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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 2081-9271 Sealed Lead-Acid System Battery, 12V 33Ah at 20-Hour Rate, Rectangular Case
Sale price$83.20
Regular price$99.84
Not in stock - available on backorder - lead time on request
Simplex
Simplex 743-180 LCD Display
Sale price$274.15
Regular price$328.98
Contact Us for Alternatives
Simplex
Simplex 562-727 Auxiliary Relay Motherboard, 2 Amp, 32-Point, Without Suppression
Sale price$108.10
Regular price$129.72
In Stock
Simplex
Simplex 733-945 Battery Harness Kit
Sale price$14.95
Regular price$17.94
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2088-9008 MR-101/C SPDT Control Relay, Track Mount with Cover
Sale price$37.20
Regular price$44.64
In Stock
Simplex
Simplex 4010-9912 Serial DACT
Sale price$354.45
Regular price$425.34
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4099-9021 Addressable Manual Pull Station, Single Action NO GRIP, IDNet or MAPNET II
Sale price$52.35
Regular price$62.82
In Stock
Simplex
Simplex 4100-6302 Single-Mode Duplex 4120 Fiber Media Card
Sale price$427.65
Regular price$513.18
In Stock
Simplex
Simplex 4905-9923 Surface Mount Box, Red, for Rectangular A/V or S/V Appliances
Sale price$38.50
Regular price$46.20
In Stock
Simplex
Simplex 49SOC-WWBLANK-O Cover Weatherproof White
Sale price$13.45
Regular price$16.14
In Stock
Simplex
Simplex 49VO-APPLWE TrueAlert ES Addressable Strobe
Sale price$67.55
Regular price$81.06
In Stock
Simplex
Simplex 49VO-WRF-BA TrueAlert ES Addressable Horn Strobe
Sale price$105.90
Regular price$127.08
In Stock
Simplex
Simplex 49MP-AVVOWR Red Wall Mounting Plate for TrueAlert ES
Sale price$10.50
Regular price$12.60
In Stock
Simplex
Simplex 49VOH-APPLC-O TrueAlert ES Weatherproof Ceiling Strobe, Visible Only, Multi-Candela, Appliance Only
Sale price$192.00
Regular price$230.40
In Stock
Simplex
Simplex 49SVC-CWALT-O SV Cover, Ceiling White Alert WP
Sale price$21.85
Regular price$26.22
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4004-9302 4004R Basic Suppression Releasing Panel, Red, 4 IDC 2 NAC 2 RAC, 120-240 VAC
Sale price$847.45
Regular price$1,016.94
In Stock
Simplex
Simplex 4100-1267 Expansion Signal Module Class A Adapter
Sale price$107.90
Regular price$129.48
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1240 Auxiliary Audio Input Module, Four Unsupervised Inputs
Sale price$237.35
Regular price$284.82
Not in stock - available on backorder - lead time on request
Simplex
Simplex 59AV-WRFO TrueAlert ES LED Addressable Horn Strobe
Sale price$242.35
Regular price$290.82
Not in stock - available on backorder - lead time on request




