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Magnetic Sensors

Magnetic Sensors

The Magnetic Sensor is a device that detects changes in magnetic flux density. Such change in magnetic properties is utilized in security devices such as reed switches. We offer a wide selection of mighty earth magnets and recessed magnetic switches to help you secure your perimeter.

  • Miniature Floor Mount Cast Aluminum Overhead Door Switch Set Magnetic Contact, 2 1/2" Gap
    from $18.84

    Miniature Overhead Door Magnetic Floor Mount Switch Set, 2 1/2™ Gap

    AL-GRI-4708-MC
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature Overhead Door Floor Mount M...

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    from $18.84
  • Pool Alarm Recessed Door Alert
    from $94.48

    Pool Alarm Door Alert - ETL Listed - 289 Series - Closed Loop

    289-1C
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Pool Alarm Door Alert - ETL Listed - 2...

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    from $94.48
  • Miniature "shortie" Recessed 3/8" Diameter Switch Set Magnetic Contact, 1/2"+ Standard Gap, .625" length
    from $41.20

    Miniature 3/8” Recessed Switch Set - 20RS-12/20RS-T Series - 10 Pack

    20RS-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature 3/8” Recessed Switch Set -...

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    from $41.20
  • Magnasphere Surface Mount Switch Set - MS28/MS29 and MS29P Series - 10 PACK
    from $197.40

    Magnasphere Surface Mount Switch Set - MS28/MS29 and MS29P Series - 10 PACK

    MS28A
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Magnasphere Surface Mount Switch Set M...

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    from $197.40
  • Reed Switch Set, 3/8"
    from $32.20

    3/8” Dia. Recessed Switch Set - 2020-12/2020-T Series - 10 Pack

    2020-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description 3/8” Dia. Recessed Switch Set - 10 Pac...

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    from $32.20
  • Miniature Flanged Surface Mount Switch Set - 1" Gap - 200V/140V
    from $39.60

    Miniature Surface Mounted Switch Sets With Leads - 100/110 Series - 10 Pack

    100-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature Surface Mount Switch Sets Wi...

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    from $39.60
  • Rare Earth Magnet Switch Sets
    from $72.60

    Rare Earth Magnet Switch Sets, N Series, Miniature "Shortie" Recessed 3/8in with 12in Leads - Open Loop - 10 Pack

    NPNB-N30RS-12
    GRI

    Description Rare Earth Magnet Switch Sets, N Series, Miniature "Shortie" Recessed 3/8" w/ 12" Leads - Open Loop - 10 Pack (White) Our Mighty Mag c...

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    from $72.60
  • Super Miniature 1/4" Recessed Switch
    from $31.60

    Switch (Only), Super Miniature 1/4" Recessed w/ 12" Leads - 10 Pack

    S50RS-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Switch (Only), Super Miniature 1/4" ...

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    from $31.60
  • recessed Switch Current Controller
    $55.72

    Current Controller with Recessed Switch - Automatic AC Voltage Switching System, UL Listed

    AL-GRI-2042-CC
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable   Description Current Controller/Automatic AC Vol...

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    $55.72
  • Pool Alarm Kit
    from $98.08

    Pool Alarm Kit - ETL Listed - 289-4/DPA-10R Series

    289-4KIT
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Pool Alarm Kit - ETL Listed It's all i...

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    from $98.08
  • 120T/4473 Series 3/4" Switch 3/8" Magnet Recessed Switch Sets
    $28.72

    Magnet Recessed Switch Set - 3/4" Switch And 3/8" Magnet - 10 Pack

    AL-GRI-4473
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Magnet Recessed Switch Set - 3/4" Swit...

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    $28.72
  • High Security Surface Mount Magnetic Switches
    from $211.70

    High Security Surface Mount Magnetic Switches

    GR2707-A
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description High Security Mount Magnetic Switches T...

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    from $211.70
  • Reed Switch Set, Miniature 1/4" Recessed w/ Cable Leads - 10 Pack
    from $57.80

    Reed Switch Set, Miniature 1/4" Recessed w/ Cable Leads - 10 Pack

    AL-GRI-6609-RS
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Reed Switch Set, Miniature 1/4" Rece...

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    from $57.80
  • 120T/4473 Series 3/4" Switch 3/8" Magnet Recessed Switch Sets
    from $36.60

    Recessed 3/4" Switch 3/8" Magnet Switch Sets - 120T/4473 Series - 10 Pack

    120T-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 3/4" Switch 3/8" Magnet Switc...

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    from $36.60
  • Reed Switch Set, Closed Loop, 3/4"
    from Call for Pricing

    Recessed 3/4” and 1" Steel Door Switch Set - 180-12/184-12/8080-T Series - 10 Pack

    180-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 3/4” and 1" Steel Door Switch...

