Home / Detectors / Duct Detectors / Simplex 565-831 Simplex 565-831 $56.60 Duct Sensor PC Board Availability: Please Call for Lead Time Simplex 565-831 quantity Add to cart Request a Quote This product is already on your Quote Request Browse your Quote Request Factory NewBrand: Simplex FireAlarm.com Part #: 13727 Category: Duct Detectors Manufacturer Part #: 565-831 Tag: PR Specifications Resources Resources Information Weight 1.00 lbs Condition New Brand Simplex ResourcesTrueAlarm Analog Sensing; Addressable Duct Sensor Housings with TrueAlarm Photoelectric Sensor Simplex – Data Sheet