I use the PLV-100. When I'm being suctioned someone can put a "plug" (we
use fortlite adaptors from et tubes) in the swivel adptor to silence the
alarm. That doesn't work on the LP-6, you have to listen to the alarm the
whole time unless you turn it off. The 15 sec alarm silence button is not
that convent.
I used the LP-6 for 1 day and didn't like it, besides the problem with the
alarms it's lounder than the PLV-100. Sounded like Darth Vader was behind
me the whole day!
Jim Lubin
http://www.eskimo.com/~jlubin
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Vent Users' Support Page is located at:
http://www.eskimo.com/~jlubin/disabled/vent