We investigated the same, but haven't had the opportunity to try
anything.  So, no opinion on how well it works, especially in a HAST
environment.  But, maybe it will work for you.

Good Luck,
Glenn

Source:

Honeywell Micro Switch Sensing and Control
Temperature and Moisture Sensors
HyCal Sensing Products
(818) 444-4000
Get Your Private, Free Email at http://www.hotmail.com

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