I am an HVAC service tech. This combustible gas detector is a professional quality tool, it works exceedingly well and is unbelievably sensitive. It’s sold at a number of HVAC parts houses. It detects basically any combustible gas at levels at least as low as 50 ppm (parts per million).
It is not auto-zeroing which I actually prefer. That means it doesn’t automatically desensitize itself with exposure to combustible gas. You can adjust the sensitivity yourself as needed meaning you can decrease sensitivity as the area is saturated with gas and you zero in on the leak and at ANY point you can crank the sensitivity back up without having to wait a long time or restart the detector & move back outside. It also means when you initially start it up you have to adjust it to the required baseline. Give it a minute or two to warm up & adjust it to a few clicks per second.
I’ve used this detector at least 8 or 10 times so far. It pick up instantly with no delay & recovers very quickly. On both accounts it is MUCH better than my previous detector. It is also INSANELY sensitive and I mean CRAZY sensitive. A funny experiment, it’s so sensitive that it will detect methane when you put it close to anyone’s rear end and that’s when they are not passing gas.
The point being, don’t let the extreme sensitivity of this detector drive you crazy. It WILL pick up on the most insanely small “leaks”. I would suggest confirming all leaks found by this detector with a bubble solution. Not because of the reliability of the detector but because the leak could be so small as to be insignificant. Gas lines typically hold no more than 2-3 PSI of gas (on your side of the gas meter). They are tested & passed at 10 PSI. By their nature, gas lines are not exceptionally tight. Most gas lines, if pumped up to 10 PSI & left for a week, will have lost a good amount of pressure. My point being, if you find a leak with the gas detector but it won’t show up with a bubble solution PROPERLY ADMINISTERED it’s too small to worry about. You could search the entire gas line on a small old house & probably find over a dozen “leaks” that small and it could still pass the pressure test.
Here’s another pointer, sometimes it’s normal to smell a little gas. What? That can’t be right? Your gas meter has a pressure relief on it. It will, from time to time, purge a little gas, especially when gas appliances are turning on & off. Just because you smell gas when you walk by the meter doesn’t mean there’s a problem. When your gas furnace shuts off the gas valve closes and the gas inside the distributor equalizes to the ambient pressure, but it’s inside an enclosed tube so not every last bit gets blown out of the flue by the inducer motor. Everything shuts down and over minutes that tiny amount of gas slowly dissipates. If you pull the door off the burner compartment of your furnace at the right time you’ll smell gas. This detector will pick up on it. It’ll hit big right at the orifices where the gas comes out. That doesn’t mean there’s anything wrong.
What I’m getting at is, be safe with gas but understand just how sensitive this detector is and if you’re not sure what is or isn’t normal call a professional. The professional would be more than happy to have this detector in his arsenal of tools.
|商品尺寸||38 x 102 x 203 毫米|
|型号 / 款号||CD100A|
|配绳材质||Voltage-testing, Hvac-technician, Automotive-repair, Electrician|
|包装清单||Manual, 1 Year Limited Warranty, 9V Battery|