The U8481A Option 200 from Keysight Technologies is a Power Sensor with Frequency DC to 18 GHz, Power Range -35 to 20 dBm, Dynamic Range 55 dB, Operating Temperature 0 to 55 Degree C, Storage Temperature -40 to 71 Degree C. Tags: Thermocouple. More details for U8481A Option 200 can be seen below.