The Agilent 8481B lets you measure average RF power from 10 MHz to 18 GHz at levels up to +44 dBm, making a single probe sufficient for kW radar drivers, high-power amplifiers and Ku-band links. Its thermocouple architecture delivers true-RMS readings on any modulation without range-switch glitches, while the built-in Type-N attenuator chain and excellent SWR keep mismatch uncertainty low. EEPROM-less operation still plugs straight into modern Keysight EPM, EPM-P and P-Series meters as well as legacy 43x frames, preserving existing test code and accessories. Refurbished units ship ISO-17025-calibrated, providing Keysight accuracy, 25-W headroom and long-term serviceability at a fraction of new-sensor cost.

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Interested in an Agilent 8481B or a similar model?

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Looking for other models? Our inventory changes daily—ask for the latest list of spectrum analyzers and RF equipment.

Why Choose TESTRO?

1. Laboratory-Verified Performance

   Every unit ships with an ISO/IEC 17025 calibration certificate bearing the TESTRO Certified seal, so you know the specifications are not just claimed—they’re proven.

2. Total Transparency

   High-resolution teardown photos and a live video test session let you inspect seals, modules, and real-time performance metrics before you pay.

3. Real Warranty, Real People

   One-year machine warranty, with our engineering team standing by on business days to provide remote assistance for any software or hardware issues.

4. Global Delivery, Built-In Protection

   DHL lanes—arriving at most destinations in just 3–5 days.

5. Flexible, Modern Payments

   Choose traditional T/T or wire transfer, credit card.

6. Open-Door Assurance

   Visit our Shenzhen facility, walk the refurbishment line, and see your equipment on the bench before it leaves our dock.

Founded in 2017 and headquartered in Shenzhen, TESTRO Electronics LLC focuses on the secondary sale and flexible rental of high-end electronic test instruments. The team counts 30 employees and operates a 1,500 m² warehouse and inspection center in Qianhai, Shenzhen.

Industry Background & Resource Sourcing

Over the past two decades, rapid advances in China’s radio-frequency sector have shortened production-line refresh cycles to roughly 3–5 years. Leveraging long-term partnerships with equipment OEMs, research institutes, and calibration labs, TESTRO acquires traceable, well-maintained decommissioned or replacement units. Every instrument undergoes a five-step technical check and third-party calibration before entering stock, ensuring reliable performance data.

Core Services & Delivery Process