Perhaps the most useful diagnostic tool in your toolbox. We've used one of these for years whenever we've had engine cooling or combustion problems.
Just point it at each manifold branch at engine start up to see if they're all the same temperature.
Or aim it at your hoses and radiator to see exactly how your cooling system is performing.
Change from Centigrade to Fahrenheit with the push of a button. Another button switches on the display Backlight and another switches on a Laser Pointer that shows you exactly the point of measurement.
Measuring range –20ºC and 200ºC. Takes a PP3 9 Volt battery (Not included.)
INFRARED THERMOMETER #INFRA