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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 49AV-WRQ TrueAlert ES Addressable Horn Strobe "FEU"
Sale price$82.95
Regular price$99.54
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49CMTV-WWF Non-Addressable Multi-Tone Horn Strobe, White, FIRE, 520 Hz
Sale price$115.15
Regular price$138.18
In Stock
Simplex
Simplex 59AO-WWS TrueAlert ES LED Addressable Horn Appliance
Sale price$36.50
Regular price$43.80
In Stock
Simplex
Simplex 59AO-WRS TrueAlert ES LED Addressable Horn Appliance
Sale price$32.20
Regular price$38.64
In Stock
Simplex
Simplex 4007-9810 4007ES Modular NIC
Sale price$404.80
Regular price$485.76
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4098-9852 In-Duct Adapter
Sale price$70.30
Regular price$84.36
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4190-9010 Bi-Directional Fiber Optic Coupler, Multimode, ST Connectors, for Single-Fiber Network Links on Fiber Media Modules
Sale price$1,562.95
Regular price$1,875.54
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49CMTV-APPLW TrueAlert Non-Addressable MultiTone Horn Strobe
Sale price$89.75
Regular price$107.70
In Stock
Simplex
Simplex 734-078 Harness, 4100ES/4100U TIC to Legacy Power and Communication
Sale price$27.10
Regular price$32.52
In Stock
Simplex
Simplex 166-226 Ribbon Harness, LED/Switch Display Card, 2 in.
Sale price$7.05
Regular price$8.46
In Stock
Simplex
Simplex 1409-5010 Ribbon Ep40/Ep800/Lt5000 Purple
Sale price$23.80
Regular price$28.56
Only 2 units left
Simplex
Simplex 4081-9019 End-of-Line Resistor Harness, 4081 Series
Sale price$1.35
Regular price$1.62
In Stock











