True infrared traceability and a six-inch target make these the most accurate and versatile gray bodies on the market.

The Hart 4180 series Precision Infrared Calibrators achieve the highest accuracy of any portable infrared calibrator over a wide enough temperature range, and with a large enough target to calibrate more IR thermometers with a 4:1 test uncertainty ratio (TUR) than any other calibrator on the market.

With such features as traceable radiometric calibrations,
large target size, emissivity adjustment, and proprietary firmware, these calibrators make even expert-level accuracies more easily attainable.
In fact, they make other calibrators obsolete. These precision calibrators are fast, portable, and dependable too.

Model 4180 has a temperature range from –15 °C to 120 °C, with display accuracy as good as ± 0.25 °C.

Hart Scientific is now Fluke Calibration.