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The N8481B from Keysight Technologies is a Power Sensor with Frequency 10 MHz to 18 GHz, Power Range -5 dBm (0.316 mW) to +44 dBm (25W). Tags: Thermocouple Power Sensor. More details for N8481B can be seen below.
TVAC compliant USB and LAN Power Sensor
10 MHz to 8 GHz Three-path Diode Power Sensors
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