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Brand New DSC FSA-410AST 4-wire Photoelectric Smoke Detector Sounder & Heat Det • $38.99
Brand New Dsc Fsa-410ast 4-wire Photoelectric Smoke Detector Sounder & Heat Det

38.99$

System Sensor 4-Wire Plug-in Photoelectric Smoke Detector 12/24V W/ Base 4 W-B • $39.95
System Sensor 4-wire Plug-in Photoelectric Smoke Detector 12/24v W/ Base 4 W-b

39.95$

Auction
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $75
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

75$ 0 bids | 2d

System Sensor 4WT-B Smoke Detector 4-Wire - 20JZ01 • $44
System Sensor 4wt-b Smoke Detector 4-wire - 20jz01

44$

25%
System Sensor D4120 4-wire Photoelectric Low-flow Duct Smoke Detector • $45
System Sensor D4120 4-wire Photoelectric Low-flow Duct Smoke Detector

45$ 60$

11%
System Sensor D4120 4 Wire Photoelectric New Duct Smoke Detector • $59.99
System Sensor D4120 4 Wire Photoelectric New Duct Smoke Detector

59.99$ 67.05$

*Telaire TSD-SJ-C01 Carrier HK50ZT001 Photoelectric Duct Smoke Sensor 4Wire RJ45 • $99.99
*telaire Tsd-sj-c01 Carrier Hk50zt001 Photoelectric Duct Smoke Sensor 4wire Rj45

99.99$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $70
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

70$

System Sensor 4WT-B - 4-wire Photoelectric I3 Smoke Detector • $60.51
System Sensor 4wt-b - 4-wire, Photoelectric I3 Smoke Detector

60.51$

Totaline Innovair Flex 4 Wire Duct Smoke Detector (P270-3000PL) • $80
Totaline Innovair Flex 4 Wire Duct Smoke Detector (p270-3000pl)

80$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector W2c • $77
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector W2c

77$

System Sensor 4W-B Smoke Detector 4-Wire - Same Day Shipping (SEALED) • $48.10
System Sensor 4w-b Smoke Detector 4-wire - Same Day Shipping (sealed)

48.10$

Auction
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $50
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

50$ 1 bids | 6d

SIMPLEX 4098-9756 - Air Duct 4 Wire Sensor Housing Smoke Detector Fire Alarm NEW • $89.99
Simplex 4098-9756 - Air Duct 4 Wire Sensor Housing Smoke Detector Fire Alarm New

89.99$

10%
Telaire TSD-SJ-C01 Carrier HK50ZT001 Photoelectric Duct Smoke Sensor 4Wire RJ45 • $53.09
Telaire Tsd-sj-c01 Carrier Hk50zt001 Photoelectric Duct Smoke Sensor 4wire Rj45

53.09$ 58.99$

System Sensor D4120W - Watertight 4-Wire Duct Smoke Detector • $225.56
System Sensor D4120w - Watertight 4-wire Duct Smoke Detector

225.56$

Photoelectric 4-Wire Smoke Detector 12 Vdc SFIRE SF-119-412 • $36.96
Photoelectric 4-wire Smoke Detector, 12 Vdc Sfire Sf-119-412

36.96$

17%
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $50
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

50$ 60$

DS Bosch DS284 4 Wire Photoelectric Smoke Detector NEW • $44
Ds Bosch Ds284 4 Wire Photoelectric Smoke Detector New

44$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $55
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

55$

25%
System Sensor D4120 Photoelectric 4-Wire Duct Smoke Detector • $44.99
System Sensor D4120 Photoelectric 4-wire Duct Smoke Detector

44.99$ 59.99$

2%
Simplex 4098-9756 Air Duct Sensor Housing 4-Wire. Air Duct Smoke Detector. • $80
Simplex 4098-9756 Air Duct Sensor Housing 4-wire. Air Duct Smoke Detector.

80$ 81.47$

System Sensor 4-WB 4 Wire Smoke Detector • $70
System Sensor 4-wb 4 Wire Smoke Detector

70$

Kidde 21007588 120V AC Wire-in Hush Smoke Alarm With Battery Backup - 4 Pack • $61.37
Kidde 21007588 120v Ac Wire-in Hush Smoke Alarm With Battery Backup - 4 Pack

61.37$

System Sensor D4120W - Universal Watertight 4 Wire Photoelectric Smoke Detector • $199.95
System Sensor D4120w - Universal Watertight 4 Wire Photoelectric Smoke Detector

199.95$

2%
NEW System Sensor COSMO-2W 2 Wire I4 Carbon Monoxide & Smoke Detector • $82.99
New System Sensor Cosmo-2w 2 Wire I4 Carbon Monoxide & Smoke Detector

