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"How do smoke detectors intercommunicate?"  20 February 2001.  HowStuffWorks.com. <http://home.howstuffworks.com/home-improvement/household-safety/fire/question576.htm>  11 February 2012.
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Prices: Smoke Detectors

  • Smoke Alarm Guard 4x7&quot;
    Smoke Alarm Guard 4x7"

    Protects alarms against possible damage Ideal for public areas, garages, workshops, etc Circular and may be used with carbon monoxide detectors of equivalent size Screws into wall or ceiling (Screws not provided) Size: 4 H x 7" ", Manufacturer: Log

    $24.54

  • Simplex Fire Alarm Photoelectric Smoke Heat Sensor Detector Head 4098-9701
    Simplex Fire Alarm Photoelectric Smoke Heat Sensor Detector Head 4098-9701

    NEW SIMPLEX FIRE ALARM PHOTOELECTRIC SMOKE HEAT SENSOR DETECTOR HEAD 4098-9701 SEE PHOTOS ABOVE FOR DETAILS AND ITEM SPECS Visit My eBay Store: Electrical Emporium BUYERS NEEDING FREIGHT QUOTES, PLEASE E-MAIL OR CALL FOR ACTUAL FREIGHT COST. 856-541-8884 YOU MAY PICK IT UP AT OUR SHOP: 430 CHELTON AVE. CAMDEN, NJ 08104, OR HAVE IT SHIPPED UPS OR USPS. SHIPPING CHARGES ARE CALCULATED BY ZIP CODE 856-541-8884 (FAX 856-541-8885) HOURS OF OPERATION ( 7AM - 3PM EASTERN )UPS PICKS UP AT 1:00. USPS PI

    $68.00

  • Sargent 1563 Electromagnetic Double Floor Door Holder
    Sargent 1563 Electromagnetic Double Floor Door Holder

    Floor Mount, Double Door Designed for use with self-closing fire and smoke barrier doors Used independently or with any fire or smoke detector system When de-activated, helps control the spread of fire and smoke by automatically releasing doors from an open position for simultaneous closing Fail-safe device: When electrical power fails doors will release to close automatically Designed to work with SARGENT door closers Recommended vertical location is on top rail of door ??? within 6" of lock stile edge 1" (25mm) extension included standard to increase armature projection to 2-5/8" (67mm) Sprayed Aluminum Enamel (BHMA 689) finish

    $334.16

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