My 94 year old mother thought she smelled of gas. Numerous parts in her 1950 home were found to be leaking. The gas company shut off the gas, and firefighters brought in huge fans to blow out the air. It took the plumber 3 days to fix everything. Fortunately there were no smokers in the house. I thought it was worth a hundred dollars to know that my own house was good, as were my two daughters. Bought this detector and was very impressed. At home I found a small leak in the gas valve, I didn't feel the smell. My daughter's house was checked well. The detector even picked up a few ppm on my breath after an evening shot of KY bourbon. Seems to be very well made and has two levels of sensitivity, an easy to read screen and a solid build. Peace comes as a blessing. If you don't buy, borrow.
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