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$128.25
$166.00
System Sensor COSMO-2W Carbon Monoxide And Smoke Detector
BSA Security Integrators
1
22% off
$128.25
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System Sensor COSMO-2W Carbon Monoxide And Smoke Detector
BSA Security Integrators
1
$48.50
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System Sensor 2W-B 2-Wire Photoelectric i3 Smoke Detector
BSA Security Integrators
13
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$48.50
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System Sensor 2W-B 2-Wire Photoelectric i3 Smoke Detector
BSA Security Integrators
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System Sensor SS-PHOTO SS-Series Photoelectric Smoke Detector
BSA Security Integrators
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$74.40
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System Sensor SS-PHOTO SS-Series Photoelectric Smoke Detector
BSA Security Integrators
$237.60
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, Sound Alert, Duct Mount, 5 in Overall Ht Model: D4120
Grainger
1
$237.60
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, Sound Alert, Duct Mount, 5 in Overall Ht Model: D4120
Grainger
1
$161.99
SYSTEM SENSOR Duct Smoke Detector, Photoelectric, Universal, Air Velocity (FPM) 100 To 4000, 2 1/2 in Depth, D4120
Zoro.com
2
$161.99
SYSTEM SENSOR Duct Smoke Detector, Photoelectric, Universal, Air Velocity (FPM) 100 To 4000, 2 1/2 in Depth, D4120
Zoro.com
2
$358.33
System Sensor Duct Smoke Detector: 20V AC/24V AC/24V DC Volt, 100 Ma Current, Duct Mount, White Model: D4120W
Grainger
9
$358.33
System Sensor Duct Smoke Detector: 20V AC/24V AC/24V DC Volt, 100 Ma Current, Duct Mount, White Model: D4120W
Grainger
9
$19.00
Smoke Detector - 9V Battery - ULINE
Uline
$19.00
Smoke Detector - 9V Battery - ULINE
Uline
$303.82
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, 65 Ma @ 24V DC Current, Duct Mount Model: DUCTSD
Grainger
$303.82
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, 65 Ma @ 24V DC Current, Duct Mount Model: DUCTSD
Grainger
$57.19
SYSTEM SENSOR Smoke Alarm, Hardwired, Photoelectric Sensor, Audible Alert, Volume Level 85 Db At 10 Ft, 2W-B
Zoro.com
13
$57.19
SYSTEM SENSOR Smoke Alarm, Hardwired, Photoelectric Sensor, Audible Alert, Volume Level 85 Db At 10 Ft, 2W-B
Zoro.com
13
$329.37
Brand System Sensor 2551 Photoelectronic Smoke Detector Free Fast
eBay
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eBay
$74.49
SYSTEM SENSOR Smoke Alarm, 12/24V, Hardwired, 4-Wire, Photoelectric, UL268, Includes Mounting Base, 4WT-B
Zoro.com
1
$74.49
SYSTEM SENSOR Smoke Alarm, 12/24V, Hardwired, 4-Wire, Photoelectric, UL268, Includes Mounting Base, 4WT-B
Zoro.com
1
$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$55.22
System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
13
$55.22
System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
13
$44.99
System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
13
$44.99
System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
13
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
1
40% off
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
1
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
1
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
1
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
1
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
1
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
1
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
1
$47.79
System Sensor 2WT-B Photoelectric i3 Smoke Detector, 2-Wire, 135F Fixed Thermal Sensor
