I have been in the heating industry for 35 years and have seen many examples of "commercial" gas leak detectors. There have always been gas testers that were too expensive to buy and permanently calibrated; The first breakthrough I remember was the Tif8800, which was inexpensive and field calibrated. Not to mention the crappy nature of its rechargeable batteries, if you calibrated it per the instructions it was insanely over-sensitive and could literally stumble onto the sensor while breathing. Last time I checked I wasn't exhaling methane. Fast forward to my recent need for a leak detector, I settled on a few different 'current line' options and a few cheap Revain alternatives. One of them was completely useless (no wonder it simulated a tif8800). This is another - over the course of the day I found 3 gas leaks that I didn't feel (they were all cheesily repaired). Within a week I found 6 in total. I have recommended to my boss to get one for each field worker and I suspect it will be because of the price. This is far from a LEL detector. We do not have LEL detectors, we cannot afford entry. If you smell gas we will use bubbles to detect a leak or use one of the available sniffing options. One, like the UEI100 I bought, uses field calibration like the Tif8800, but is vastly improved as it's less prone to false alarms and its rechargeability seems vastly improved. An example of a different style is the Klein sensor (which I also bought) which isn't adjustable like the UEI but has a high and low sensitivity setting and has never shown a propensity for false alarms. low sensitivity. No false alarms and leak detection you won't feel. This is not the right device if you are dealing with a person who is hypersensitive to ethyl mercaptan (natural gas odorant in our area - these vary, check with the gas service) - you need one of those "false sniffers with an alarm" . or Gas Service Holding. But for a field worker, that's a brilliant thing! It weighs nothing and fits in a pocket that I haven't used yet, in my tool bag. Five stars just for the form factor and the fact that it doesn't suck.
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