Protmex Portable 4-in-1 Carbon Monoxide & CO2 Monitor
In my search for a reliable air quality solution, I put the Protmex Portable 4-in-1 Carbon Monoxide Monitor to the test across several different indoor settings. This device is impressively small, yet it packs the necessary sensors to keep a watchful eye on both CO and CO2 levels.
Performance & Build Quality
The device feels solid in hand despite its mini footprint, featuring a durable construction that holds up well to frequent transport. Its magnetic suction capability is a standout feature, allowing for secure mounting on metallic surfaces without any need for complex installation tools.
Day-to-Day Experience
Using the monitor is straightforward, with the Type-C rechargeable battery offering a full 48 hours of continuous operation from a quick 2.5-hour charge. The interface is intuitive, and the audible alarm provides a necessary layer of security that triggers reliably when levels shift outside of the safe range.
This monitor is ideal for commuters, remote workers, or anyone who frequently spends time in shared or enclosed spaces and wants to monitor their air quality.
Final Thoughts
With an exceptional rating of 4.92/5, the Protmex 4-in-1 stands out as a top-tier safety tool for 2026. Given the $59.00 price tag, it offers excellent value by prioritizing essential safety in a truly portable package.