JMAC
13
$47.79
System Sensor 2WT-B Photoelectric i3 Smoke Detector, 2-Wire, 135F Fixed Thermal Sensor
JMAC
13
$82.45
System Sensor 4WTR-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Form C Relay
JMAC
2
$82.45
System Sensor 4WTR-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Form C Relay
JMAC
2
$262.78
$340.96
System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector 24VDC/120VAC
Voomi Supply
9
22% off
$262.78
$340.96
System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector 24VDC/120VAC
Voomi Supply
9
$44.00
$55.00
System Sensor 2W-B 2-Wire Plug-In Photoelectric i3 Smoke Detector
eBay
5
Free shipping
20% off
$44.00
$55.00
System Sensor 2W-B 2-Wire Plug-In Photoelectric i3 Smoke Detector
eBay
5
$268.84
System Sensor | DUCTSD | Smoke Detector 4-Wire Photo Duct Economy | Gas And Specialty Sensors - Smoke Detection
Kele
$268.84
System Sensor | DUCTSD | Smoke Detector 4-Wire Photo Duct Economy | Gas And Specialty Sensors - Smoke Detection
Kele
$131.30
System Sensor B114LP Smoke Detector Base 120V AC 4-Wire Low-Profile Ivory
Voomi Supply
$131.30
System Sensor B114LP Smoke Detector Base 120V AC 4-Wire Low-Profile Ivory
Voomi Supply
$171.93
$222.50
System Sensor D4120 (Replaces 70-600000-054 & 70-600000-157) Gas/Smoke Detector | Furnace Part Source
FurnacePartSource.com
1
22% off
$171.93
$222.50
System Sensor D4120 (Replaces 70-600000-054 & 70-600000-157) Gas/Smoke Detector | Furnace Part Source
FurnacePartSource.com
1
$97.19
System Sensor | 2151 | Photoelectric Pendant Smoke Detector Body Only | Gas And Specialty Sensors - Smoke Detection
Kele
1
$97.19
System Sensor | 2151 | Photoelectric Pendant Smoke Detector Body Only | Gas And Specialty Sensors - Smoke Detection
Kele
1
$238.99
$258.28
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm With Battery Backup, 6-Pack
Amazon.com
27K+
Free shipping
$238.99
$258.28
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm With Battery Backup, 6-Pack
Amazon.com
27K+
$52.00
Smoke And Carbon Monoxide Detector - 9V Battery - ULINE
Uline
$52.00
Smoke And Carbon Monoxide Detector - 9V Battery - ULINE
Uline
$136.95
$164.34
The Fire Alarm Supplier System Sensor 2251TB Smoke Thermal Detector
Shop
16% off
$136.95
$164.34
The Fire Alarm Supplier System Sensor 2251TB Smoke Thermal Detector
Shop
$45.00
$52.00
FIRE-LITE ALARMS BY HONEYWELL FIRE-LITE SD365
Amazon.com
10
Free shipping
13% off
$45.00
$52.00
FIRE-LITE ALARMS BY HONEYWELL FIRE-LITE SD365
Amazon.com
10
$67.70
System Sensor 4W-B 4-Wire Photoelectric Smoke Detector 12/24 VDC
Parts HNC
7
$67.70
System Sensor 4W-B 4-Wire Photoelectric Smoke Detector 12/24 VDC
Parts HNC
7
$161.72
System Sensor COSMO-4W - Cosmo4w 4-Wire Co/Smoke Detector
AllDataResource.com
1
$161.72
System Sensor COSMO-4W - Cosmo4w 4-Wire Co/Smoke Detector
AllDataResource.com
1
$205.70
System Sensor Photoelectric Sensor D4S
Walmart
1
Free shipping
$205.70
System Sensor Photoelectric Sensor D4S
Walmart
1
$65.00
Smoke And Carbon Monoxide Detector - Lithium Battery - ULINE
Uline
$65.00
Smoke And Carbon Monoxide Detector - Lithium Battery - ULINE
Uline
$169.73
System Sensor D4120 Photoelectric Duct Smoke Detector 24V AC/DC 120V
Parts HNC
1
$169.73
System Sensor D4120 Photoelectric Duct Smoke Detector 24V AC/DC 120V
Parts HNC
1
$345.29
SYSTEM SENSOR Universal Watertight 4 Wire Photoelectric Smoke Detector D4120W
DkHardware.com
9
$345.29
SYSTEM SENSOR Universal Watertight 4 Wire Photoelectric Smoke Detector D4120W
DkHardware.com
9
How to wire and program System Sensor 4WB series 4 wire smokes detectors on a DSC PowerSeries Neo.
