System Sensor CO-REPL is the replacement carbon monoxide (CO) sensor for i4 Series COSMO-2W (2-wire) and COSMO-4W (4-wire) combination CO and photoelectric smoke detectors. It provides a 10-year CO cell life.
CO-REPL: Replacement Carbon Monoxide Sensor · Compatible with i4 Series COSMO-2W and COSMO-4W
Replacement carbon monoxide (CO) sensors for the i4 Series COSMO-2W 2-wire and COSMO-4W 4-wire combination CO and photoelectric smoke detectors
Documents & Downloads
When to replace the CO cell
The CO sensor in a COSMO detector has a limited life of approximately ten years from the date of manufacture. When the sensor passes end of life, the detector sends a trouble signal to its interface module and on to the control panel. A sticker on the replaceable CO cell shows the replacement date; remove the detector head to read it. To swap the cell, depress the two tabs on the CO sensor, pull it out and insert the CO-REPL.
Compatibility
Use the CO-REPL only in these i4 Series detectors:
FAQ
How long does the CO cell last?
About ten years from the date of manufacture, per the System Sensor COSMO manual.
Do I replace the whole detector?
No. The CO cell is a replaceable module inside the detector head; the CO-REPL replaces just that cell.
