Model FM flare monitor for smokeless flares efficiently prevents smoke before it is produced, rather than reacting to smoke. Thanks to its special narrow-band infrared filters, Model FM's output is reliable even through dirty optics, fog, rain and snow—within limits. It comes with a standard (NEMA4/IP65) or rugged (NEMA7/ATEX/IECEx IIB+H2) housing, can be mounted at ground level, and its optimal working distance is within 1200 feet (365 meters) with a maximum distance of 1800 feet (550 meters).