You're probably picking up hydrogen gas, which is produced when lead-acid batteries are overcharged at high charging voltages (a danger in its own right). I do not know what gas batteries would put off and the CO-220 has a senor for CO only. I contacted Fluke and they responded with: ![]() Sensor type | Stabilized electrochemical Gas-specific (CO) The CO-220 manual says nothing about any gasses other than CO. So I believe the answer here to be "no".Ĭan a Fluke CO-220 detect gasses other than carbon monoxide? This article discusses the chemical reactions of a lead-acid battery, and as far as I can tell there is no carbon involved whatsoever. After this, the CO levels were at zero.Ĭan lead-acid batteries leak carbon monoxide? Mechanics replaced the batteries, and ensured the battery box was properly sealed and vented. I watched it count up through 600, 800, 900 before indicating OL. The OL on the display of the CO-220 indicates a value of >1000 ppm CO. We eventually found the source of the CO to be a large lead-acid "house" battery which was warm and leaking: ![]() In the generator engine compartment, the CO level was zero (while the generator was running). Inside the cabin, a Fluke CO-220 was reading 40 ppm. I recently found myself troubleshooting a CO alarm on a houseboat.
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