Anyone know if hobbs switches are meth compatible?

 

nope, the membrane is polyimide(kapton)....does not work well with water/methanol

Alternatively, you they do make hobbs with ptfe(teflon) membrane...special order

OR

aquamist has switches that have a NBR membrane that is compatible with water/methanol.

Do you need a NO or NC switch?

 

http://content.honeywell.com/sensing...catswitch4.asp