If you feel creative, you could try to build your own temperature probe using Arduino + LM35 sensor + stainless steel tube + some solder.

The datata sheet claims, it can read temperature between -55°C - 150°C, but I never tested its limit so I have now idea how far you can actually push it :)

In any case, like HeyLaughingBoy have said, if you want something which goes higher, check thermocouples.

The probe is good up to 425F