The Berkeley Nucleonics Model 12100 Series plug-and-play USB power sensors measure true-RMS average power for radar, satellite, telecommunications and automated test from 9 kHz to 67 GHz, with a WR-15 waveguide model reaching 75 GHz. Coaxial models span −60 to +26 dBm. Patented thermal stability eliminates zeroing and pre-use calibration. SCPI control runs over USBTMC, USB HID or optional SPI/I²C. Options add unattended logging to 50 million measurements, write-lock security (MIL) or secure erase (SEC).