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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 6334-9144 6 Digit Red Blue Screen
Sale price$1,154.25
Regular price$1,385.10
Not in stock - available on backorder - lead time on request
Simplex
Simplex 733-882 Expansion Power Supply Harness
Sale price$68.90
Regular price$82.68
Only 8 units left
Simplex
Simplex 8565-479 4005 Main Power Supply / Battery Charger Assembly
Sale price$3,097.80
Regular price$3,717.36
Only 1 unit left
Simplex
Simplex 4007-9102 4007ES Hybrid Fire Alarm Control Panel, Platinum Cabinet
Sale price$1,450.30
Regular price$1,740.36
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-0640 Infoalarm Memory Expansion Module
Sale price$349.10
Regular price$418.92
In Stock
Simplex
Simplex 562-747 PC Board 8 Main Switch
Sale price$185.60
Regular price$222.72
Only 11 units left
Simplex
Simplex 4005-9807 Power Distribution Module
Sale price$99.15
Regular price$118.98
Only 15 units left
Simplex
Simplex 740-683 4100 Series Service Part
Sale price$50.90
Regular price$61.08
Only 5 units left
Simplex
Simplex 166-228 34 Inch Ribbon
Sale price$76.55
Regular price$91.86
Not in stock - available on backorder - lead time on request
Simplex
Simplex 562-905 Audio Amp Assy 4100
Sale price$755.25
Regular price$906.30
Not in stock - available on backorder - lead time on request
Simplex
Simplex 562-943 MAPNET II Signal ZAM, Style Z (Class A)
Sale price$110.10
Regular price$132.12
Only 2 units left
Simplex
Simplex 562-944 MAPNET II Distributed Power IAM
Sale price$144.15
Regular price$172.98
Only 9 units left
Simplex
Simplex 565-274 UT Universal Master
Sale price$224.50
Regular price$269.40
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2080-9061 Add-On N/O and N/C Contact Mod
Sale price$20.50
Regular price$24.60
In Stock
Simplex
Simplex 2080-9069 Fire Suppression Maintenance Disconnect Switch, Flush
Sale price$176.45
Regular price$211.74
In Stock
Simplex
Simplex 2099-9149 Double Action Manual Release Station, Unmarked, Requires Label Kit 4099-9802
Sale price$38.15
Regular price$45.78
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2099-9758 Non-Coded Double Action Manual Pull Station
Sale price$85.55
Regular price$102.66
In Stock






