10 Best Combination Gas & Carbon Monoxide Detectors 2025

If there's one product that you absolutely need to get for your home, it's a combination gas and carbon monoxide detector. These devices not only monitor the air in your house for dangerous levels of gas and CO, but they also alert you when something is amiss. At Top 10 Product Reviews, we've scoured the market for the best combination gas and carbon monoxide detectors and we found products ranging from a 7.5 score up to a 9.9 score. And the top rated device? The MSA Altair 4X Multigas Detector 10107602. This product from MSA is the gold standard for home safety, with the ability to detect LEL, oxygen, hydrogen sulfide and carbon monoxide. Plus, it even has a motion alert feature to ensure that you're always aware of what's happening in your home. Don't skimp on home safety - invest in the MSA Altair 4X today.