Can you trust an infrared reading on stainless steel?
Not on a bright mill or polished finish, where the surface emits little and reflects almost everything around it.
Read Article→Learning Center
Plain-language explanations of the measurements, sensors and numbers behind environmental monitoring.
Why reflected ambient temperature has to be entered too, not just emissivity
An infrared instrument sees emitted and reflected radiation mixed together, so emissivity alone cannot correct the reading.
Read Article→What a thermal camera does when you cannot change its emissivity setting
Explains the fixed value a camera without an emissivity control applies, quantifies the error that leaves on bare metal, and sets out what the instrument can still be trusted to do.
Read Article→Typical emissivity values for the surfaces you actually point a camera at
Gives published emissivity ranges for common building and electrical surfaces, shows which ones the usual 0.95 default handles and which ones it does not, and explains why solar modules are the hardest case.
Read Article→How to measure a shiny busbar with a strip of electrical tape
Sets out the matt tape target method for bare conductors, the dead panel step it depends on, and three ways to get the same answer without any emissivity assumption.
Read Article→Emissivity, and why a thermal camera reads polished metal far too cold
Explains emissivity as a ratio, works out what a busbar near 77 degrees Celsius displays at five different emissivity values, and shows why the error grows with the gap to the surroundings.
Read Article→How NETD and temperature range differ, and why one cannot stand in for the other
Separates the four specification families that get collapsed into the word accuracy, and shows why an instrument can resolve hundredths of a degree while being wrong by several degrees.
Read Article→What to do when a thermal camera listing never states its sensitivity
Shows what a genuine sensitivity figure looks like in a listing, which four other numbers get offered in its place, and why none of them can be converted into it.
Read Article→Why 40 mK finds a damp patch and 150 mK leaves it in the noise
A damp patch often sits only a few tenths of a kelvin below dry fabric, so the ratio of that difference to the camera noise floor decides whether it appears at all.
Read Article→Why NETD beats resolution on a building survey, and where it does not
On building fabric work thermal sensitivity decides whether a defect is visible at all, while resolution only decides how small a visible defect can be.
Read Article→What NETD means on a thermal camera, and when it matters more than resolution
NETD is the smallest temperature difference a thermal camera can separate from its own noise, quoted in millikelvin, and it decides whether a faint difference appears at all while resolution only decides how finely it is drawn.
Read Article→Does Ryobi make an inspection camera? What the badge changes and what it does not
Our product data holds no Ryobi inspection camera, so this page quotes no figures for one and instead sets out what a cordless tool platform changes about an inspection camera and what it leaves untouched.
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