82.99$ 84.99$

Smoke Detector Base 6 4 Wire W/Relay 24 Volt. System Sensor Model #B112LP • $64.95
Smoke Detector Base, 6", 4 Wire W/relay, 24 Volt. System Sensor Model #b112lp

64.95$

10%
*Telaire TSD-SJ-C01 Carrier HK50ZT001 Photoelectric Duct Smoke Sensor 4Wire RJ45 • $71.99
*telaire Tsd-sj-c01 Carrier Hk50zt001 Photoelectric Duct Smoke Sensor 4wire Rj45

71.99$ 79.99$

System Sensor 2412B 400 Series 4-Wire Direct Wire Smoke Detector Photoelectric • $79.99
System Sensor 2412b 400 Series 4-wire Direct Wire Smoke Detector Photoelectric

79.99$

System Sensor Innovair Flex 4-wire Duct Smoke Detector D4120 Nib • $149.99
System Sensor Innovair Flex 4-wire Duct Smoke Detector D4120 Nib

149.99$

6%
Smoke Detector Base 6 4 Wire W/Relay 24 Volt. System Sensor Model B112LP • $58.27
Smoke Detector Base 6" 4 Wire W/relay, 24 Volt. System Sensor Model B112lp

58.27$ 61.99$

System Sensor D4120W Universal Watertight 4 Wire Photoelectric Smoke Detector • $199.99
System Sensor D4120w Universal Watertight 4 Wire Photoelectric Smoke Detector

199.99$

System Sensor COSMO-4W I4 Series 4-Wire CO And Smoke Combination Detector • $80.99
System Sensor Cosmo-4w I4 Series, 4-wire Co And Smoke Combination Detector

80.99$

System Sensor 4W-B Smoke Detector 4 Wire Open Box/New White Easy Maintenance • $35
System Sensor 4w-b Smoke Detector, 4 Wire, Open Box/new, White, Easy Maintenance

35$

GE ESL Interlogix 541NB Photoelectric 4 Wire Smoke Detector 12/24VDC New Sealed • $59
Ge Esl Interlogix 541nb Photoelectric 4 Wire Smoke Detector 12/24vdc New Sealed

59$

System Sensor 4WT-B I3 Series 4-wire Photoelectric Smoke Detector • $64.99
System Sensor 4wt-b I3 Series 4-wire Photoelectric Smoke Detector

64.99$

System Sensor 4W-B Photoelectric I3 Series Smoke Detector - 4-Wire • $45
System Sensor 4w-b Photoelectric I3 Series Smoke Detector - 4-wire

45$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $80
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

80$

5%
Telaire Carrier HK50ZT001 Photoelectric Duct Smoke Sensor SENSOR MODULE - 4 Wire • $123.49
Telaire Carrier Hk50zt001 Photoelectric Duct Smoke Sensor Sensor Module - 4 Wire

123.49$ 129.99$

INNOVAIR A5190 DUCT SMOKE DECTECTOR 4 WIRE PHOTOELECTRIC Detector BOARD ONLY NIB • $30
Innovair A5190 Duct Smoke Dectector 4 Wire Photoelectric Detector Board Only Nib

30$

SYSTEM SENSOR Innovair D4120 4 Wire Photoelectric Duct Smoke Detector • $64.99
System Sensor Innovair D4120 4 Wire Photoelectric Duct Smoke Detector

64.99$

15%
System Sensor D4S 4-Wire Duct Smoke Detector W/ D4P120 Power Board • $106.25
System Sensor D4s 4-wire Duct Smoke Detector W/ D4p120 Power Board

106.25$ 125$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $99
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

99$

System Sensor 4W-B Photoelectric I3 Series Smoke Detector - 4-Wire • $50
System Sensor 4w-b Photoelectric I3 Series Smoke Detector - 4-wire

50$

System Sensor COSMO-4W 4 Wire Combination Carbon Monoxide & Smoke Detector NEW • $107.99
System Sensor Cosmo-4w 4 Wire Combination Carbon Monoxide & Smoke Detector New

107.99$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $149
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

149$

New Lot Of 7 Alarmseg Model: 1xx674 4 Wire 12vdc Photoelectric Smoke Detector • $174.98
New Lot Of 7 Alarmseg Model: 1xx674 4 Wire 12vdc Photoelectric Smoke Detector

174.98$

System Sensor 4W-B I3 Series 4-wire Photoelectric Smoke Detector Free Ship NEW • $45
System Sensor 4w-b I3 Series 4-wire Photoelectric Smoke Detector Free Ship New

45$

7%
System Sensor I4 Cosmo-4W CO And Smoke Detector 4 Wire Expires Sept 2028 NIB • $74.99
System Sensor I4 Cosmo-4w Co And Smoke Detector 4 Wire Expires Sept 2028 Nib

