Alfano Tyre Gauge
Alfano make one of the best tyre gauges around. You will see most of the Aussie V8 teams using these gauges.
You can program to record you starting pressures (cold) and your running pressures (hot), the gauge will then show you what the increase in pressure was. This way you can get your pressures 100% correct for the race.
The gauge can be set for PSI or Bar.
The Temp Prob can be set in C or F.
You can re-calibrate the gauge, after a flight, on a hot day and the air changes.
I personal have had my Alfano Tyre Gauge since 2010, I bought a new one as I thought I should replace it. I back-to-backed them and my original gauge still read the same as a new one!