An infrared thermometer measures temperatures without touching the object. And these smart things now fall within our hobby budget.
They are extremely user-friendly and you can use them to measure and compare the temperature of exhaust bends and brakes, to locate hotspots in wiring, to measure your cooling water temperature, to simply hang your professional board on your tool board. And those are just some automotive things.
Because what do you think about measuring the temperature of your house walls in the coming winter? Then you can check whether there are heat leaks there due to lack of insulation ...
Consider prices between the 30-70 euros