X-Sense XP0H-WN 4 / 5 Very good pros and cons Pros The X-Sense XP0H-WN features smoke and carbon monoxide detection. My home is almost three decades old, and when I moved in, it still had the original smoke detectors. This is, of course, less than ideal, as smoke detectors must be replaced every 10 years -- seriously. ZDNET's buying adviceMaria Diaz/ZDNETThe X-Sense XP0H-WN smoke and carbon monoxide detectors are a reliable, interconnected wireless option to replace your 10-year-old smoke detectors. They offer a simple alternative to wired smoke detectors, with a carbon monoxide sensor for added safety.