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EOI's differential temperature sources provide precise, adjustable thermal between a target and the background. The contrast patterns are primarily used in testing and characterization of IR imaging systems. As the performance of thermal imagers has improved, EOI has met the testing requirements for ever more precise instruments. The CDS series provides thermal contrasts which are stable to ±0.003 °C. The award winning LDS series takes you to the next level of performance with ±0.001 °C stability.

Model Differential
Temperature Range
Usable Target
Area Range (square)
  CDS100  –25 to +75 °C 1.8" to 24"
  CDS200  –25 to +175 °C 1.8" to 14"
  LDS100 –20 to +70 °C 1.8" to 12"
  Test Targets
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