Distance Spot Ratio of Infrared thermometers.

[Kiriakos GR]

I made some new friends in the industry of Infrared thermometers. 

And in their Users manual there is a nice picture that demonstrates in detail the specifications regarding Distance Spot Ratio of the advanced technologically Infrared thermometers.

   

[Kiriakos GR]

It does not require much of imagination that the suggested Distance Spot Ratio of what an electrician needs to have so to aim on a circuit board or electrical panel needs to be 50:1.

The benefits of 50:1 are very specific.
a)  You can get one very accurate reading by the distance of 70-80cm away ( That is a safe distance regarding high voltage)

b)  You can have an accurate reading even up to two meters ( extremely high temperature sources )

c)  The diameter of the beam is 16mm = 1.6cm  that is almost good enough for aiming circuitry breakers.

In such Infrared thermometers of 50:1 and with one so narrow in diameter beam, those dual pointing lasers is a must have too as aiming assistance.

All the above details they do present clearly the profile which one successfully designed 50:1 Infrared thermometer must have.

What I would describe as even higher in quality Infrared thermometer in the 50:1 Distance Spot Ratio,
it would be the one with even narrower diameter of beam at less than 16mm.