http://www.ebay.com.au/itm/400985289722

 
Has anyone had any experience with one of these gadgets.  It apparently can measure tyre temperatures too.
Hard to imagine it could read the actual tread temperature.

Hi Kojab,
Just an observation.
It appears to only display 2 digits, 2.5 bar = 250 kPa = 36.28 PSI.
However it may also display 2 digits of PSI. e.g. 35, 36, 37 PSI.
I guess most people don't think of tyre pressure more accurately than a tolerance of 1 PSI, so only displaying to 0.1 bar = 10 kPa isn't a lot coarser than that.