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    System Sensor

    System Sensor's mission is to produce top-notch devices that save lives. Our versatile product offerings quickly detect the presence of dangers like smoke, fire, or carbon monoxide and then alert people to evacuate. We've been world leaders in the industry since 1984, and we're proud to serve our customers both offline and online.

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    Picture of 3 WATERFLOWDETECTORNEMA4

    3 WATERFLOWDETECTORNEMA4

    SYSTEM SENSOR:WFD30N
    SKU: SYSTEM SENSOR:WFD30N
    $181.00
    Picture of 3(2) SPDT X-PRF WATERFLOWDET

    3(2) SPDT X-PRF WATERFLOWDET

    SYSTEM SENSOR:WFD30-2EXP
    SKU: SYSTEM SENSOR:WFD30-2EXP
    $2,132.99
    Picture of 4 WIRE 135F DECT 12/24VDC W/RELAY

    4 WIRE 135F DECT 12/24VDC W/RELAY

    SYSTEM SENSOR:4WTR-B
    SKU: SYSTEM SENSOR:4WTR-B
    $94.02
    Picture of 4 WIRE HORN/STROBE STD

    4 WIRE HORN/STROBE STD

    SYSTEM SENSOR:P4WK
    SKU: SYSTEM SENSOR:P4WK
    $137.85
    Picture of 4 WIRE SENSOR

    4 WIRE SENSOR

    SYSTEM SENSOR:D4S
    SKU: SYSTEM SENSOR:D4S
    $160.30
    Picture of 4(2)SPDT WATERFLOW DETECTOR

    4(2)SPDT WATERFLOW DETECTOR

    SYSTEM SENSOR:WFD40N
    SKU: SYSTEM SENSOR:WFD40N
    $181.00
    Picture of 4(2)SPDT X-PRF WATERFLOWDET

    4(2)SPDT X-PRF WATERFLOWDET

    SYSTEM SENSOR:WFD40EXP
    SKU: SYSTEM SENSOR:WFD40EXP
    $2,205.35
    Picture of 4WIRE DETEC.12/24VDC ISOLATED

    4WIRE DETEC.12/24VDC ISOLATED

    SYSTEM SENSOR:4WITAR-B
    SKU: SYSTEM SENSOR:4WITAR-B
    $109.93
    Picture of 4WIRE DETEC.12/24VDC W/SOUNDER

    4WIRE DETEC.12/24VDC W/SOUNDER

    SYSTEM SENSOR:4WTAR-B
    SKU: SYSTEM SENSOR:4WTAR-B
    $99.76
    Picture of 4WIRE RED CEILING HORN/STROBE

    4WIRE RED CEILING HORN/STROBE

    SYSTEM SENSOR:PC4RL
    SKU: SYSTEM SENSOR:PC4RL
    $100.20
    Picture of 4WIRE RED WALL MNT HORN/STROBE

    4WIRE RED WALL MNT HORN/STROBE

    SYSTEM SENSOR:P4RL
    SKU: SYSTEM SENSOR:P4RL
    $102.64
    Picture of 4WIRE WHITE WALL MNT HORN/STRB

    4WIRE WHITE WALL MNT HORN/STRB

    SYSTEM SENSOR:P4WL
    SKU: SYSTEM SENSOR:P4WL
    $98.49
    Picture of 4WIRECEILINGHORN/STROBESTANDCD

    4WIRECEILINGHORN/STROBESTANDCD

    SYSTEM SENSOR:PC4W
    SKU: SYSTEM SENSOR:PC4W
    $75.58
    Picture of 4WIREHORN/STROBEOUTDOORSTANDCD

    4WIREHORN/STROBEOUTDOORSTANDCD

    SYSTEM SENSOR:P4RK
    SKU: SYSTEM SENSOR:P4RK
    $137.40
    Picture of 4WIREPHOTO 135F FIXED 12/24VDC

    4WIREPHOTO 135F FIXED 12/24VDC

    SYSTEM SENSOR:4WT-B
    SKU: SYSTEM SENSOR:4WT-B
    $74.70
    Picture of 4WIREPHOTO135F12/24VDCW/SOUNDR

    4WIREPHOTO135F12/24VDCW/SOUNDR

    SYSTEM SENSOR:4WTA-B
    SKU: SYSTEM SENSOR:4WTA-B
    $91.55
    Picture of 4WIREPHOTODETECTOR 12/24VDC

    4WIREPHOTODETECTOR 12/24VDC

    SYSTEM SENSOR:4W-B
    SKU: SYSTEM SENSOR:4W-B
    $69.25
    Picture of 5(2)SPDT WATERFLOW DETECTOR

    5(2)SPDT WATERFLOW DETECTOR

    SYSTEM SENSOR:WFD50N
    SKU: SYSTEM SENSOR:WFD50N
    $185.91
    Picture of 5(2)SPDT X-PRF WATERFLOWDET

    5(2)SPDT X-PRF WATERFLOWDET

    SYSTEM SENSOR:WFD50EXP
    SKU: SYSTEM SENSOR:WFD50EXP
    $2,132.99
    Picture of 6(2)SPDT WATERFLOW DETECTOR

    6(2)SPDT WATERFLOW DETECTOR

    SYSTEM SENSOR:WFD60N
    SKU: SYSTEM SENSOR:WFD60N
    $181.00
    Picture of 6(2)SPDT X-PRF WATERFLOWDET

    6(2)SPDT X-PRF WATERFLOWDET

    SYSTEM SENSOR:WFD60EXP
    SKU: SYSTEM SENSOR:WFD60EXP
    $2,205.35
    Picture of 6120V ALARM BELL

    6120V ALARM BELL

    SYSTEM SENSOR:SSV120-6
    SKU: SYSTEM SENSOR:SSV120-6
    $62.19
    Picture of 6FLGD 2WIRE DETECTOR BASE

    6FLGD 2WIRE DETECTOR BASE

    SYSTEM SENSOR:B210LP
    SKU: SYSTEM SENSOR:B210LP
    $21.93
    Picture of 8(2)SPDT WATERFLOW DETECTOR

    8(2)SPDT WATERFLOW DETECTOR

    SYSTEM SENSOR:WFD80N
    SKU: SYSTEM SENSOR:WFD80N
    $207.21
    Picture of 8(2)SPDT X-PRF WATERFLOWDET

    8(2)SPDT X-PRF WATERFLOWDET

    SYSTEM SENSOR:WFD80EXP
    SKU: SYSTEM SENSOR:WFD80EXP
    $2,302.87
    Picture of 8ALARM BELL 120VAC

    8ALARM BELL 120VAC

    SYSTEM SENSOR:SSV120-8
    SKU: SYSTEM SENSOR:SSV120-8
    $76.31
    Picture of 8POLARIZED ALARM BELL 24VDC

    8POLARIZED ALARM BELL 24VDC

    SYSTEM SENSOR:SSM24-8
    SKU: SYSTEM SENSOR:SSM24-8
    $76.27
    Picture of ACCESSORY KIT FOR OSY2

    ACCESSORY KIT FOR OSY2

    SYSTEM SENSOR:OSYRK
    SKU: SYSTEM SENSOR:OSYRK
    $20.02
    Picture of ADD-ON-STOBE

    ADD-ON-STOBE

    SYSTEM SENSOR:AOS
    SKU: SYSTEM SENSOR:AOS
    $64.32
    Picture of AMBER LENS

    AMBER LENS

    SYSTEM SENSOR:LENS-A2
    SKU: SYSTEM SENSOR:LENS-A2
    $13.57
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