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What does Sensitivity (NETD) mean when applied to a Thermal Imager?
05-24-2012, 01:17 PM (This post was last modified: 06-19-2012 12:32 PM by Gary Orlove.)
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ITC What does Sensitivity (NETD) mean when applied to a Thermal Imager?
Sensitivity expresses the ability of an infrared camera to display a very good image even if the thermal contrast in a scene is low. Put another way, a camera with good sensitivity can distinguish objects in a scene that have very little temperature difference between them.

Sensitivity is most often measured by a parameter called Noise Equivalent Temperature Difference or NETD, for example, NETD @ 30 C : 80mK. A Kelvin degree is the SI base unit of thermodynamic temperature equal in magnitude to a degree Celsius, so mK means thousandths of a degree (80mK = 0.080 K).
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