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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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-WWF TrueAlert ES Addressable Visible Only Strobe, Wall Mount, White, FIRE Lettering
Sale price$79.95
Regular price$95.94
In Stock
Simplex
Simplex 9500-867 Cover 4098 Sensdet 60PKG
Sale price$60.15
Regular price$72.18
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4906-9131 TrueAlert Weatherproof Horn Strobe, 15/60/75 cd, NEMA 3R, Red, Weatherproof Box Ordered Separately
Sale price$82.55
Regular price$99.06
In Stock
Simplex
Simplex 49SV-APPLW TrueAlert ES Addressable Speaker Strobe
Sale price$131.10
Regular price$157.32
In Stock
Simplex
Simplex 4098-9754 Multi-Sensor Photoelectric and Heat Sensing
Sale price$81.15
Regular price$97.38
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Simplex
Simplex 4906-9102 TrueAlert Multi-Candela Strobe, Ceiling Mount, 15/30/75/110 cd, Red, FIRE Lettering
Sale price$47.90
Regular price$57.48
In Stock
Simplex
Simplex 4098-9770 TrueAlarm CO Sensor Base, Standard operation
Sale price$180.85
Regular price$217.02
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49MP-SVWW TrueAlert ES S/V Wall Back Plate, White
Sale price$9.05
Regular price$10.86
In Stock
Simplex
Simplex 742-342 System Power Supply (566-071)
Sale price$1,308.90
Regular price$1,570.68
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-7158 Master Controller CPU Card with Ethernet Connection Upgrade Kit, for 4100U and 4100+ Panels
Sale price$1,477.25
Regular price$1,772.70
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49VO-WRF TrueAlert ES Addressable Strobe, Visible Only, Wall Mount, 15/30/75/110/135/185 cd, Red, FIRE Lettering
Sale price$75.45
Regular price$90.54
In Stock
Simplex
Simplex 4098-9845 Weatherproof Duct Housing Enclosure
Sale price$565.25
Regular price$678.30
In Stock
Simplex
Simplex 2099-9754 Single Action Manual Pull Station, Non-Coded Non-Addressable, General Alarm
Sale price$35.05
Regular price$42.06
In Stock
Simplex
Simplex 4906-9254 TrueAlert Addressable Multi-Candela Speaker Strobe, Ceiling Mount, White
Sale price$110.05
Regular price$132.06
In Stock
Simplex
Simplex 49AV-WRF TrueAlert ES Addressable Horn Strobe
Sale price$85.65
Regular price$102.78
In Stock
Simplex
Simplex 4906-9129 TrueAlert Multi-Candela Horn Strobe
Sale price$51.10
Regular price$61.32
In Stock
Simplex
Simplex 4098-9403 Heat Detector Fixed Temperature
Sale price$41.85
Regular price$50.22
In Stock






