Are piezoelectric disc-type buzzers waterproof?

They might not be but their big brothers the SONAR T/R units use?piezoelectric crystals in contact with water. Rod ________________________________ From: Jules Richardson <jules.richardson99 at gmail.com> To: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Sent: Monday, 12 May 2014, 23:40 Subject: Re: Are piezoelectric disc-type buzzers waterproof? On 05/12/2014 04:59 PM, Tony Duell wrote: Yes, good point. I did do some googling in the end (should have done that first!) and some manufacturers seem to state that theirs are not waterproof (perhaps the problem is with whatever is used to bond the plate to the disc) - with that in mind, I ended up being careful not to get this one wet, just in case. Thankfully the buzzer was at the other end of the case (more or less) to the battery compartment. All *seems* to be well now, other than the -ve wire from the battery compartment needing replacing; the system powers up and seems to "work" - I just need to remind myself how to play chess :-) cheers Jules