12:22
YouTubeAlarm System Store
How to wire and program System Sensor 4WB series 4 wire smokes detectors on a DSC PowerSeries Neo.
Four wire type smoke detectors are probably the most common smoke used with alarm systems. They are tried and true technology and they are generally universally compatible with all wired alarm systems. While not as simple as their newer 2 wire bretheren, they are still very simple to wire and setup. Plus, they do offer some advantages over 2 ...
22.6K viewsSep 2, 2021
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Shop system sensor smoke detector

Sponsored
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$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$55.22
System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
13
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System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
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System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
13
$44.99
System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
1
40% off
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
1
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
1
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
1
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
$47.79
System Sensor 2WT-B Photoelectric i3 Smoke Detector, 2-Wire, 135F Fixed Thermal Sensor
JMAC
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$47.79
System Sensor 2WT-B Photoelectric i3 Smoke Detector, 2-Wire, 135F Fixed Thermal Sensor
JMAC
$82.45
System Sensor 4WTR-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Form C Relay
JMAC
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$82.45
System Sensor 4WTR-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Form C Relay
JMAC
$262.78
$340.96
System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector 24VDC/120VAC
Voomi Supply
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System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector 24VDC/120VAC
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System Sensor 2W-B 2-Wire Plug-In Photoelectric i3 Smoke Detector
eBay
5
Free shipping
20% off
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$55.00
System Sensor 2W-B 2-Wire Plug-In Photoelectric i3 Smoke Detector
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System Sensor | DUCTSD | Smoke Detector 4-Wire Photo Duct Economy | Gas And Specialty Sensors - Smoke Detection
Kele
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System Sensor | DUCTSD | Smoke Detector 4-Wire Photo Duct Economy | Gas And Specialty Sensors - Smoke Detection
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$131.30
System Sensor B114LP Smoke Detector Base 120V AC 4-Wire Low-Profile Ivory
Voomi Supply
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System Sensor B114LP Smoke Detector Base 120V AC 4-Wire Low-Profile Ivory
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System Sensor D4120 (Replaces 70-600000-054 & 70-600000-157) Gas/Smoke Detector | Furnace Part Source
FurnacePartSource.com
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System Sensor D4120 (Replaces 70-600000-054 & 70-600000-157) Gas/Smoke Detector | Furnace Part Source
FurnacePartSource.com
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System Sensor | 2151 | Photoelectric Pendant Smoke Detector Body Only | Gas And Specialty Sensors - Smoke Detection
Kele
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System Sensor | 2151 | Photoelectric Pendant Smoke Detector Body Only | Gas And Specialty Sensors - Smoke Detection
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First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm With Battery Backup, 6-Pack
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First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm With Battery Backup, 6-Pack
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Smoke And Carbon Monoxide Detector - 9V Battery - ULINE
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Smoke And Carbon Monoxide Detector - 9V Battery - ULINE
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The Fire Alarm Supplier System Sensor 2251TB Smoke Thermal Detector
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The Fire Alarm Supplier System Sensor 2251TB Smoke Thermal Detector
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Shop system sensor smoke detector

Sponsored
About our ads
$128.25
$166.00
System Sensor COSMO-2W Carbon Monoxide And Smoke Detector
BSA Security Integrators
1
22% off
$128.25
$166.00
System Sensor COSMO-2W Carbon Monoxide And Smoke Detector
BSA Security Integrators
1
$48.50
$86.63
System Sensor 2W-B 2-Wire Photoelectric i3 Smoke Detector
BSA Security Integrators
13
44% off
$48.50
$86.63
System Sensor 2W-B 2-Wire Photoelectric i3 Smoke Detector
BSA Security Integrators
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$74.40
$99.99
System Sensor SS-PHOTO SS-Series Photoelectric Smoke Detector
BSA Security Integrators
25% off
$74.40
$99.99
System Sensor SS-PHOTO SS-Series Photoelectric Smoke Detector
BSA Security Integrators
$237.60
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, Sound Alert, Duct Mount, 5 in Overall Ht Model: D4120
Grainger
1
$237.60
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, Sound Alert, Duct Mount, 5 in Overall Ht Model: D4120
Grainger
1
$161.99
SYSTEM SENSOR Duct Smoke Detector, Photoelectric, Universal, Air Velocity (FPM) 100 To 4000, 2 1/2 in Depth, D4120
Zoro.com
2
$161.99
SYSTEM SENSOR Duct Smoke Detector, Photoelectric, Universal, Air Velocity (FPM) 100 To 4000, 2 1/2 in Depth, D4120
Zoro.com
2
$358.33
System Sensor Duct Smoke Detector: 20V AC/24V AC/24V DC Volt, 100 Ma Current, Duct Mount, White Model: D4120W
Grainger
9
$358.33
System Sensor Duct Smoke Detector: 20V AC/24V AC/24V DC Volt, 100 Ma Current, Duct Mount, White Model: D4120W
Grainger
9
$19.00
Smoke Detector - 9V Battery - ULINE
Uline
$19.00
Smoke Detector - 9V Battery - ULINE
Uline
$303.82
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, 65 Ma @ 24V DC Current, Duct Mount Model: DUCTSD
Grainger
$303.82
System Sensor Duct Smoke Detector: 120V AC/24V AC/DC Volt, 65 Ma @ 24V DC Current, Duct Mount Model: DUCTSD
Grainger
$57.19
SYSTEM SENSOR Smoke Alarm, Hardwired, Photoelectric Sensor, Audible Alert, Volume Level 85 Db At 10 Ft, 2W-B
Zoro.com
13
$57.19
SYSTEM SENSOR Smoke Alarm, Hardwired, Photoelectric Sensor, Audible Alert, Volume Level 85 Db At 10 Ft, 2W-B
Zoro.com
13
$329.37
Brand System Sensor 2551 Photoelectronic Smoke Detector Free Fast
eBay
$329.37
Brand System Sensor 2551 Photoelectronic Smoke Detector Free Fast
eBay
$74.49
SYSTEM SENSOR Smoke Alarm, 12/24V, Hardwired, 4-Wire, Photoelectric, UL268, Includes Mounting Base, 4WT-B
Zoro.com
1
$74.49
SYSTEM SENSOR Smoke Alarm, 12/24V, Hardwired, 4-Wire, Photoelectric, UL268, Includes Mounting Base, 4WT-B
Zoro.com
1
$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$45.00
System Sensor 2W-B Photoelectric i3 Series Smoke Detector, 2-Wire,
eBay
$55.22
System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
13
$55.22
System Sensor 2W-B 2-Wire Photoelectric Smoke Detector, 2W-B | Supplyhouse.Com
SupplyHouse.com
13
$44.99
System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
13
$44.99
System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire
JMAC
13
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
1
40% off
$141.99
$240.02
System Sensor D4120 4-Wire Photoelectric Low-Flow Duct Smoke Detector 24VDC/120VAC Replaces DH100ACDCLP
Voomi Supply
1
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
1
$161.95
System Sensor D4120 Photoelectricsmoke24vac/Dc120v
1877ForParts.com
1
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
1
$254.32
System Sensor | D4120 | Smoke Detector 4-Wire Photoelectric Duct | Gas And Specialty Sensors - Smoke Detection
Kele
1
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
1
$149.87
System Sensor D4120 4-Wire Duct Smoke Detector, 4-Wire, Photoelectric, Low-Flow (24/120V), D4120 | Supplyhouse.Com
SupplyHouse.com
1

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