CEM BX-500 Portable IR Calibrator is used for calibrating long-distance Infrared Thermometers, which is designed as handheld and small calibrations. Whether you’re using in-line or handheld infrared pyrometers, you need a high-performance calibration standard to verify accuracy. Portable IR Calibrator provides a stable black body target for calibrating non-contact IR thermometers up to 500°C.