Resources/CAMCUDA Wiki/NETD
Image quality

NETD

Noise-equivalent temperature difference

CAMCUDA WIKIUpdated 29 October 20262 min read

A measure of thermal sensitivity, usually expressed in millikelvins.

What it means

NETD characterises how small a scene-temperature difference a thermal camera can distinguish relative to its noise. A smaller value generally indicates better sensitivity under equivalent test conditions.

NETD is not absolute temperature accuracy. Compare the test temperature, lens F-number, frame rate and other stated conditions alongside the number.

In practice

Integration note

Do not read a 40 mK NETD specification as a promise of ±0.04 °C measurement accuracy.

F-numberRadiometryCalibration

Related product resources

SuperMini-640 ↗Ultra-light core640 × 512 · 8 µmAirTiny2 ↗13 mm core256 × 192 · 12 µm · ≤25 Hz

Continue with an Engineering Guide ↗

Sources & further reading

  1. SuperMini 640 Product Specifications V1.0.0.pdf
  2. SuperMini 640T Product Specifications V1.0.0.pdf
  3. AirTiny2 Product Specifications V1.0.0.pdf
  4. FLIR: Noise Equivalent Temperature Difference

Concept explanations are general. Use the matching product, lens, interface board and firmware documentation for the delivered configuration.

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