Product overview: Fluke Calibration 4180/4181 Precision IR Calibrators The 4180 Series of Precision InfraredCalibrators for infrared thermometers and thermal imagers is fast, accurate, and easy to use
Many radiometers require the use of an aperture to reduce the effect of scatter. This is a simple-to-use, 2-inch non-water cooled aperture designed for use with the 4180 or 4181 Precision Infrared Calibrators.
