Thermometers?

[Mik]

Can’t get it there.

https://www.thermoworks.com/thermapen-one/

[Doctor Phibes]

If you're getting really concerned about accuracy I'd be tempted to experiment with a thermocouple reader - that way the sensors (thermocouples) are really cheap to replace, the expensive bit would be the reader, which is going to last for ages. The trick is you can then keep the electronics well away from the heat, which is going to improve longevity.