Anritsu MA2425B Fast Thermal Sensor, 10MHz to 50GHz

The Anritsu MA2425B is a broadband thermal power sensor engineered for rapid, accurate RF power measurements spanning 10 MHz to 50 GHz. Using Seebeck element technology with true-RMS detection, it delivers settled power readings up to 10 times faster than conventional thermal sensors - with rise and fall times below 4 ms each. This speed advantage directly reduces test cycle time in production and field environments.

Technical Specifications

-# Frequency and Power

• Frequency Range: 10 MHz to 50 GHz


• Dynamic Range: 50 dB


• Measurement Principle: Thermal power sensing with true-RMS detection


• Rise Time: < 4 ms


• Fall Time: < 4 ms -# Connectors and Physical Interface


• RF Connector: V(m) type (1.85 mm) -# Calibration

Internal EEPROMs store frequency-dependent, power-dependent, and temperature-dependent calibration coefficients. The connected power meter automatically interpolates and applies corrections during measurement, eliminating the need for manual calibration adjustments across the frequency and power range.

Key Features

• Thermal detection enables accurate average power measurement of any signal modulation type


• 50 dB dynamic range supports both high-power and low-level signal characterization


• Sensor-resident calibration data eliminates external calibration references


• Sub-4 ms response time accelerates measurement throughput in high-volume test applications


• Compact form factor with V-type RF connector for direct integration into test benches

Typical Applications

• Broadband RF power measurement and validation


• Power amplifier characterization and efficiency testing


• Transmitter output power verification across microwave and millimeter-wave bands


• Automated test systems requiring fast thermal power sensing

Compatibility & Integration The MA2425B integrates with the Anritsu ML2430A Series Power Meters, which interpret the sensor's stored calibration data and execute real-time measurement correction and interpolation.