Newsgroups: comp.robotics
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From: johnb@sgi.dev.cdx.mot.com (John Bottoms)
Subject: Polaroid(tm) Sonar Transducers
Message-ID: <1993Sep24.202447.10907@merlin.dev.cdx.mot.com>
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Organization: Avalon Systems Inc. 
Date: Fri, 24 Sep 1993 20:24:47 GMT
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A number of participants have ordered Sonar boards and transducers. These
were sent out last week and some have notified me of receipt.

I have some Polaroid(tm) Sonar Transducers available. These are new units
and are the instrument grade transducers that are available as part of the
kits. These are unused and available for $10 + $2 S/H (up to 5 units).
These are recognized by the 3 sections cut out of the retaining clip in
the back of the unit, one of which is an elogated triangle. Diameter is
1.69", aperature is 1.513". 

Note: if you are new to these unit, you must have a transmitter board
      to use these. The most common use is with relays to multiplex the
      sensors for a common board. The applied voltage is 300V at 330-400 pf.

These units are available from Polaroid for $16 in quantities of 10 units.

Contact me if you are interested.

 -John Bottoms
  26 Westvale Drive
  Concord, MA 01742
  tel: 508/369-4233
 
