The Model 385 is a non-contact infrared thermometer calibrator which has the special designed concentric circles wavy surface that provides the excellent result of emissive. This model has the broad range of 50 to 500°C. Moreover; it has ability to provide a steady, repeatable calibration point which allows the user to calibrate or test most infrared pyrometers quickly and accurately. The target plate has a known emissive enabling the user to calibrate virtually with any infrared pyrometer with a spot size diameter of 110 mm . All models have an optional communications interface for computer formats to choose from; external control and record temperature set temperature.