I use this infrared thermometer in my work:

It is indispensable when there is no possibility to install a sensor, when it is necessary to measure the temperature in hard-to-reach places. It easily measures the temperature of chips, liquids, rotating parts (bearings), wild animals :)
The laser is installed in the thermometer for accurate targeting:

')

The indicated divergence of the beam:

Battery compartment and switch from Celsius to Fahrenheit:

Flowing water, no problem:

Warm teapot:



CPU:

Wall of the house, distance ~ 3m.

Measures instantaneous temperature while maintaining maximum. When measured through glass, we obtain the temperature of the glass.
When you hover on the flame of a candle shows the temperature of the wick ~ 30
o .
According to the manufacturer, the accuracy is ± 1.5% of the reading.
The price of this model is about 3000r., There are domestic and cheaper! I hope someone will come in handy.
UPD
Discussion of the temperature of the flame
habrahabr.ru/blogs/hardware/85797/#comment_2562549 requires a physicist.