The Groveley Detection GDU Incus is an ultrasonic pressurized gas leak detector that is an ideal compliment to traditional gas detection technologies and is designed for use in the harshest hazardous plant and offshore environments.

The detector uses four independent sensing heads equally spaced around the lower half of the detector which allows unobstructed sensing and extended gas leak detection range.

The piezo-electric sensor heads are encased in a ceramic housing and sealed against the harshest of environments. Each sensor is free of moving parts and will not age, drift or need replacing during normal working conditions.

The internal environmental control system allows the GDU Incus to operate in the most extreme temperature conditions, from -50 C to +85 C.

The GDU Incus incorporates the "AutoSweep" integral broad-brand self testing and cleaning system. This unique system means each of the four sensor heads can be tested with a true pressurized gas leak to simulate actual site detection. While in cleaning mode, the AutoSweep system helps to eliminate the buildup of contaminants such as sand, oil or ice on the sensors.

GDU Incus Ultrasonic Gas Leak Detector Features

• Certified to ATEX II 2G Ex d e ia II B+H2 T6 and IP67
• Factory Mutual certification pending
• Designed for use with SIL 3 systems
• Self test and clean facility
• Multiple output options, 4-20 mA, HART, Serial
• Enhanced area coverage
• Calibrated for life
• Stainless steel option

The above image shows the audible and ultrasonic sound emissions from a high pressure gas release.

How Does Ultrasonic Gas Leak Detection Work?
Airborne ultrasound is generated when gas leaks from high pressure to low pressure areas, e.g. a compressor release to atmosphere - a pressure differential of as little as 2 BarA is all that is needed.

A pressurized gas leak generates an ultrasonic sound and the GDU INCUS is tuned to specifically monitor these frequencies, enabling it to ignore workplace background audible noise levels, e.g. sound created by generators, compressors, pumps, etc.

Gas Detection that provides AREA COVERAGE

Traditional point type combustible and toxic gas detectors rely on the target gas to travel to the gas detector and into the gas sensing head in order for detection to take place. There are many variables that have a very direct effect on whether detection will take place (wind direction, detector placement, the location of the source of the gas release, the size of the gas release and the distance the gas has to travel to reach the point gas detector). Consequently, a large quantity of point detectors are often required to provide a reasonable assurance that a gas release will be detected.

The GDU Incus ultrasonic gas leak detector "listens" for the sound of a high pressure gas release in an area up to 120’+ in diameter, depending on the background ultrasonic noise levels in your environment.

The above illustration shows the typical area coverage of the GDU Incus.

This "field of detection" coverage allows for the placement of GDU Incus gas leak detectors in an array that provides a high assurance of adequate detection coverage, regardless of wind direction or wind speed.

The "balloon shaped" areas are the areas where GDU Incus ultrasonic gas leak detection coverage is provided.