74.99$ 80.98$

NEW System Sensor 4W-B I3 Series 4-wire Photoelectric Smoke Detector Free Ship • $88
New System Sensor 4w-b I3 Series 4-wire Photoelectric Smoke Detector Free Ship

88$

System Sensor 2WTA-B 2-Wire Photoelectric Thermal Sounder Smoke Detector - QTY 4 • $230
System Sensor 2wta-b 2-wire Photoelectric Thermal Sounder Smoke Detector - Qty 4

230$

Brand New System Sensor 4W-B I3 Series 4-wire Photoelectric Smoke Detector • $30
Brand New System Sensor 4w-b I3 Series 4-wire Photoelectric Smoke Detector

30$

New System Sensor 4WT-B I3 Series 4-wire Photoelectric Smoke Detector Free Ship • $68.99
New System Sensor 4wt-b I3 Series 4-wire Photoelectric Smoke Detector Free Ship

68.99$

NEW System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $116
New System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

116$

Smoke Detenctor 4 Wires • $35
Smoke Detenctor 4 Wires

35$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector (NEW) • $100
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector (new)

100$

GE ESL Interlogix 541NB Photoelectric 4 Wire Smoke Detector 12/24VDC - New • $55
Ge Esl Interlogix 541nb Photoelectric 4 Wire Smoke Detector 12/24vdc - New

55$

System Sensor 4W-B 4-wire Plug-In Photoelectric Sensor With Base • $49.99
System Sensor 4w-b 4-wire Plug-in Photoelectric Sensor With Base

49.99$

System Sensor D4S 4-Wire Duct Smoke Detectors. NIB!! • $115
System Sensor D4s 4-wire Duct Smoke Detectors. Nib!!

115$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $100
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

100$

System Sensor 4WT-B I3 Series 4-Wire Photoelectric Smoke And Thermal Detector • $60
System Sensor 4wt-b I3 Series 4-wire Photoelectric Smoke And Thermal Detector

60$

SYSTEM SENSOR 4WT-B Photoelectric 4 WIRE PLUG IN /FREE SHIPPING • $48.50
System Sensor 4wt-b Photoelectric 4 Wire Plug In /free Shipping

48.50$

SYSTEM SENSOR COSMO-4W - 4-Wire CO/Smoke Detector • $117.50
System Sensor Cosmo-4w - 4-wire Co/smoke Detector

117.50$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $100
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

100$

Kiddie Self Testing 4 Pack /hardwire And Battery / Smoke And Carbon NEW • $69.95
Kiddie Self Testing 4 Pack /hardwire And Battery / Smoke And Carbon New

69.95$

*Telaire TSD-SJ-C01 Carrier HK50ZT001 Photoelectric Duct Smoke Sensor 4Wire RJ45 • $249.95
*telaire Tsd-sj-c01 Carrier Hk50zt001 Photoelectric Duct Smoke Sensor 4wire Rj45

249.95$

SYSTEM SENSOR INNOVAIR FLEX 4-WIRE DUCT SMOKE DETECTOR MODEL NO: D4120 New! • $139.99
System Sensor Innovair Flex 4-wire Duct Smoke Detector Model No: D4120 New!

139.99$

System Sensor DFSUPCO Innovair Flex 4-Wire Low Flow Duct Smoke Detector - NEW • $99.95
System Sensor Dfsupco Innovair Flex 4-wire Low Flow Duct Smoke Detector - New

99.95$

TWO(2) System Sensor 4W-B Photoelectric I3 Series 4-Wire Smoke Detectors • $100
Two(2) System Sensor 4w-b Photoelectric I3 Series 4-wire Smoke Detectors

100$

System Sensor D4120W 4-Wire Photoelectric Duct Smoke Detector -Parts • $105
System Sensor D4120w 4-wire Photoelectric Duct Smoke Detector -parts

105$

Air Products Controls SL-2000-P 4 Wire Conventional Duct Smoke Detector • $99
Air Products Controls Sl-2000-p 4 Wire Conventional Duct Smoke Detector

99$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $115
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

115$

SYSTEM SENSOR 4WTR-B - 4 Wire Photo Detector With Base Included • $67.85
System Sensor 4wtr-b - 4 Wire Photo Detector With Base Included

67.85$

NEW System Sensor Carbon Monoxide & Smoke Detection COSMOD2W 2 Wire I4 • $64.99
New System Sensor Carbon Monoxide & Smoke Detection Cosmod2w 2 Wire I4

64.99$

INNOVAIR A5190 DUCT SMOKE DECTECTOR 4 WIRE PHOTOELECTRIC Detector BOARD ONLY NIB • $55
Innovair A5190 Duct Smoke Dectector 4 Wire Photoelectric Detector Board Only Nib

55$

System Sensor 4WTA-B I3 Series 4-Wire Photoelectric Smoke Thermal With Sounder . • $79.99
System Sensor 4wta-b I3 Series 4-wire Photoelectric Smoke Thermal With Sounder .

