Keysight 8483A Power Sensor, 100 kHz to 2 GHz, 75 ohm

The Agilent 8483A thermocouple power sensor is designed for use with the E4418B, E4419A, 70100A, E1416A and the 436A, 437B, 438A power meters, and provides extraordinary accuracy and stability. The 8483A power sensor gives you extremely low SWR, and is traceable to the U.S. National Institute of Standards and Technology (NIST). This sensor is the only 75 ohm impedance sensor in the 8480 series.