Ultrasonic transducers?

[Brian]

Anyone know of any good sources for waterproofed ultrasonic transducers (for
under $20)? Tried Google, without much success.
Brian

 

[Henry Kolesnik]

Fish and depth finder replacements?
Also ebay.

--

73
Hank WD5JFR
"Brian" <bellis350@comcast.net> wrote in message
news:aIWdnd55QdM4FETcRVn-ug@comcast.com...

Anyone know of any good sources for waterproofed ultrasonic transducers
(for under $20)? Tried Google, without much success.
Brian

 

[Brian]

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news_gCd.6583$F67.3250@newssvr12.news.prodigy.com...

Fish and depth finder replacements?
Also ebay.

--

73
Hank WD5JFR
"Brian" <bellis350@comcast.net> wrote in message
news:aIWdnd55QdM4FETcRVn-ug@comcast.com...
Anyone know of any good sources for waterproofed ultrasonic transducers
(for under $20)? Tried Google, without much success.
Brian

Sorry, I should've been a little more specific. I need it for proximity
checking, from 6 inches to about 20 feet. It won't be in water, but it will
be exposed to it. It's frequency needs to be about 40 Khz. I may need a lot
of them in the future.
Brian