The HP/Agilent 8181A is a precision thermocouple power sensor for RF and microwave measurements from 10 MHz to 18 GHz. Operating across a -30 dBm to +20 dBm range, it delivers the accuracy required for component characterization, power meter calibration, and production testing. The sensor’s 50 Ω Type N male connector (Option 001 available with APC-7) integrates directly with established Agilent and HP power meter platforms. Its thermocouple sensing element achieves measurement noise below 110 nW and zero drift under ±10 nW, supporting demanding metrology workflows.
Technical Specifications
• Power range: -30 dBm to +20 dBm
• Frequency range: 10 MHz to 18 GHz
• Maximum average power: 300 mW
• Maximum peak power: 15 W
• Maximum energy per pulse: 30 W·µs
• Impedance: 50 Ω
• Sensing element: Thermocouple
• Measurement noise: < 110 nW
• Zero drift: < ±10 nW
• Connector: Type N male (50 Ω)
– Key Features
• Thermocouple-based measurement for stable, drift-free performance
• Excellent SWR characteristics minimize mismatch uncertainty
• Compact form factor: 38 mm wide × 30 mm high × 105 mm long
• Calibration factor provided on sensor label for frequency-specific accuracy
• One-year calibration cycle recommended
• Operating environment: 0 to +55 °C, < 95% relative humidity, < 4,572 m altitude
– Typical Applications
• RF/microwave power measurement in development and production
• Power meter calibration and verification
• Component and subsystem characterization
• Pulse and CW power analysis
– Compatibility & Integration
The 8181A mates with EPM Series, EPM-P Series, P-series, 43X series, and legacy 435B, 436A, 437B, 438A power meters, plus E1416A VXI and 70100A instruments. Supplied with calibration documentation (Part No. 08481-90049).
