4 Gas Monitor Rechargeable Portable Gas Detector H2S O2 CO and LEL Multi Gas Monitor Professional Gas Sniffer with LCD Display Sound Light Vibration Alarm Mode.

HSE safety is important, we like to keep new 4 gas analyzers in stock in the event of a detector going over its time limits.

Product shipped extremely fast. A great value for your money.

I used this product once. The second time, it went into alarm in clean air. No way to adjust. No instructions. No product support. Guess what? It's outside of return window. Nice work Amazon!

We live in a tiny home currently while waiting for our house to be finished out. We have propane going to a couple of appliances. I wanted to use this unit inside to ensure that there were no issues with propane leaks or CO build up. So far, so good. If you breath on the unit, you can set off the O2 alarm. I unscrewed the connection to our propane appliance and I saw the unit increase in level as well. It feels very light for what it does but I'm assuming the sensors and board are near the center of the inside of the unit to help keep them protected? I do agree with another reviewer that it feels cheap, but it seems to be working great so far. It's a little pricey and hopefully it lasts a while. The charge on the battery seems to do really well (I get about 24 hours of operation on a charge). I will update my review should anything change.

This device could save your or your loved ones lives, it will stay on stand by analyzing the air for weeks before needing its battery to be recharged. As soon as the values go out of a programmed range, it will sound an alarm and will loudly explain the reason. It really is an important tool even for old cars where the engine can leak some gases, for natural gas heated rooms or boilers in basements, etc. The alarm turns off as soon as the levels reach a normal level or you turn it off from the buttons. Fully programmable and comes with a cover to install a hose if you're using a compressor for scuba tanks and want to have a some control on what youre putting in there. Feels solid and durable. Hope this was helpful.