Pretty loud voice alarm but you can muffle speaker on back. Has not picked up any of the gas odors I bought it for yet. Air quality TVOC's go up during the times I smell gas, so perhaps it's not quite as sensitive as my nose? More research is necessary by me. Would be great for RVs and propane use.
Best Exposimeter with Very Loud and Flashing RED ALARM!!!!
very loud alarm and bright flashing red light ..as it should be. If you have leaking gas, loud and flashing alarms are appropriate. Perfect for hearing challenged.