Reviews Burglar Bars

Challenger Infrared Safety Beam Sensors

  • MATERIAL - The switch housing is made of ABS flame retardant material and the reed switch is resistant to high temperature and deformation..
  • NORMALLY CLOSED/NORMALLY OPENED - This switch has 3 contact types: NC/NO/COM, you can choose to connect two of the contacts according to your need..
  • ACTUATION DISTANCE - 10-20mm transmitting distance. The contact has fast reflection and accurate detection..
  • WORKING CONDITIONS - When the magnetic door is energized, the voltage is controlled at DC 0V-24V and the load current cannot exceed 150mA..
  • WIDE APPLICATIONS - Work with all access control and burglar alarm systems. Can be installed in wooden or aluminum alloy doors and windows..
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Snap Circuits SC-300 Electronics Discovery Kit with Snap Circuits Jr SC-100 Electronics Discovery Kit Bundle

  • Projects involve AM radio, burglar alarm and more.
  • Requires 4 "AA" batteries (not included).
  • Electrical parts provide students grades 2 and up (age 7+) with hands-on experience designing and building models of working electrical circuits.
  • Snap-together parts require no tools and ensure correct connections.
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10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape

  • Suitable for wooden/glass/plastic material doors.
  • For home burglar alarm system, important kits of home security..
  • Screws terminal connection inside , easy for mounting and connecting to systems..
  • Surface mounted with double side tape , ≥ 15mm operation gap.
  • NC type , normally closed : Switching OFF when door is opened.
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UHPPOTE Wired Shutter Roller Magnetic Overhead Door Contact Output NC/NO with Bracket

  • This Contact Works with Any Access Control or Burglar Alarm System Available.
  • Great for use in family and factory window, door. etc..
  • NO means Normally Open: when the magnet separate, the circuit is conductive( light on ).
  • When the magnet together, the circuit is not conductive (light off).
  • NC means Normally Closed: When the magnet together, the circuit is conductive (light on).
  • When the magnet separate, the circuit is not conductive (light off).
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Nascom - N1175W/ST - Recessed 3/8\ Mini Stubby Press Fit Switch/Magnet Set, Wire Leads (10 Pack)

  • 10 Brown ABS Normally Open Door Contact Switch.
  • Will make Sense Door Closer at Roughly ¾” or 15mm.
  • This Contact Works with Any Access Control or Burglar Alarm System Available.
  • NORMALLY OPEN: When the door or window is open, the contact will give an closed signal and when the door is closed the contact will give a open (circuit) signal..
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Fielect Rolling Door Contact Magnetic Reed Switch Alarm with for N.O. Applications OC-60

  • [Dimension] - Cable Length:460 mm；Sensing Distance: 50-70 mm.
  • Total Size: 105 x 50 x 10mm, 105 x 20 x 16mm (L*W*H).
  • [Normally Open] - NO means Normally Open: when the magnet separates, the circuit is conductive( light on ).
  • When the magnet together, the circuit is not conductive ( light off )..
  • [Material] - The magnetic switch alarm is with durable zinc alloy housing for better rust resistance.
  • [Widely Used] - This magnetic reed switch works with any access control or burglar alarm system available.
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QMseller MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets

  • Work as an anti-theft alarm, ideal for metal door and window.
  • NC means Normally Closed:When the magnet together, the circuit is conductive( light on ).
  • when the magnet separate, the circuit is not conductive ( light off ).
  • These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system.
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Snap Circuits Classic SC-300 Electronics Exploration Kit + Student Training Program with Student Study Guide | Perfect for STEM Curriculum Brown

  • Contains over 60 Snap-Together parts, build over 300 exciting projects.
  • Clear and concise illustrated manual included and available online.
  • Build a Radio, Doorbell, burglar alarm and more, no Tools Required.
  • Includes Snap case 7 heavy duty plastic case with custom foam inserts for housing your Snap Circuits parts.
  • Part of the extremely popular Snap-Circuits educational electronics series from Elenco Electronics.
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Pack of 5 A27 27A 12V MN27A Alkaline Battery

  • ★★★Fresh Continuos Productions and even More lasting life according with the Use. Convenient Blister Pack Allows retailing by Piece. Each....
  • ★★★Primarily used in garage door openers remote controls, car alarms remote controls, burglar remote Controls, Lighters, access control devices,....
  • ★★★Beautiful packing: You will get 5PCS 27A Batteries in Exact Blister Pack.
  • ★★★High Voltage 12 Volts - Highest Capacity & Long Lasting and High Performance Alkaline battery in the Market by the Alkaline High Voltage....
  • ★★★Also Known as: A27, 27A, G27A, LR27A, MN27, MN27BPK, 27GA, GP27A, L828, EL812, EL-812, CA22/ B-1, SNN4176A, ALK27A, A27BP, K27A, V27GA,....
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