Phone: (951) 824-1571
Security Alarm Contact Switches

Magnetic Switch, Contact Switches

Often the first line of defense in a security system, the magnetic door switch is a mechanism recessed in door and window frames. It’s made to trigger alarm and surveillance systems when unauthorized intrusion is detected. Our magnetic contact switches utilize the power of rare earth magnets to create an open or closed loop circuit.

The recessed magnetic switch is most common in residential purposes as it’s concealed and mounted within the materials of the structure. The recessed magnetic door switch is made with the same magnetic reed switch used for surface-mount alarm contacts. Instead of a rectangular housing, recessed alarm contacts have a cylindrical case. This makes them easy to install by simply drilling a hole. The magnets are also made using the same type of round housing.

How a Magnetic Reed Switch Works

The magnetic reed switch is typically installed on the door frame and the magnet that activates the switch is typically installed on the door. Inside the magnetic reed switch, a thin piece of steel – a steel ‘reed’, if you will – is held in position by the attraction of the magnet when the door is closed. When the door is opened, the magnet is taken away from the switch and the spring tension of the “reed” causes it to spring back against the other contact, changing the state of the switch.

Closed Loop, Open Loop Vs. SPDT

Most magnetic reed switches are closed loop, or the switch is closed in its default state. When a magnetic reed switch is designed so that the magnet is close to the switch in its default state, it is considered an open loop style. Another variation is the SPDT, or Single Pole Double Throw magnetic reed switch.

It has both open and closed loops incorporated into its design. Finally, the DPDT, or Double Pole Double Throw has two SPDT reeds in the same contact switch housing, with each having its own common open and closed side.

A popular magnetic switch set Security Savvy offers is the Reed Switch Set, Closed Loop, Steel Door Recessed 3/4" Magnetic Switch w/ Screw Terminals - 10 Pack. This closed loop magnetic reed switch set is 3/4” recessed with screw terminals. It comes hermetically sealed with plated contacts to resist sticking or freezing. It is available in 1/2” standard gap and 3/4"+ wide gap versions. Its short length and composition of PC board type terminals makes installation quick without soldering.

For residential and commercial security applications requiring a discreet surface mount alarm contact, the Reed Switch Set, Closed Loop, Flanged Miniature Surface Mount Magnetic Switch w/ Cable Leads - 10 Pack is just the solution. This miniature magnetic switch set incorporates into most décor without being noticeable.

It is available in standard gap up to 1”, and wide gap up to 1 1/4” with 22AWG cable leads. It is a closed loop circuit configuration with plated contacts to resist sticking or freezing. It has 3M adhesive tape for proper mounting on aluminum, wood, or vinyl.

Security Savvy provides end-to-end security system solutions besides magnetic switches. Our products are manufactured of quality build materials and offered at the most competitive prices. Thank you for visiting our website.

Order from Security Savvy, and upgrade your home or business security system today!

If you have any questions, feel free to give us a call. (951) 824-1571

Products 13-24 of 318
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Alnico V Bare Magnet 1/4”

Price: $6.80-$8.00
Availability: In Stock
Item #: AL-GRI-1741-BM

    Features

    • Bare Magnets
    • Unpainted Or Pole Ends Painted (Toward Switch) Style
    • Size: 1/4” Diameter x 1 3/16” (Approximate)
    • Made In U.S.A.
    Alnico V Bare Magnet W/ Tape

    Price: $11.40
    Availability: In Stock
    Item #: AL-GRI-4357

      Features

      • Bare, Flat Magnets w/ Adhesive Tape On Back
      • Size: 1/8" x 3/8" x 7/8" (Approximate)
      • Made In U.S.A.
      Alnico V Bare Magnet 1/8”

      Price: $9.60
      Availability: In Stock
      Item #: NPNB-5278

        Features

        • Bare Magnets
        • Size: 1/8” Diameter x 0.937” (Approximate)
        • Made In U.S.A.
        Alnico V Bare Magnet 3/16"

        Price: $5.60-$10.80
        Availability: In Stock
        Item #: NPNB-M-19

          Features

          • Bare Magnets
          • Unpainted Or Pole Ends Painted (Toward Switch) Style
          • Size: 3/16" Diameter x 1" (Approximate)
          • Made In U.S.A.
          Alnico V Bare Magnet 3/8"

          Price: $40.00
          Availability: In Stock
          Item #: NPNB-3938

            Features

            • Bare Magnets
            • Size: 3/8" Diameter x 2 9/16" (Approximate)
            • Made In U.S.A.
            Alnico V Bare Magnet 3/8”

            Price: $21.60-$27.20
            Availability: In Stock
            Item #: NPNB-M-16-W

