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Safety
SafEye Open Path Gas Detection for Combustible Gas Hazards
SafEye Open Path Hydrocarbon Gas Detectors, Series 700 and 200, monitor for combustible hydrocarbon gases over an open air ‘path’ of up to 460ft (140m) and can provide alarms prior to a fire or explosion event. The normal unit of measure for open-path detectors is the product of distance x concentration. Typical full scale is 0 – 5
LEL.meters i.e.100%LEL over 1 metre (or 25%LEL over 4 meters etc).
Spectrex’s SafEye ‘Line-of-Sight’ IR Hydrocarbon Gas Detectors feature unprecedented reliability and exceptional detection capability for flammable hydrocarbon gases/vapours in a wide range of hazardous conditions and ambient environments.
The ’flash’ type radiation source ensures immunity to false alarms and the unit functions effectively even in extreme environments, such as fog, rain, smog etc. Heated optics are also available to ensure continued detection in extremes of weather. If the ‘open-path’ is ever completely blocked due to environmental or human intervention, a warning signal will be generated to allow corrective action or investigation.
Alignment is a simple one-man operation using a telescope – no electronic hand held device needed or connecting cables between source and detector units. The wide alignment tolerance ensures that SafEye can tolerate vibration and being misaligned better than other similar devices
SafEye detectors are fully Zone 1, EExd approved to ATEX standards with a full range of system interfaces including analogue mA, HART and RS485 ModBus. A SIL2 version is also available.
Reader Reply Card No Testing Flame Detectors
Using a Spectrex Flame Simulator is the only sure way to perform a full functional test on your SharpEye Flame Detectors and system. It avoids the cost of scaffolding or supports to access the detector as it is able to test at distances up to 29ft (9m) from the detector location.
Spectrex Flame Simulators (certified EExd for Zone 1 hazardous areas) emit electromagnetic radiation in a unique sequential pattern recognizable as fire by the specific SharpEye Flame Detector model. This allows the detector to be tested under ‘real’ fire conditions without the associated risks of an open flame.
Most Spectrex optical flame detectors, including UV, UV/IR, single band IR,
Triple and Multi band IR types, etc., have automatic integral self-tests (BIT) to check window cleanliness and sensor operation. However, the automatic self-test only partially checks the operational readiness of a detector as the actual alarm outputs are not activated (and rightly so as these tests are performed every 15 minutes).
Using an external, portable Spectrex Flame Simulator is the best means to perform a full, functional "end-to-end" test of the Detector and the Fire Protection System without the need to start a real fire (which is not permitted in hazardous areas and can be dangerous in non-hazardous areas).
The Spectrex Flame Simulator is the only non-hazardous and safe method to test the flame detector’s sensors,
internal electronics, alarm activation software, cleanliness of the viewing window/lens and wiring integrity, Importantly, it will also functionally test the flame detector’s critical alarm outputs, whether relay contact activation,
4-20mA alarm output, RS-485 ModBus digital output or HART, the detector and system’s wiring terminals, cabling and its connections.
Reader Reply Card No Detection of Gas Flames Just Got Better!
Until recently, it was difficult to detect industrial gas flames/fires as the radiation output from gas flames is generally much lower than that from liquid hydrocarbon fuels; thus detection distances were limited. However, Spectrex has introduced additions and improvements to its wide range of optical flame detectors to significantly advance this capability.
The Spectrex 40/40I Triple IR Flame Detector can now detect methane and propane (LNG/LPG) flames at up to 30 meters (instead of 18m before). This same detector will detect heptane /gasoline fuel fires at 65m.
The new 40/40M Multispectrum Flame Detector will do the same job as the 40/40I described above but can also detect “invisible”
Hydrogen flames at 30 meters (previously limited to only 5 -7m with other detection techniques).
As the products of a hydrogen fire do not contain CO2, normal IR3 detectors cannot be used and users had to accept the distance limitations of UV/IR type detectors. Now, with additional sensors, the 40/40M can detect both hydrocarbon and hydrogen fires over much greater areas and reduce the number of detectors needed.
In normal circumstances, people cannot see, taste or smell hydrogen gas, which is very flammable and easily ignited - can even self-ignite in some cases. You will not see a hydrogen fire – even up close. You may see a shimmer, like a mirage. Also, little heat is felt near the flame because very little heat (IR) radiation is emitted. As you see and feel nothing, you may even walk directly into the flame with no pre-warning.
Applications include battery rooms, refinery H2 storage, generators, gas plant, fertiliser plants, and compressors. Reader Reply Card No 86 85 84
SharpEye 40/40 Series Flame Detectors offer unmatched performance and reliability - including patented, IR3 (Triple IR) Multi-Spectrum detectors that enable detection of small fires at distances up to 65m, with enhanced immunity to false alarms. These highly specified detectors operate reliably in the harsh conditions of offshore drilling and production platforms, FPSO vessels, fuel loading and storage facilities, LNG and LPG plants and petrochemical plants throughout the world.
The compact and lightweight design (only 2.5kg in stainless steel) offers low-power consumption with a heated lens for continued availability in difficult environments - as well as the reassurance of many 3rd
party approvals: • FM 3260 and EN54-10 for Performance.
• IEC 61508 - SIL2 (TUV) certification to assure reliability.
• ATEX, IECEx, FM, CSA, GOST R and GOST K for Zone 1 / 21 hazardous area locations.
As a result, the warranty period has been extended to a full 5 years.
Spectrex 40/40 Series detectors incorporate an integral automatic self-test that checks the device every 15 mins to ensure correct operation. The 40/40 Series offers many interface options for maximum compatibility with all control and fire detection systems – including 0-20mA, dry relay contacts, RS-485 ModBus and HART.
The certified operating temperature range has also been extended. The detectors will now operate reliably in temperatures from -55ºC to + 75ºC (with an option for +85ºC) allowing their use anywhere in the world.
The SharpEye 40/40 Series includes the model 40/40I flame detector using the well-proven triple IR (IR3) technique, thus offering the highest immunity to false alarms combined with a massive 65m (215ft) detection distance for hydrocarbon fires with an enlarged cone of vision – 100º horizontal and 95º vertical.
The 40/40 series comprises many detection techniques to suit every situation including triple IR (IR3), Multi IR, combined UV/IR, single IR or UV. Thus, Spectrex can offer unbiased advice on which detector is the correct solution to your detection needs.
The 40/40 Series detectors are programmable allowing the user alter factory default settings. Sensitivity levels, response time, alarm delay, heated lens operation etc are all able to be modified where required, either pre-delivery or post-installation.
Various accessories are available to tailor to your environment and a long range Flame Simulator to allow full ‘end-to-end’ proof testing in the Ex hazardous area at distances up to 9m thus avoiding the cost and inconvenience of scaffolding.
Reader Reply Card No 87
Lots of Approval for Spectrex Flame Detectors!
February/March 2010
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