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Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations.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 2084-9018 Phone Ptt Armor Break-Rod
Sale price$537.65
Regular price$645.18
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2190-9160 MPX Signal ZAM Class A (Style Z) Flush MAPNET II Module
Sale price$123.85
Regular price$148.62
Contact Us for Alternatives
Simplex
Simplex 4007-9803 IDNet 2 Loop Expansion Module
Sale price$111.20
Regular price$133.44
In Stock
Simplex
Simplex 4010-9818 Wired Network Media Card
Sale price$161.95
Regular price$194.34
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4098-9612 Fixed Temperature (Replaced by 4098-5611)
Sale price$34.40
Regular price$41.28
Contact Us for Alternatives
Simplex
Simplex 4903-9197 TrueAlert Non-Addressable Speaker Strobe, Round Ceiling Mount, 30 cd, White
Sale price$118.60
Regular price$142.32
Contact Us for Alternatives
Simplex
Simplex 4904-9169 75Cd Red Non-Addressable Strobe
Sale price$73.25
Regular price$87.90
Contact Us for Alternatives
Simplex
Simplex 4904-9170 TrueAlert Non-Addressable Strobe
Sale price$65.95
Regular price$79.14
Only 29 units left
Simplex
Simplex 4905-9929 TrueAlert Addressable Isolator+ Module, IDNAC SLC Short Circuit Isolator
Sale price$125.25
Regular price$150.30
In Stock
Simplex
Simplex 49CMT-WRF TrueAlert Conventional Multi-Tone Horn, Red, FIRE
Sale price$51.85
Regular price$62.22
In Stock
Simplex
Simplex 565-792 Expansion Power Supply Card
Sale price$440.35
Regular price$528.42
Not in stock - available on backorder - lead time on request
Simplex
Simplex 677-202 Detector Base with Relay, 4098 Series
Sale price$57.00
Regular price$68.40
In Stock
Simplex
Simplex 742-351 Power Distribution Interface PDI Service Part, 4100U and 4100ES Expansion and Remote Bays
Sale price$167.45
Regular price$200.94
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4081-9002 End-of-Line Resistor Harness, 3.3k Ohm 1 W, Class B
Sale price$7.45
Regular price$8.94
In Stock
Simplex
Simplex 565-905 Duct Detector Board
Sale price$79.30
Regular price$95.16
Not in stock - available on backorder - lead time on request
Simplex
Simplex 2975-9452 Fire Alarm 3 Bay Box Solid Door
Sale price$1,123.40
Regular price$1,348.08
In Stock
Simplex
Simplex 4010-9830 Sup Releasing Applique Kit
Sale price$10.85
Regular price$13.02
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4098-9824 Truealarm Round Duct Adaptor
Sale price$96.70
Regular price$116.04
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4098-9846 Sensor Guard for TrueAlarm Sensors
Sale price$179.85
Regular price$215.82
In Stock




