https://stream.echo6.co/videos/watch/c08b4a6a-fdbb-4f59-a875-33013b9e754c What's inside a Dräger Multiwarn II gas detection warning system used in mining, oil, chemical, and emergency services etc to detect hazardous or explosive atmospheres. Intrinsic safety design and how both catalytic bead and infrared IR gas detectors work, and pellistors. And a teardown of a Hydrogen Sulfide (H2S) sensor. http://www.a11supply.com/images/file/rev1_MultiWarn%20II_En.pdf http://www.draeger.com/sites/assets/PublishingImages/Products/cin_x-am_5600/US/draeger-sensor-portable-handbook-9046571.pdf http://www.xinpian.net/MOTOROLA/MC68HC711/MC68HC11E1.pdf Forum: http://www.eevblog.com/forum/blog/eevblog-603-gas-sensor-teardown-drager-multiwarn-ii/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Wed, 10 Jun 2026 06:59:20 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/c08b4a6a-fdbb-4f59-a875-33013b9e754c All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.