Turnigy Infrared Thermometer (-33 ~ 180Celsius) Turnigy Infrared Thermometer (-33 ~ 180Celsius)
This is a perfect tool.

It works very good, and the accuracy is not so bad.
The best accuracy is at an distance of about 2-4 cm.
Easily change off temperature unit.
Once you press the button, it keeps measuring.
This tool is really small.