surveys

To ensure optimal detection coverage of the ultrasonic (acoustic) gas leak detectors, it is important to have an indication of the ultrasonic background noise in all locations where ultrasonic gas leak detectors are going to be installed. That means that before setting the trigger level and installing the ultrasonic gas leak detection system, the background noise should be estimated or measured onsite. This will eliminate the risk of false alarms.
Rule of thumb for correct trigger level setting based on ultrasonic background noise are described in the Gassonic Technical Hand Book, and can be defined either by so called onsite mapping survey, or by using the guide lines in the Technical Hand Book.
If the plant is not yet constructed an ultrasonic background noise mapping can for obvious reasons, not take place. If this is the case Gassonic's wide experience with measuring ultrasonic background noise levels in various environments enables our engineers to make reliable predictions of optimal detector locations. This is done based on data about the facility in question in close cooperation with our clients.
If a real onsite mapping survey seems necessary, Gassonic A/S offers to perform ultrasonic mapping surveys worldwide as a service to assist customers in ensuring optimal performance of the ultrasonic (acoustic) gas leak detection system.


Testing Gassonic ultrasonic gas leak detectors

When detectors have been installed, system commissioning is performed to ensure that the total leak detection system will detect gas leaks in the entire area it is supposed to. During the commissioning, all Gassonic ultrasonic (acoustic) gas leak detectors are tested by means of artificial gas leaks simulated by means of compressed nitrogen.

When commissioning traditional gas detection systems (IR point sensors or open-path detectors), a calibration gas is injected directly into the sensor head to verify that the detector senses the gas correctly. This test will ONLY verify if the gas detector measures the gas concentration correctly, BUT IT WILL NOT give any indication whether the gas detector will EVER detect a gas leak just a few meters away from the gas detector!

When a Gassonic ultrasonic (acoustic) gas leak detection system is commissioned, it is tested by means of REAL gas leaks (nitrogen) in distances up to 20 meters away from the detector. This will verify the leak detection performance of each detector. Gassonic A/S has great experience in commissioning of ultrasonic gas leak detection systems, and can assist clients in doing this. READ MORE about system commissioning


Documentation reports

Gassonic A/S provides detailed documentation of mapping surveys and commissioning in professionel reports customized for each individual customer.

Ultrasonic mapping reports document measuring results. Pictures and technical drawings will propose settings of and installation locations for each individual acoustic ultrasonic gas leak detector in areas of concern.

System commissioning reports will include measuring results as well as verification of leak detection coverage of all ultrasonic (acoustic) gas leak detectors tested with artificial leak test equipment.

Gassonic personnel performing on-site services has offshore safety courses complying with OPITO, NOGEPA and OLF approvals.

For further information about onsite services, please contact Gassonic A/S.



        Detector allocation
        System Commissioning
        Documentation Reports
        Training Course