The Simplex 4098-9770 TrueAlarm CO sensor base integrates an electrolytic carbon monoxide sensing module with a TrueAlarm analog sensor, providing multi-gas detection from a single system address. Carbon monoxide is an odorless, colorless gas produced by incomplete combustion — monitoring CO levels can warn of harmful concentrations and provide early indication of incipient fire conditions when combined with photoelectric sensor data from the same location.
Key Features
- Combines electrolytic CO sensing module with TrueAlarm analog sensor
- Single IDNet system address for both CO and analog sensing
- CO sensor can be enabled/disabled via panel software
- Supports LED/Switch modes and custom control
- Can be made public for network-wide communication across a fire alarm network
- Compatible with multiple Simplex TrueAlarm sensor heads
- Dimensions: 5 × 5 × 1 in; Weight: 0.25 lbs
Compatible Panels
The 4098-9770 is for use with Simplex TrueAlarm-compatible fire alarm control panels using IDNet communications, including the 4007ES, 4010ES, 4100ES, and 4100U series.
Compatible Sensor Heads
The 4098-9770 base accepts the following Simplex TrueAlarm sensor heads: 4098-9714, 4098-9754, and 4098-9733.
CO Cartridge Replacement
Replacement CO cartridges for the 4098-9770 are available as the Simplex 4098-9747 CO Replacement Cartridge.
Life Safety Consultants has specialized in commercial fire alarm replacement parts since 2002. For questions about the 4098-9770 CO sensor base, call 1-888-557-0558 or email sales@lifesafetycom.com.
Additional information
| Weight | 0.25 lbs |
|---|---|
| Dimensions | 5 × 5 × 1 in |
| Condition | New |
| Part Type | Analog, Base, CO Cartridge / Module, Detector Base, Sensor |
| Manufacturers | Simplex |
| Compatible Panels | Simplex 4007ES, 4010ES, 4100ES, 4100U (IDNet-compatible panels) |
| Compatible Bases | 4098-9714, 4098-9754, 4098-9733 |
| Electrolytic CO + TrueAlarm analog; single IDNet address; 5 x 5 x 1 in; 0.25 lbs; replacement cartridge | 4098-9747 |











