Simplex, now part of Johnson Controls, is one of the most widely installed fire alarm brands in North America. Simplex systems are found in hospitals, universities, airports, high rises and industrial plants, and they are maintained for decades rather than replaced. That long service life is exactly why the parts are hard to find, and it is what this collection is aimed at.
With well over a thousand Simplex line items in stock, we cover:
- Simplex smoke detectors and sensors - photoelectric, heat, combination photoelectric and heat, and carbon monoxide sensors, plus replacement cartridges
- Sensor bases, including standard, sounder and relay bases
- Duct detectors, duct housings and duct covers
- Addressable modules - individual addressable modules, zone adapter modules, relay modules and NAC extenders
- Single and double action pull stations, break rods and station keys
- Horns, strobes, horn strobes and speaker strobes, wall and ceiling mount
- Device covers, cover plates and trim in red and white
Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations. If a part is not listed, send the number through our quote page.

Simplex
Simplex 49SO-APPLW-BA TrueAlert Addressable Speaker
Sale price$131.50
Regular price$157.80
In Stock
Simplex
Simplex 4100-9706 4100ES Master Controller with Color ES Touch Screen Display
Sale price$4,338.90
Regular price$5,206.68
Contact Us for Alternatives
Simplex
Simplex 4010-9521 4010ES Addressable Fire Alarm Control Unit, Two Bay, 2x40 LCD, 500 IDNet Points, Red, 220-240 VAC
Sale price$4,159.85
Regular price$4,991.82
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-6073 SM Fiber Modem Right Port
Sale price$3,481.50
Regular price$4,177.80
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Simplex
Simplex 4100-9211 4100ES Master Controller Assembly with LCD and Operator Interface, 220-240 VAC, 250 Point IDNet
Sale price$3,259.10
Regular price$3,910.92
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Simplex
Simplex 4100-9111 4100ES Master Controller Assembly with LCD and Operator Interface, 120 VAC, 250 Point IDNet
Sale price$3,188.00
Regular price$3,825.60
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Simplex
Simplex 4081-9308 Battery Cabinet with Charger, 220/230/240 VAC Multi-Tapped Input
Sale price$2,904.00
Regular price$3,484.80
In Stock
Simplex
Simplex 4100-6309 ES NET MM Fiber Media Card
Sale price$1,088.60
Regular price$1,306.32
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-7402 6464 Ledsw Controller Module
Sale price$684.85
Regular price$821.82
Contact Us for Alternatives
Simplex
Simplex 566-071 OBSOLETE h2SIMPLEX 566071 REPLACEMENT BOARDh2
Sale price$593.40
Regular price$712.08
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Simplex
Simplex 4190-6302 4120 SMR Duplex Fiber Media
Sale price$1,179.20
Regular price$1,415.04
Contact Us for Alternatives
Simplex
Simplex 4190-6301 4120 SML Duplex Fiber Media
Sale price$1,179.20
Regular price$1,415.04
Contact Us for Alternatives
Simplex
Simplex 4100-1290 24-Point Graphic I/O Module
Sale price$489.85
Regular price$587.82
In Stock
Simplex
Simplex 4099-9710 Outdoor English UL CP Idnet
Sale price$433.45
Regular price$520.14
Not in stock - available on backorder - lead time on request
Simplex
Simplex 8566-075 4100U EXP Power Supply BD
Sale price$421.40
Regular price$505.68
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-3003 8 PT AUX Relay MOD 3 AMP
Sale price$361.30
Regular price$433.56
Contact Us for Alternatives
Simplex
Simplex 4100-7404 32 Point Switch Input Module
Sale price$479.20
Regular price$575.04
Contact Us for Alternatives
Simplex
Simplex 4100-3204 4 Point 2 AMP AUX Relay Module
Sale price$301.60
Regular price$361.92
Contact Us for Alternatives
Simplex
Simplex 4903-9146 Simplex 49039146 Fire Alarm Horn Strobe 407
Sale price$158.80
Regular price$190.56
Contact Us for Alternatives
Simplex
Simplex 2975-9464 Semi-Flush Mount Box Adapter, Platinum, for 4606 Series Color Touchscreen LCD Annunciators
Sale price$156.00
Regular price$187.20
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4099-9701 Simplex INT English Callpoint
Sale price$119.50
Regular price$143.40
Contact Us for Alternatives
Simplex
Simplex 4906-9227 Addressable Horn Strobereplaces 49039451
Sale price$113.80
Regular price$136.56
Not in stock - available on backorder - lead time on request

