General Monitors' Flame Detector receives FM approval
LAKE FOREST, CA - October 13, 2006 - The Multi-Spectral Infrared (MSIR) FL4000 Flame Detector from General Monitors has been certified by Factory Mutual (FM) for application in hazardous environments. The FL4000, with its MSIR sensor that incorporates neural network technology (NNT), provides highly reliable flame monitoring with false alarm immunity, a wide field of view (FOV) and the industrys longest extended range.
The FL4000 Flame Detector gives process and plant engineers a new tool in protecting people, equipment and facilities from dangerous hydrocarbon flame sources. It provides performance and reliability while minimizing operational costs associated with unreliable flame detection due to false alarms.
Designed with a reliable NNT flame discrimination algorithm, the FL4000 detector is immune to false alarms while at the same time offering extended range (up to 230 feet) and wide field-of-view (FOV) characteristics (100° at 50 feet). For example, the new FL4000 MSIR flame detector provides false alarm immunity to arc welding as close as 5-15 feet. Other features include built-in COPM (Continuous Optical Path Monitoring), a self-testing feature designed to check the optical path integrity of the detector elements and the related electronic circuitry once every two minutes. Serial ports allow up to 128 units (247 using repeaters) to be linked up to a host computer using the MODBUS RTU protocol.
The FL4000 combines an optical MSIR sensor array with NNT processing. NNT is based on artificial neural networks (ANN), which are mathematical models of biological neurons in the human brain that correlate given signal patterns with target flame conditions. The optical IR sensor array and the neural network function together as an adaptive and intuitive decision-making mechanism with boundless optimization capability. The resulting flame detector provides the industrys most reliable discrimination between actual flames and costly false alarm sources.
The MSIR sensor array in the FL4000 allows the detector to sample different IR spectral areas to detect a flame. Each sensors analog signal is sampled and then converted into digital format for initial signal pre-processing to extract time and frequency information. The time and frequency information are used by the FL4000s proprietary neural network classification algorithm to identify if input IR signals are emitted from a flame or non-flame source. The flame or non-flame decision is then reported as an output via LEDs, relays, and MODBUS.
Flame detectors prior to the FL4000s introduction were prone to false alarms caused by arc welding, hot piping, reflected sunlight, and other false alarm sources. These legacy types of flame monitoring systems rely on a limited set of rules to detect fires. While they meet basic flame detection needs, they are susceptible to nuisance false signals that cause unnecessary emergency shut-downs and time-consuming plant re-start activities.
Because of its accurate and reliable flame detection scheme, the FL4000 sets a new standard for performance, reliability, safety, and value. Furthermore, the FL4000s ability to differentiate spectral radiation emitted by actual flames from that emitted by background ambient radiation is exceptional. This differentiation is extremely crucial, as failure to do so results in either undetected fires, or more commonly, nuisance false alarms.
About General Monitors
Founded in 1961, General Monitors is a manufacturer of combustible gas, toxic gas and flame detection monitoring products of the highest quality. The company has been third-party certified to ISO 9001:2000 requirements. Corporate headquarters in Lake Forest, California comprise a modern engineering design center, R&D, manufacturing, sales and service complex. A facility in Galway, Ireland supports the EU with engineering design, R&D and manufacturing. Sales and service offices are maintained in Houston, Texas, Singapore, the United Arab Emirates, and the United Kingdom.
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