Just got my Extech EZ40 EzFlex and it works great. I opened the box and read the 3 page instructions. They installed the three batteries that come with the device and took it to a place where there is no gas to warm it up, and when it was done they tested it. To make sure it worked, I blew some natural gas out of my stove and he recognized it right away. I knew it worked! I then proceeded to use it for what I originally bought a device for, which was to track the location of a sewage leak that this device was able to pick up due to methane. When I entered the room with the problem the device started shutting down and when I put it where I thought the cause of the problem was the device going crazy. The device comes with a nice case for easy storage and is quite well built. What I liked the most was the ease of use; Unpack, prepare and use within 15 minutes. I would recommend this device to anyone who needs to monitor flammable gas leaks. I would even recommend it to anyone who has natural gas because this device makes it easy to check all of your pipes. It is so cheap to buy that you can check the equipment once a year.
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