Agilent/Keysight 8482B

The Agilent/Keysight 8482B is a thermocouple power sensor delivering precise average power measurements from 100 kHz to 4.2 GHz. It measures power levels from 1 mW to 25 W across dual dynamic ranges, with less than 1% power linearity and NIST-traceable calibration. This sensor is engineered for RF and microwave test environments where measurement accuracy and low SWR are critical.

Technical Specifications

• Frequency Range: 100 kHz to 4.2 GHz


• Power Measurement Range: 0 dBm to +44 dBm (1 mW to 25 W)

Low power path: −30 dBm to +20 dBm

High power path: +20 dBm to +44 dBm

• Impedance: 50 ohms


• Connector: Type-N male, precision connector with D-ring safety feature


• Sensing Element: Thermocouple


• Power Linearity: Less than 1% (±0.15%/°C temperature coefficient post-calibration)


• Calibration: NIST-traceable


• Dimensions: 4.5 in (H) × 3.3 in (W) × 11.14 in (L)


• Weight: 1.51 lbs

Key Features

• Low SWR minimizes mismatch uncertainty in high-impedance test setups


• Dual-path design optimizes accuracy across wide dynamic range


• High power configuration (25 W) integrates 30 dB attenuator assembly with sensor; attenuator and sensor must be used together for specified performance


• D-ring connector design prevents connection to high-power sources without required attenuator


• Suitable for communication systems, radar, and electronic warfare testing

Compatibility & Integration The 8482B interfaces with EPM, EPM-P, and P-Series power meters, legacy 435A/B, 436A, 437A, and 438A units, plus 70100A, E1416A VXI, and N1911A/N1912A/N1913A/N1914A instruments. When used with 8480 Series Power Meters, Option CFT enables SCPI compatibility. Incompatible meters: 43x, E1416A, N8262A, 5314x microwave counters, E7495x base station test sets. Note: High power attenuator may contain beryllium oxide. Do not generate dust; return defective units to Agilent for disposal.