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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 2975-9212 Surface Mount Box, Red Steel, for 2099 Series Cast Metal Stations
Sale price$16.25
Regular price$19.50
In Stock
Simplex
Simplex 4006-9801 Expans Power Supply Convention
Sale price$450.15
Regular price$540.18
Contact Us for Alternatives
Simplex
Simplex 4010-6303 4120 MM-L Duplex Fiber Media Card, Multi-Mode Left Port
Sale price$371.45
Regular price$445.74
In Stock
Simplex
Simplex 4098-9615E SSD Heat Detector 200 ROR
Sale price$36.90
Regular price$44.28
Only 2 units left
Simplex
Simplex 4098-9847 Extension Box
Sale price$78.75
Regular price$94.50
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4099-5204 Outdoor Callpoint with LED
Sale price$220.15
Regular price$264.18
In Stock
Simplex
Simplex 4100-0633 Transponder Tamper Switch
Sale price$72.20
Regular price$86.64
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-0638 Additional 24 VDC Harness for 4100 Slot Modules
Sale price$27.30
Regular price$32.76
In Stock
Simplex
Simplex 4100-1248 100W NAC Expansion, 6 Class B
Sale price$257.35
Regular price$308.82
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1255 Operator Interface LED Switch Module
Sale price$110.10
Regular price$132.12
In Stock
Simplex
Simplex 4100-1277 Pluggable LEDs
Sale price$275.85
Regular price$331.02
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1288 64/64 LED/Switch Controller
Sale price$454.60
Regular price$545.52
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-6061 Redundant Modular Nic
Sale price$691.60
Regular price$829.92
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-9600 MINIPLEX Basic Transponder Bay Assembly with PDI, RUI, Box Ordered Separately
Sale price$596.65
Regular price$715.98
In Stock
Simplex
Simplex 4190-6036 TrueSite Workstation Wired Media Card
Sale price$232.10
Regular price$278.52
Only 3 units left
Simplex
Simplex 4903-9361 TrueAlert Speaker/Strobe White 110 cd
Sale price$92.40
Regular price$110.88
Only 22 units left
Simplex
Simplex 4906-9107 Alert MC VO Non-Addressable
Sale price$84.15
Regular price$100.98
In Stock





