No more estimated results when measuring bright metals or varied surfaces. The CEM IR-77H is designed to give you accurate, precise data on every surface, which makes it an excellent value solution for quick checks at home and professional diagnostics in the field alike.
This is the critical feature that separates the CEM IR-77H from the "mini" thermometer class. Most economical models on the market have a fixed emissivity of 0.95, which makes them useful only for matt surfaces, organic materials, food and painted areas.
So what happens if you try to measure a bright stainless steel pipe or an aluminium engine block at a fixed 0.95? You get a completely wrong result with an enormous margin of error, because bright surfaces reflect heat like a mirror.
Emissivity adjustable digitally between 0.10 and 1.0 lets you set the instrument precisely for the material you are measuring — everything from a bright aluminium mould (around 0.15) to a matt wall (around 0.95) can be measured correctly. That is the mark of a professional diagnostic tool.
Professional tip: what is the easiest way to measure the temperature of a bright metal? Apply a patch of matt black paint to the surface, or stick on a heat-resistant matt tape such as electrical or masking tape. Set emissivity to 0.95 and measure the temperature of the tape — it will be the same as the surface temperature of the metal.
