Kebetulan saya ditugaskan oleh perusahaan untuk mengevaluasi beberapa penawaran Optical Flame Detectors dari beberapa vendor. Setelah mengamati semua penawaran yang masuk, kok saya jadi tertarik dengan teknologi Triple IR dibandingkan dengan UV/IR.

Pembahasan Oleh : Moderator MIGAS

Dear All,

Kebetulan saya ditugaskan oleh perusahaan untuk mengevaluasi beberapa penawaran Optical Flame Detectors dari beberapa vendor. Setelah mengamati semua penawaran yang masuk, kok saya jadi tertarik dengan teknologi Triple IR dibandingkan dengan UV/IR dengan beberapa alasan :

1. Jangkauan deteksi 4 kali lebih besar.

2. Memperkecil False Alarm.

3. Lebih tahan terhadap pengaruh lingkungan.

Untuk lebih detailnya, silahkan baca pada rangkuman tulisan yang saya buat di bawah ini, diambil dari beberapa sumber. Nggak berbau promosi kok, soalnya yang buat kan user bukannya vendor.

Kalau ada pertanyaan, nanti akan saya teruskan kepada beberapa vendor yang relevan.

Brief Overview

The basic UV/IR detector design is over 30 years old. Over the life of design, manufacturers have made various improvements to the sensors, the microprocessors and to the logic. Collectively, these upgrades have not greatly improved the detector’s performance or the false alarm immunity because the deficiency exists in the limited amount of information provided by the two-sensor design. After 30 years of improvements, the design is still only rated for 1 x 1 gasoline fire at a maximum of 15 meters. And, the design is still well know to false alarm when subjected to simultaneous UV and IR events such as lightning while the detector is pointed at a hot body.

The new IR3 design with three sensors accumulates 50% more data than the dual sensor detector design. The additional sensor data allows the use of a more elaborate logic scheme to exponentially improve fire detection and false alarm rejection. As a result, the IR3 is capable of detecting 1 x 1 fires up to 60 meters.

The IR3 sensors monitor 3 narrow bands within the IR spectrum and ignore the numerous problem associated with detectors using the UV spectrum. The UV spectrum contains the most numerous and high intensity false alarm stimuli for UV or UV/IR detectors.

IR signals also penetrate obscurants known to reduce UV sensor performance; these include salt and fresh water of lens, fog, steam and smoke. Lastly, any oil on the lens of an UV or UV/IR detector will effectively blind the detector from detecting a fire even a fire is happening within a few meters. The IR3 is only slightly effected by such contaminates.

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