Gas Leak Detector 4-in-1 (H2S, EX, O2, CO) - Reliable Home and Workplace Safety Monitor with Precise Detection - Rechargeable, Rugged Build, Instant Alerts - Temperature Range: 14°F to 131°F

I like that this comes with a storage bag and it shows the numbers on screen. I thinks it's also great because it tells you the level of dangerous for each number on the detections. It is not to big, so it doesn't take up much room to store it either. As far as I can see it charges well and is pretty accurate as well.

Came quickly, easy to use. Comes with a case, made of very sturdy material. Compact size and long lasting battery.

Works

This is a great gas meter and safety device. If you do anything in confined spaces, such as going in tanks or even crawl spaces, this is a good tool to have on your person with its ability to monitor O2, Hydrogen sulfide, CO, and combustible gasses. I don't have any way of measuring its accuracy, but it did detect natural gas from my stove and propane from my grill. I'm a scuba diver and I have a bottle of Nitrox at 33% oxygen, I put this next to the regulator and cracked open the valve and it read 30%. I think that might be the highest this thing reads. Overall I think that this is a great safety tool, easy to use, the rechargeable battery lasts a long time and it has alarms (vibration, visible and sound) to alert you if there is a dangerous situation. The battery is charged with a USB-C connection. The unit is intuitive and easy to use, especially if you have any experience with leak or gas detectors. I'm not sure of the lifespan of the sensor since the advertisement says 2 years and their documentation says 1 year, that is the reason I took off one star. I'm also not sure of how to tell when the sensor is bad, maybe it will error out?I still would recommend this product.

The gas detector meter is a must have for safety to analyze the air quality in confined spaces BEFORE entering in. I bought it to inspect for any natural gas leak in the pipes located at the basement of a new construction house.I have tested the gas detector meter in a range to dectect natural gas and it worked pretty well, the OPPM percentage reading went up very fast. I liked it!

Unsuitable for an alarm. This device automatically powers down after 30 minutes, and that parameter cannot be changed. In most situations the need for monitoring and an alarm extends well past 30 minutes.The battery is good for between 7 to 30 hours. In battery charging mode this does not monitor.A proper monitor and alarm will stay on until turned off and continue to work in the battery charging mode.

Rugged built , easy to set up.

I just got this gas monitor and waiting to put it to the test. Took a while to charge it to the point that it would operate. I will report back on my tests.