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Alarm & Security Devices

Browse All Electronics selection of alarm related products, including extremely loud car alarm sirens, photo-electric sender and receiver pairs, magnet proximity switches, inexpensive alarm stickers and wireless motion sensor alerts. If you are looking for quieter alarm devices, see our “Buzzer and Beeper” section.

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<span style="color:#FF0000"><strong>REDUCED</strong></span><br>THROUGH-BEAM PHOTO-ELECTRIC SENSOR PAIR
Clearance Limited Quantity
REDUCED
THROUGH-BEAM PHOTO-ELECTRIC SENSOR PAIR
CAT# OSU-1130
Was  $9.95  NOW $4.95 pair. SICK Optics WS15-D1130 / WE15-A1130. Photo-electric sender and receiver pair...
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$4.95 pair
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HC-SR505 MINI INFRARED MOTION SENSOR
Limited Quantity
HC-SR505 MINI INFRARED MOTION SENSOR
CAT# PIR-13
Mini-passive infrared motion detection module (PIR). Senses changes in infrared heat patterns. Frequently used to sense human...
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$3.50 each
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12 VDC ALARM SIREN
Limited Quantity
12 VDC ALARM SIREN
CAT# ES-25
Extremely loud 12 VDC car alarm siren. Distinctive siren pattern cycles through six different sounds every thirty seconds....
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$3.00 each
10+ $2.50 each
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EXTRA-LOUD MINI PIEZO SIREN
EXTRA-LOUD MINI PIEZO SIREN
CAT# ES-10
Small, painfully-loud two-tone piezo siren for auto or home security devices. Operates 6-12 vdc, 110 ma. 108dB output (30cm)....
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$6.50 each
10+ $6.25 each
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MAGNETIC PROXIMITY SWITCH
MAGNETIC PROXIMITY SWITCH
CAT# MS-44
Two-piece, alarm-type magnetic reed switch. For closed-loop alarm systems - Circuit is closed when magnet and switch are in...
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$2.25 each
10+ $2.00 each
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SPDT N.O./N.C. MAGNET SWITCH
SPDT N.O./N.C. MAGNET SWITCH
CAT# MS-45
Can be used on normally open or normally closed loop systems. Switch measures 2.16" long x 0.46" deep x 0.53" high. Includes...
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$6.50 each
10+ $6.25 each
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<span style="color:#FF0000"><strong>CLEARANCE</strong></span><br>REFLECTIVE EMERGENCY STICKER
Clearance Limited Quantity Large Quantity
CLEARANCE
REFLECTIVE EMERGENCY STICKER
CAT# ES-22
18" long x 2.5" wide semi-circle. Black lettering on gray 3M Scotchlite™ reflective sheeting. Peel-off adhesive...
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10 for $1.00
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PRESS FIT MAGNET SWITCH
PRESS FIT MAGNET SWITCH
CAT# MS-11
Press-fit into 3/8" hole. Ideal for windows and doors. For normally closed systems. 0.75" operating gap. U.L. listed....
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$4.35 each
10+ $4.10 each
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SURVEILLANCE SIGN, 9" X 11"
Limited Quantity
SURVEILLANCE SIGN, 9" X 11"
CAT# WS-1109
Weather-resistant plastic sign. 9" x 11" high with English and Spanish surveillance warnings. Includes double-sided sticky...
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$5.00 each
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INFRARED MOTION DETECTOR MODULE
Limited Quantity
INFRARED MOTION DETECTOR MODULE
CAT# PIR-12
Mini-passive infrared motion detection module (PIR). Senses changes in infrared heat patterns. Frequently used to sense...
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$3.75 each
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HOME SECURITY STICKER
HOME SECURITY STICKER
CAT# HSS
High-visibility reflective mylar stickers that can be placed on your home windows to make thieves think you have an alarm...
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5 for $1.00
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STANDARD MAGNETIC PROXIMITY SWITCH
STANDARD MAGNETIC PROXIMITY SWITCH
CAT# MS-14
For closed loop alarm systems. Switch is closed when magnet is near. Cover hides screw terminals. Off-white switch and...
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$3.15 each
10+ $2.85 each
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VEHICLE SECURITY STICKER
VEHICLE SECURITY STICKER
CAT# VSS
High-visibility reflective mylar stickers that can be placed on your car window to make thieves think you have an alarm...
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5 for $1.00
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