Is this for a bit of DIY use, or for your work?I basically want to be able to detect cold spots on walls and windows.
No, these devices detect and measure infrared energy and estimate the apparent surface temperature of the object.In any case, these devices measure emissivity, not temperature
Yes, the recorded temperature is effected by the surface - and this is the emissivity.this is affected by the surface material, colour and texture.
Are we spitting helical strips of keratin?No, these devices detect and measure infrared energy and estimate the apparent surface temperature of the object
No, not splitting hairs.Are we spitting helical strips of keratin?
Emissivity is the ability of the surface material to give off the energy (IR), and that is why surfaces of different materials with different emissivity will (without interpretation) show different temperature readings even if the different materials are actually at the same temperature.No, not splitting hairs.
Emmisivity is the ratio of the energy radiated from a surface, compared to that of a blackbody.
A concrete block has an emmisivity of around 90%. When we heat the block up, its emmisity won't change, but it's temperature will.
The IR camera is not measuring the objects emmisivity.
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