The Model FM Flare Monitor prevents smoke before it is produced, rather than reacting to smoke.
The monitor monitors the ratio of carbon to oxygen within the flame sends a continuous signal to the systems PID or other controller that activates a control valve to modulate the amount of added air or steam as needed. When the oxygen is scarce, the plant controls add oxygen to the flame to prevent the formation of soot. Narrow-band infrared filters ensure that the output is reliable even through dirty optics, fog, rain, and snow, within limits. In addition, it is unaffected by the introduction of steam. For facilities that use steam, another benefit is that no steam is wasted. Standard features include through-the-lens sighting and an adjustable swivel bracket that facilitates installation and alignment. The sensor's dual-wavelength technology ensures a large target area, further facilitating alignment. The unit, which is available with a standard (NEMA4/IP65) or rugged (NEMA7/ATEX/IECEx IIB+H2) housing, can be mounted at ground level, optimal working distance within 1200 feet (365 meters) with a maximum distance of 1800 feet (550 meters). The strength of the measured signal decreases with the square of the distance. Optical resolution is D/17 (60 feet at 1,000 feet).
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