Air Systems International carbon monoxide sensor for CO-91 series monitors. Comes with 2-year manufacturer limited warranty.

• Carbon monoxide sensor for CO-91 series monitors
• Carries 2-year manufacturer limited warranty
• For use with Mfr. Part No. CO-91, CO-91IS, CO2-91, CO2-91IS, BB50-CO, BB15-CO, BB30-CO, BB100-CO, BB30-COIS, BB50-COIS, BB100-COIS