              Features

              • Bare Magnets
              • Unpainted Or Pole Ends Painted (Toward Switch) Style
              • Size: 3/8” Diameter x 1 1/2” (Approximate)
              • Made In U.S.A.
              Biased High Security Industrial Overhead Aluminum Door Switch

              Price: $36.08-$36.76
              Availability: In Stock
              Item #: NPNB-HS200-36

                Features

                • Floor Mount Extruded Aluminum Industrial Overhead Door Switch
                • Closed Loop Or SPDT
                • 36" #22AWG Stainless Steel Armored Cable
                • Biased High Security
                • Mounting Hardware Included
                Box Tamper Switch With 12" Wire Leads

                Price: $71.60-$89.00
                Availability: In Stock
                Item #: AL-GRI-TSW-01

                  Features

                  • Fits Most Bell, Siren and Control Panel Mounting Hole Patterns
                  • Available In Closed Loop, Open Loop and S.P.D.T.
                  • Eliminates False Alarms and Nuisance Service Calls
                  • No Additional Hardware or Adapters Needed
                  • Replace Older Mechanical Tampers
                  • Environmentally Sealed Contacts
                  • Magnetically Plunger Actuated
                  • 12" Standard Wire Leads
                  • No Blades To Corrode
                  • No More Switch Bounce
                  • Longer Service Life
                  • Install and Forget
                  • Use Indoors
                  • Vibration Free
                  • Made In U.S.A.
                  • Color: Black
                  Box Tamper Switch With Built In Shunt And 12" Wire Leads

                  Price: $70.60-$89.00
                  Availability: In Stock
                  Item #: AL-GRI-TSW-01S-ST

                    Features

                    • Fits Most Bell, Siren and Control Panel Mounting Hole Patterns
                    • Built In Automatic Shunt Feature For System Servicing
                    • Eliminates False Alarms and Nuisance Service Calls
                    • No Additional Hardware or Adapters Needed
                    • Replace Older Mechanical Tampers
                    • Environmentally Sealed Contacts
                    • Magnetically Plunger Actuated
                    • 12" Standard Wire Leads
                    • Available In Closed Loop Or Open/Closed SPDT
                    • No Blades To Corrode
                    • No More Switch Bounce
                    • Longer Service Life
                    • Install and Forget
                    • Use Indoors
                    • Vibration Free
                    • Made In U.S.A.
                    • Color: Gray
                    Box Tamper Switch With Built In Shunt And Screw Terminals

                    Price: $69.80
                    Availability: In Stock
                    Item #: NPNB-TS-01S

                      Features

                      • Fits Most Bell, Siren and Control Panel Mounting Hole Patterns
                      • Built In Automatic Shunt Feature For System Servicing
                      • Eliminates False Alarms and Nuisance Service Calls
                      • No Additional Hardware or Adapters Needed
                      • Replace Older Mechanical Tampers
                      • Environmentally Sealed Contacts
                      • Magnetically Plunger Actuated
                      • Screw Terminals (Terminal Block)
                      • Available In Closed Loop
                      • No Blades To Corrode
                      • No More Switch Bounce
                      • Longer Service Life
                      • Install and Forget
                      • Use Indoors
                      • Vibration Free
                      • Made In U.S.A.
                      • Color: Gray
                      Box Tamper Switch With Screw Terminals

                      Price: $71.00-$84.00
                      Availability: In Stock
                      Item #: AL-GRI-TS-####

                        Features

                        • Fits Most Bell, Siren and Control Panel Mounting Hole Patterns
                        • Available In Closed Loop Or Open Loop
                        • Eliminates False Alarms and Nuisance Service Calls
                        • No Additional Hardware or Adapters Needed
                        • Replace Older Mechanical Tampers
                        • Environmentally Sealed Contacts
                        • Magnetically Plunger Actuated
                        • Screw terminals (terminal block)
                        • No Blades To Corrode
                        • No More Switch Bounce
                        • Longer Service Life
                        • Install and Forget
                        • Use Indoors
                        • Vibration Free
                        • Made In U.S.A.
                        • Color: Black
                        Commercial Overhead Door Switch

                        Price: $33.90
                        Availability: In Stock
                        Item #: AL-GRI-7285-O/SPDT

                          Features

                          • For Use On Storage Units With Larger Tracks Overhead Doors And Latch Type Locks
                          • Larger Heavy Duty Vane Switch Shunt
                          • 36" Stainless Steel Armored Cable
                          • Available In SPDT Open/Closed
                          • Latch Type Door Protection
                          • 4.5" x 2.75" x 0.75"
                          • Cost Effective
                          • Easy Installation