New duct smoke detectors and accessories are now available from this company. The SL-2000 Series duct smoke detectors are available in both ionized and photoelectric versions. The detectors are designed to maximize the efficiency of installation and maintenance and allow for front or rear loading and removal of sampling tubes. The SL-2000 Series is listed for velocities between 100 and 4,000 feet per minute. The SM-501 Series duct smoke detectors are also available in ionized and photoelectric versions. This series is designed for installation in tighter spots and can be linked to as many as 30 other smoke detectors.

Source 1, York International Unitary Products Group, 5005 York Drive, Norman, OK 73069; (405) 364-4040; www.yorkupg.com; www.source1parts.com.

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