[Mike AA]

The probes we are using will likely be the style used in outdoor remote thermometers which have long leads to tie into.

Billbo, that would work in air just fine but we will be forcing these sensors into a silt soil. The plan was to attach them to the side of a pipe/tube that we could press into the ground the conductors would run within the pipe but the sensors would be on stand-offs on the side of the pipe. The sensors need to be in direct contact with the soil, or as best as we can get.

The purpose of the logging is that we dont have to monitor 24/7 and the guy who is doing the monitoring doesnt have the time (or patience unfortunately) to frequently check the equipment. We are measuring 21 sensors 24hrs a day and approximately 150days.