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    from Call for Pricing
  • Recessed 1/2" Switch Set - 150 Series - 10 Pack
    from Call for Pricing

    Recessed 1/2" Switch Set - 150 Series - 10 Pack

    160-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 1/2" Switch Set - 150 Series ...

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    from Call for Pricing
  • Push Button/Plunger Switch - PB-100/PBF-100 Series - 10 Pack
    from $55.20

    Push Button/Plunger Switch - PB-100/PBF-100 Series - 10 Pack

    PBF-100-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Push Button/Plunger Switch - 10 Pack T...

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    from $55.20
  • Roller Ball Actuated Plunger Switch, Closed Loop, Flanged
    from $61.40

    Roller Ball Plunger Contact - RB Series - 10 Pack

    RB-01-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Roller Ball Plunger Contact - 10 Pack ...

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    from $61.40
  • Roller Ball Actuated Plunger Switch, Closed Loop, Flanged, Short, w/ Leads
    from $58.40

    Roller Ball Actuated Plunger Switch, Closed Loop, Flanged, Short, w/ Leads - 10 Pack

    NPNB-DS-01-W
    GRI

    Description Roller Ball Actuated Plunger Switch, Closed Loop, Flanged, Short, w/ Leads - 10 Pack (White) The new Short Roller Ball Switch is a un...

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    from $58.40
  • Reed Switch Set, Open Loop, Miniature 1/4" Recessed Press Fit w/ Cable Leads
    from $57.80

    Reed Switch Set, Open Loop, Miniature 1/4" Recessed Press Fit w/ Cable Leads - 10 Pack

    NPNB-60R-12-W
    GRI

    Description Open Loop, Miniature 1/4" Recessed Press Fit Reed Switch Set w/ Cable Leads - 10 Pack (White) The miniature 1/4" recessed reed switch...

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    from $57.80
  • Recessed 3/4” & 1” Stubby Steel Door Switch Set - 180RS/8080RS-T Series - 10 Pack
    from $56.60

    Recessed 3/4” & 1” Stubby Steel Door Switch Set - 180RS/8080RS-T Series - 10 Pack

    8080RS-T
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 3/4” & 1” Stubby Steel Do...

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    from $56.60
  • Pool Alarm Recessed Door Alert
    $94.48

    Pool Alarm Door Alert - 189N Series - Open Loop

    189N-1
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Pool Alarm Door Alert - ETL Listed - 1...

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    $94.48
  • Pool Alarm Recessed Door Alert
    $94.48

    Pool Alarm Door Alert - 289N Series - Closed Loop

    289N-1
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Pool Alarm Door Alert - 289 Series The...

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    $94.48
  • Magnasphere Recessed 1/2” Switch Set - MS150-12/MS150-T Series - 10 Pack
    Call for Pricing

    Magnasphere Recessed 1/2” Switch Set - MS150-12/MS150-T Series - 10 Pack

    MS150-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Magnasphere Recessed 1/2” Switch Set -...

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    Call for Pricing
  • Magnasphere Aluminum Industrial Switch Set - MS4400 Series
    Sold out
    $65.82

    Magnasphere Aluminum Industrial Switch Set - MS4400 Series

    MS4400
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Magnasphere Aluminum Industrial Switch...

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    $65.82
    Sold out
  • Commercial Overhead Door Switch
    from Call for Pricing

    Commercial Overhead Door Surface Mount Switch Set - 4110/4482 Series

    4482A
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Commercial Overhead Door Surface Mount...

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    from Call for Pricing
  • Water Sensor With Relay Contact - 2500/2600 Series
    from $21.80

    Water Sensor With Relay Contact - 2500/2600 Series

    2600
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Water Sensor With Relay Contact Undete...

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    from $21.80
  • Super Miniature 1/4” Recessed Switch Set - 50RS-12 Series - 10 Pack
    from $41.20

    Super Miniature 1/4” Recessed Switch Set - 50RS-12 Series - 10 Pack

    50RS-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Super Miniature 1/4” Recessed Switch...

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    from $41.20
  • Miniature Surface Mount Switch Sets - 1100 Series - 10 Pack
    from $53.00

    Miniature Surface Mount Switch Sets - 1100 Series - 10 Pack

    1100A-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature Surface Mount Switch Sets - ...

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    from $53.00
  • N Series Switch Set Magnetic Contacts, Rare Earth Magnets w/ Press Fit Contacts
    from $48.00

    Rare Earth Mighty Mag Series Switch Sets - N20RS Series - 10 Pack

    N20RS-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Rare Earth Mighty Mag Series Switch Se...

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    from $48.00
  • Press Fit Reed Switch, 3/8" Recessed w/ Cable Leads and Nickel Plated Magnets
    from $37.80

    Rare Earth Mighty Mag Series Switch Sets - N2020 Series - 10 Pack

    N2020-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Rare Earth Mighty Mag Series Switch Se...

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    from $37.80
  • Press Fit Reed Switch, 3/4" Recessed w/ Cable Leads and Nickel Plated Magnets
    from $41.80

    Rare Earth Mighty Mag Series Switch Sets - N120T Series - 10 Pack

    N120T-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Rare Earth Mighty Mag Series Switch Se...

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    from $41.80
  • Miniature 1/4” Recessed Switch Set - 50R Series - 10 Pack
    from $32.80

    Miniature 1/4” Recessed Switch Set - 50R Series - 10 Pack

    50RF-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature 1/4” Recessed Switch Set -...

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    from $32.80
  • Pool Alarm Recessed Door Alert
    from Call for Pricing

    Pool Alarm Door Alert - ETL Listed - 189 Series - Open Loop

    189-1C
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Pool Alarm Door Alert - ETL Listed - 1...

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    from Call for Pricing
  • Miniature Overhead Door Switch Set - 4532/4532L Series
    Call for Pricing

    Miniature Overhead Door Switch Set - 4532/4532L Series

    4532
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Miniature Overhead Door Switch Set - 4...

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    Call for Pricing
  • Box Tamper Switch With 12" Wire Leads
    from $73.40

    Box Tamper Switch - TS-01 Series - 10 Pack

    TS-01S
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Box Tamper Switch With 12" Wire Leads ...

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    from $73.40
  • Industrial Surface Mount Switch Set - 4400 Series
    Call for Pricing

    Industrial Surface Mount Switch Set - 4400 Series

    4400-A
    GRI

    Description Industrial Surface Mount Switch Set - 4400 Series This series is a heavy duty surface mounted industrial grade contact. A weather resis...

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    Call for Pricing
  • Reed Switch Set, Micro Surface Mount w/ Self-Stick Adhesive & Center Leads
    from $42.20

    Micro Surface Mount Switch Set - 500 Series - 10 Pack

    502-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Micro Surface Mount Switch Set - 10 Pa...

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    from $42.20
  • Capped Miniature Surface Mount Switch Set - 700 Series - 10 Pack
    from $63.60

    Capped Miniature Surface Mount Switch Set - 700 Series - 10 Pack

    700CL-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Capped Miniature Surface Mount Switch ...

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    from $63.60
  • Recessed 3/8” Flanged Switch Set - 20F/20 OF Series - 10 Pack
    from Call for Pricing

    Recessed 3/8” Flanged Switch Set - 20F/20 OF Series - 10 Pack

    20F-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 3/8” Flanged Switch Set - 10 ...

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    from Call for Pricing
  • Recessed 3/8" Switch Set Magnetic Contact, 1" Plus Standard Gap, 12" leads, White
    from $34.20

    Rare Earth Mighty Mag Series Switch Sets - N5065 Series - 10 Pack

    N5065-72
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Rare Earth Mighty Mag Series Switch Se...

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    from $34.20
  • Recessed 1/2” Short Switch Sets - 150RS Series - 10 Pack
    from $50.80

    Recessed 1/2” Short Switch Sets - 150RS Series - 10 Pack

    150RS-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 1/2” Short Switch Sets - 150R...

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    from $50.80
  • Press Fit Reed Switch 3/8"
    from $38.00

    Recessed 3/8” Ribbed Switch Set - 2120 Series - 10 Pack

    2120-12
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Recessed 3/8” Ribbed Switch Set The 21...

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    from $38.00
  • Mighty Mag Rare Earth Magnets (Round) - 10 Pack
    from $8.80

    Mighty Mag Rare Earth Magnets (Round) - 10 Pack

    MM-375
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Rare Earth Magnets (Mighty Mag) - 10 P...

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    from $8.80
  • Industrial Overhead Aluminum Door Switch Set
    from $31.66

    Industrial Overhead Aluminum Door Switch Set - 200/250 Series

    210-36
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Industrial Overhead Aluminum Door Swit...

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    from $31.66
  • Door Monitor
    from $102.76

    Door Monitor

    290-1
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Door Monitor The Door Monitors have be...

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    from $102.76
  • Door Alert Annunciator
    $85.36

    Door Alert Annunciator

    DA-1
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Door Alert Annunciator The Door Alert ...

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    $85.36
  • Child Resistant Pool Alarm - ETL Listed
    $95.84

    Child Resistant Pool Alarm - ETL Listed

    289CP-1
    GRI

    These products are all Made to Order Which means they are non-cancelable and non-refundable Description Child Resistant Pool Alarm - ETL Liste...

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    $95.84