"R.P.McMurphy" wrote in message
...
Hi all, I need to heat a steel rod 12inches long and half and inch in
diameter up to around 40 degrees centigrade and keep it within 2degrees.
It will need to be kept constantly at this temperature. it can only be
heated at one end, the other end needs to be un cluttered.

Any suggestions how I can do this?

Get an electronic aquarium heater/stat and set it to 40C in a gallon or two
of water.
Put the end of the bar in it..
wrap the rest in a couple of inches of insulation..
job done..
or is it?

You don't actually supply enough info to be sure what can be done or even if
its possible.