58 Safety Cost effective, flame sensors offer rapid response with improved detection range
Laser Components has specialised in IR sensors for use in flame detection instruments, since opening their doors for business back in 1982. They manufacture lead sulphide detectors at their assembly plant in Arizona and pyroelectric detectors in Florida. A flame will flicker randomly at a rate between 1 and 20Hz when it is burned naturally, modulating any IR signal generated. Pyroelectric and lead sulphide detectors sense this modulated IR light and so can provide a warning of the presence of a flame.
Laser Components’ PB25 PbS detector is a cost effective sensor for this application and generates a response to the presence of a flame in 30ms at ranges of up to 65 metres. The signal to noise characteristic of the IR sensor determines the range and sensitivity of the flame detection instrument and Laser Components have recently added a differential pyroelectric detector to their portfolio of sensors with improved signal to noise performance. This new product provides flame detection appliance manufacturers with an innovative detector with improved range and immunity to electromagnetic interference.
Latest version of portable instrument helps reduce risk by improving site management and event flagging
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plus shows due diligence and best practice ION Science has enhanced its GasClam 2 in-borehole continuous ground gas monitor for better management and prediction of risks associated with ground gas emission and migration.
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The latest version of ION Science’s portable GasClam 2 features a new battery management system which allows up to three months’ continuous, unattended operation in the field, based on hourly sampling. An external power supply option is also now available. Plus new instrument firmware and user software means better informed decisions can be made as a result of more accurate and reliable data.
Designed to fit in to a standard 50mm borehole, the ION Science GasClam 2 allows continuous, unmanned monitoring of ground gases such as methane, carbon dioxide and oxygen concentrations as well as atmospheric pressure and temperature. Optional CO, H2
water depth are available.
With a robust stainless steel design and IP-68 water ingress protection rating, the GasClam 2 is ideal for a range of monitoring applications including landfill perimeters, brownfield site investigation, shale and coal bed, vapour intrusion studies, waste management and refineries and petroleum storage.
It is intrinsically safe and ATEX approved so can be used on sites where there are potentially explosive ground-gas concentrations.
Duncan Johns, Ion Science’s Managing Director comments: “The GasClam 2 is a revolution in gas management and helps reduce risk by improving site characterisation and event flagging. It also provides complete data for site assessments and demonstrates due diligence and regulatory compliance.
He adds: “The GasClam 2 ensures a best practice approach to ground gas monitoring and enables selection of the most suitable site base lining prior to monitoring, as well as during and post operations. It reduces uncertainty whilst increasing confidence by allowing impact to be understood, managed and reported.”
The GasClam 2’s sampling frequency can be set and is variable from every two minutes to daily. Data can be downloaded to a PC. For More Info, email:
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FLIR Systems has published a new application note that describes how an upstream oil and gas company have successfully implemented a continuous monitoring system for their oil pads improving safety and reducing operating costs by 35%.
Fugitive emissions and hydrocarbon leaks at an oil and gas site can cause devastating explosions if they are not caught early. Such problems are not only a risk to the facility, but the surrounding community. The company drills on approximately 300 oil pads, all located in populated areas near homes and schools. If they missed a leak at one of their oil pads or caught it too late, the company would be forced to evacuate thousands of people.
The application note describes how a local systems integrator developed a custom leak detection system based upon a FLIR G300a Optical Gas Imaging camera and map based, user-interface monitoring software that can continuously and autonomously monitor installations.
A primary reason the systems integrator selected the FLIR G300a camera was its ability to detect spectral changes in the atmosphere, as well as adjust for diurnal swings that cross exposure settings. This allows continuous use across seasons, including in fog, rain, or snow. The oil and gas company had an interest in visualizing 20 different hydrocarbons, including benzene, ethanol, methane, and propane. The FLIR G300a had the capability to detect each of these gases and more.
Within the first three weeks of operating the new monitoring system, it detected two leaks that the previous control system didn’t. Using the new FLIR G300a based system – an automation supervisor receives alerts and video on a mobile device while in the field. As a result, the supervisor is now able to immediately react and deploy field technicians who are then able to repair the leaks within 30 minutes of detection.
The new system is enabling the oil and gas company to be more precise with their resources, make better use of their field technicians / maintenance vehicles and provide 24/7 coverage compared to previously looking at installations for just 15 minutes per day. With automated analytics and continuous coverage of assets, leaks can be detected as they occur, not hours or days later. The enhanced virtual monitoring capabilities have led to increased operational efficiency, improved safety, and reduced costs to inspect and operate the site.
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AUGUST / SEPTEMBER •
WWW.PETRO-ONLINE.COM
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Fugitive emissions monitor improves safety and cuts operating costs
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