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Baseefa Ltd

Crowcon’s IRmax now detects up to 29 hydrocarbon gases and vapours

01 April 2014

Crowcon’s IRmax infra-red gas detector detects up to 29 different hydrocarbon gases and vapours. As well as common hydrocarbons, such as methane, ethanol and LPG, the IRmax can now be calibrated for more obscure gases and vapours like styrene, cyclohexane, toluene and paraxylene.

Unlike conventional IR gas detectors, power-efficient IRmax does not utilise heaters to prevent condensation on windows and mirrors. Instead, its optical components are treated with a highly durable hydrophobic coating called STAY-CLIR that completely prevents signal faults due to condensation.

IR type gas detectors work by detecting tiny reductions in transmitted infrared energy due to absorption by molecular resonation in hydrocarbon gases and vapours. It is essential that the light path of the detector is not obscured by condensation or dirt to ensure dependable hazard detection. Conventionally, the windows and mirrors in IR detectors are heated to prevent condensation forming. Although an effective solution, heating components require significant amounts of power to operate and can result in the build-up of dissolved deposits (such as salt).

As the IRmax contains no components for artificially heating optical surfaces, power consumption is dramatically reduced. It requires less than 1 Watt of power, typically 75-90% lower than conventional IR gas detectors. So, a gas detection system using IRmax detectors requires smaller (and lower cost) power supplies and battery back-up systems. Longer cables can also be used and more detectors can be powered on addressable networks.

Another important feature of the IRmax is an optional IR Display, which can be fitted directly to the detector or mounted up to 30 metres away to enable checking and calibration of detectors situated in remote or inaccessible areas. As well as delivering essential non-intrusive calibration functions, the display also provides diagnostic information and features to simplify testing and commissioning.

Featuring dual-wavelength IR sensor technology in a rugged 316 stainless steel package, the ultra-compact IRmax provides rapid, fail-safe detection of potentially explosive hydrocarbons. Capable of operating in temperatures ranging from -40 to +75oC, Crowcon’s IRmax units are used in some of the harshest climates on earth, ranging from the Siberian tundra and the Arabian Desert to the North Sea and the Niger Delta.

Special features of the IRmax include:
•  Compact size – requires less space, effort and time to install
•  Industry standard 4-20mA output
•  Options for HART and RS-485 Modbus communications
•  IEC61508 SIL 2 Sira, ATEX, IECEx, Inmetro, gas and dust zone certifications
•  Hand-held Intrinsically Safe calibrator
•  Automatic optical obscuration monitoring

For more information please visit the IRmax page on Crowcon’s website by clicking on the link below.

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