38 Gas Detection Methane detection made easy with extra long distance detector


A new generation of methane selective portable detectors has emerged recently, offering extra-long distance detection capacities. The Gazoscan, manufactured by Gazomat is an instrument capable of detecting methane up to 100m. This opens up new perspectives in the fi eld of natural gas pipeline network monitoring, as illustrated in the following example.


This case relates to a conventional gas distribution network inspection conducted from a mobile leak survey vehicle. The scheduled route includes a bridge over a river where the pipeline crosses underground. Running at a distance of approximately 50m from the bridge, that part of the network is listed as non-accessible and non-surveyable. Driving over the bridge, the survey technician decides to test the laser-based Gazoscan detector. Standing right at the centre of the bridge, he points the laser beam towards the water surface and scans the area between both river banks. As it reaches the middle of the river, the Gazoscan’s alarm sets off powerfully. On the device screen, the reading displayed in ppm/m corresponds to a methane concentration almost 50 times above the levels usually encountered by the operator.


To make sure, the somewhat taken aback technician shoots again with the Gazoscan. Readings however do remain at the same high level. The gas leak detected IS really signifi cant, and yet there are no visible signs in the area - no burnt grass, no dead fi sh, no gas bubbling up to the water surface. Looking carefully, he identifi es gas pipeline markers indicating the presence of a transmission pipeline. Alerted, the services in charge of the transmission network and of the distribution network must urgently determine the leak source. As a fi rst step, the service pressure in the distribution pipeline section is modifi ed and measures taken using the Gazoscan from the bridge. The results quickly show the leak originates from the distribution network. Major repair works are scheduled, comprised of (trenchless) directional drilling over a 2 km distance and the replacement of the leaky pipeline section running under the river bed.


As to the technician involved, he freely admits he will never forget the experience that showed him all the benefi ts and potential of this type of detectors. As he says, ‘the devices are so easy to use and so quick to start up. Wherever pipelines or installations are hard to access, they simply make fi eld inspections easier and more exhaustive, while allowing to keep safe distances’.


Atex and IECEx certifi ed, the methane detector offers an extended range of application in a variety of industries. More information online: ilmt.co/PL/BdZK


For More Info, email: email:


For More Info, email: email:


52651pr@reply-direct.com Mid-infrared light-emitting diodes (MIR LED) from 2800 nm to 6500 nm for gas sensing


The growing demand for permanent monitoring of specifi c molecules in environmental, health, and security applications has created a need for inexpensive and power effi cient light sources.


nanoplus presents continuous-wave Mid-Infrared LEDs (MIR LED) at any customised wavelength between 2800 nm and 6500 nm. The devices feature continuous-wave operation at room temperature, little power consumption, and a relatively small spectral bandwidth. With these specifi cations, they are a broadband, incoherent and cost-effective alternative to lasers for many gas sensing applications. Portable detectors especially will benefi t from their high wall-plug effi ciencies. The mid-infrared LEDs are available on ceramic sub-mount or printed circuit board (PCB).


Read more about the MIR LED specifi cations at https://nanoplus.com/MIRLED.


The wavelength window between 3 μm and 6 μm is a key for high-precision gas analysis based on tunable diode laser absorption spectroscopy (TDLAS). Many trace gases ubiquitous to industrial sites have their strongest absorption bands in this region. They show absorption strengths that are several orders of magnitude higher than those in other infrared areas. This concerns prevalent molecules such as carbon dioxide (CO2


), nitric oxide (NO), or water (H2


hydrocarbons, such as methane, ethane, or acetylene, equally locate their topmost absorbing features at these mid- infrared wavelengths.


Trace gas analysers that take advantage of the molecules’ strongest absorption bands benefi t from a higher detection accuracy, accelerated sensing speed, less noise, and, last but not least, a smaller footprint.


As a laser expert for TDLAS-based gas sensing, nanoplus offers a variety of light sources to industry and research. Figure 1: Spectrum of a nanoplus 4.3 µm Mid-Infrared LED


The nanoplus fl agship product is Distributed Feedback Interband Cascade Lasers (DFB ICL). They are available at any target wavelength between 760 nm and 6500 nm and have an extremely narrow linewidth of typically < 0.1 nm. At top-rated wavelengths, they show output powers up to 10 mW.


Very recently nanoplus introduced high- power Fabry-Pérot lasers in the mid- infrared. The multimode devices reach up to 1 W at wavelengths between 1950 nm and 2350 nm. They are packaged on a submount with an AlN carrier. Possible applications include the medical sector, pumping of solid-state lasers, or materials processing.


Finally, Superluminescent Diodes (SLD) complete nanoplus portfolio of light sources in the mid-infrared. Designed at any customized wavelength from 760 nm to 2900 nm these broadband devices combine the proven beam quality of nanoplus DFB lasers with the large spectrum of LEDs.


nanoplus is a fully vertically integrated company. They control the entire process chain from design to the packaging at their two ISO 9001:14001 certifi ed production sites in Germany. This enables them to provide customized solutions for any client. Do not change your ideas, let them deliver a light source that fi ts your application.


More information online: ilmt.co/PL/YpqW For More Info, email:


54605pr@reply-direct.com email:


IET ANNUAL BUYERS’ GUIDE 2022/23


For More Info, email: email:


O). Most


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96