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Teardown of a bizarre looking Banshee 343 Ultrasonic Gas Leak Detector Thumbs up this video and pinned comment if you want to see a countdown timer refit project!
Datasheet: https://www.instrumart.com/assets/Net-Safety-Banshee343-datasheet.pdf
Manual: https://www.instrumart.com/assets/Net-Safety-Banshee343-manual.pdf
Forum: https://www.eevblog.com/forum/blog/eevblog-1489-mystery-teardown/
Youtube:
