The Keysight N8487A Power Sensor is the replacement for 8487A 50 GHz Power Sensor. It differs from the 8487A by integrating an EEPROM that allows users to calibrate the power sensors without manual entry or referencing a cal chart on the body of the sensor. It also has wider dynamic range, better accuracy, linearity, repeatability, and SWR.
Agilent / Keysight N8487A