cwl
1. Mounted next to the track for a week or so at a time.
2. No power, it'll have to have batteries.
3. Other info: time.
It would be handy to be able to measure the passage of trains (in case
temperature suddenly increases when a train passes, then gradually
dissipates), but I'm not sure how easy/difficult that would be.

The logger would have to be small enough to be used in tunnels.

tia

John

wrote:
A few questions:

1) Are you measuring the temperature of one bit of track or are
attaching the logger to a train and measuring the temperature of the
track on it's journey
2) Do you have a power supply available
3) Do you want to record any other information (time, passage of
trains, etc.)