The 8480 series power sensors are designed for use with the 435B, 436A, 437B, 438A, 70100A, E1416A and now the E4418B and E4419B power meters. These thermocouple and diode power sensors provide extraordinary accuracy, stability, and SWR over a wide range of frequencies (100 kHz to 110 GHz) and power levels -70 dBm to +44 dBm).
Mismatch uncertainty is usually the largest single source of error in power measurements. The HP 8480 power sensor family gives you extremely low SWR even at mm-wave frequencies. Each power sensor in the HP 8480 family is individually calibrated and shipped with Cal Factor v Freq data.
HP high-sensitivity diode power sensors (HP 8481D/5D/6D/7D) are always operated inside the square-law region. This means that the sensor will act as a true-RMS reading device over its entire -70 to -20 dBm dynamic range. The benefit to you: HP sensors provide you with accurate readings even if your test signal is subjected to multitone environments, modulated carriers, or carriers with high harmonics.