79.99$

System Sensor D4120W - Watertight 4-Wire Duct Smoke Detector • $224.99
System Sensor D4120w - Watertight 4-wire Duct Smoke Detector

224.99$

System Sensor D4120 Photoelectric 4-Wire Duct Smoke Detector / InnovAir Flex • $106.99
System Sensor D4120 Photoelectric 4-wire Duct Smoke Detector / Innovair Flex

106.99$

System Sensor Innovair Flex 4120 4-Wire Duct Smoke Detector • $110
System Sensor Innovair Flex 4120 4-wire Duct Smoke Detector

110$

System Sensor 4WTA-B 4WTAB I3 Series 4-wire Photoelectric Smoke Detector • $71.99
System Sensor 4wta-b 4wtab I3 Series 4-wire Photoelectric Smoke Detector

71.99$

System Sensor 4W-B I3 Series 4-wire Photoelectric Smoke Detector • $39.95
System Sensor 4w-b I3 Series 4-wire Photoelectric Smoke Detector

39.95$

13%
System Sensor COSMOD4W *MANUFACTURED 2022* (NEW) • $50
System Sensor Cosmod4w *manufactured 2022* (new)

50$ 57.54$

System Sensor D4120 - Universal 4 Wire Photoelectric Smoke Detector NEW! • $129.99
System Sensor D4120 - Universal 4 Wire Photoelectric Smoke Detector New!

129.99$

NEW System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $112
New System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

112$

Innovair D4p120 Duct Smoke Dectector 4 Wire Photoelectric Power Board Only • $62
Innovair D4p120 Duct Smoke Dectector 4 Wire Photoelectric Power Board Only

62$

System Sensor A5064 Replacement 4 Wire Power Board DH100 Series Duct Smoke NEW • $99.99
System Sensor A5064 Replacement 4 Wire Power Board Dh100 Series Duct Smoke New

99.99$

Brand New System Sensor D4120 4-Wire Duct Smoke Detector With Head Fast Shipping • $122.50
Brand New System Sensor D4120 4-wire Duct Smoke Detector With Head Fast Shipping

122.50$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $100
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

100$

System Sensor 4W-B Smoke Alarm12/24 Vdc 4-WireW/Base • $61.99
System Sensor 4w-b Smoke Alarm,12/24 Vdc, 4-wire,w/base

61.99$

System Sensor 2112/24TS Photoelectronic And Thermal Detector - NEW • $35
System Sensor 2112/24ts Photoelectronic And Thermal Detector - New

35$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $150
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

150$

22%
System Sensor COSMOD4W 2 Wire Interface Module • $45
System Sensor Cosmod4w 2 Wire Interface Module

45$ 57.54$

System Sensor CO-REPL Replacement CO Cell For COSMO-2W And COSMO-4W Detectors • $69.99
System Sensor Co-repl Replacement Co Cell For Cosmo-2w And Cosmo-4w Detectors

69.99$

System Sensor 4 Wire Duct Smoke Detector D4120 Innovair Flex • $125
System Sensor 4 Wire Duct Smoke Detector D4120 Innovair Flex

125$

Air Products & Controls SM-501-N CONVENTIONAL 4 WIRE Duct Smoke Detector • $74.95
Air Products & Controls Sm-501-n Conventional 4 Wire Duct Smoke Detector

74.95$

System Sensor D4120 Photoelectric 4-Wire Duct Smoke Detector / InnovAir Flex • $69.99
System Sensor D4120 Photoelectric 4-wire Duct Smoke Detector / Innovair Flex

69.99$

System Sensor D4S 4-Wire Duct Smoke Detector W/ D4P120 Power Board • $105
System Sensor D4s 4-wire Duct Smoke Detector W/ D4p120 Power Board

105$

System Sensor PD4120 Photoelectric 4-Wire Duct Smoke Detector / InnovAir Flex • $85
System Sensor Pd4120 Photoelectric 4-wire Duct Smoke Detector / Innovair Flex

85$

System Sensor D4120 4-wire Duct Smoke Detector • $149.99
System Sensor D4120 4-wire Duct Smoke Detector

149.99$

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector • $87
System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

87$

    • Brand
    • System Sensor166
    • Photoelectric6
    • Bosch4
    • GE3
    • Kidde1
    • Siemens1