This might help.

The tube is .200 inch I.D. 316 stainless. The ss tube is press fit into a drilled out bulkhead water fitting. Both from Mcmaster Carr.

The sensor is an LM34, 10 mv/deg F output. Spec sheet at national semiconductor.

The sensor is sealed in the tube with Locktite epoxy putty from Lowes



www.mikecramer.com/images/probe1.jpg



www.mikecramer.com/images/probe2.jpg