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2nd Feb 2017, 11:10 am | #1 |
Dekatron
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,766
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'Sonic' (not ultrasonic!) Cleaners (DIY)
The recent thread on an ultrasonic cleaner prompts me to mention the DIY cleaners - often mistakenly referred to as 'ultrasonc' - which use 'palm sanders' attached to a metal or plastic container. A palm sander runs at maybe 25,000 vibrations per minute, so that's about 400Hz - one hundredth of the frequency of an ultrasonic bath at 40kHz. Hence, they're 'sonic' rather than ultrasonic, as is abundantly evident the moment you switch a palm sander on! Whereas an ultrasonic cleaner works on the basis of 'cavitation' a cleaner powered by a palm sander can only achieve 'agitation'. Nevertheless, claims are made that they can be quite effective, though I make no such claims myself.
Here's one such example, incorrectly referred to as 'ultrasonic' by someone who knows no better: https://www.bing.com/videos/search?q...=0&FORM=VDQVAP There are similar examples along the same lines on youtube.
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David. BVWS Member. G-QRP Club member 1339. |