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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 49VO-WWFO-BA TrueAlert ES Addressable Strobe Appliance
Sale price$161.55
Regular price$193.86
In Stock
Simplex
Simplex 49AV-APPLW TrueAlert ES Addressable Horn Strobe
Sale price$69.95
Regular price$83.94
In Stock
Simplex
Simplex 4906-9139 TrueAlert Multi-Candela Horn Strobe
Sale price$82.00
Regular price$98.40
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-6301 SM-L Single-Mode Duplex Fiber Media Card, Left Port
Sale price$510.80
Regular price$612.96
In Stock
Simplex
Simplex 4100-5116 Expansion Signal (XSIG) Card
Sale price$250.60
Regular price$300.72
In Stock
Simplex
Simplex 4100-1329 DIG 100W AMP, 6NAC, 120VAC, 70V
Sale price$1,103.55
Regular price$1,324.26
In Stock
Simplex
Simplex 4100-1315 Primary Amplifier
Sale price$1,091.80
Regular price$1,310.16
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1314 Primary Amplifier
Sale price$1,227.95
Regular price$1,473.54
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1313 Flex-50, 50 W Amplifier
Sale price$1,568.60
Regular price$1,882.32
In Stock
Simplex
Simplex 4100-0635 Power Distribution Module 220/230/240 VAC
Sale price$105.00
Regular price$126.00
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4003-9803 Remote Microphone Assembly, 2-Gang Plate with Keyswitch and Ready-to-Talk LED
Sale price$584.95
Regular price$701.94
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2099-9755 Non-coded Single Action Manual Station
Sale price$46.95
Regular price$56.34
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4905-9815 SmartSync Adapter Module, Non-Addressable NAC
Sale price$103.30
Regular price$123.96
In Stock
Simplex
Simplex 4905-9942 Speaker Skirt 3
Sale price$10.75
Regular price$12.90
Not in stock - available on backorder - lead time on request
Simplex
Simplex 562-729 64/64 LED/Switch Controller Board, Daughter Card
Sale price$284.00
Regular price$340.80
In Stock
Simplex
Simplex 565-226 8-Point Zone Module, Class B, 4100U/4100ES
Sale price$194.40
Regular price$233.28
In Stock
Simplex
Simplex 565-217 4100 Remote Unit Interface (RUI) Board, Class A Capable
Sale price$449.30
Regular price$539.16
In Stock






