Thanks, I do not see in the datasheet what medium they are designed for - somehow I am not quite sure they will be happy to have direct contact with water. Otherwise, I see them available for 16 EUR, which is fine. Probably I should just try one, since I can actually leave original switch attached in case if my design fails. On Thu, Jun 14, 2012 at 2:14 AM, Michael Klein wro= te: > Hello, > > I'd always found that the Motorola (apparently now marketed as Freescale > Semiconductor) sensor fit that bill quite well.. > > Check out the MPXV5050 ($13.64 each from Newark).. > http://www.newark.com/jsp/search/productdetail.jsp?SKU=3D75C3918&&CMP=3DA= FC-SF-T11 > > Many ranges and options to choose from. > Best regards, > > Mike --=20 KPL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .