DESCRIPTION:
The Bird Technologies 4028A4M Directional Power Sensor is a high-power RF measurement sensor engineered to provide accurate directional forward and reflected power readings over a frequency range of 3.5 MHz to 4.5 MHz. Part of Bird’s 4028 Series Precision RF Directional Thruline Power Sensors, it delivers ±2 % accuracy at calibrated frequency and power levels and ±3 % outside calibration when used with compatible multifunction power meters such as the Bird 4421A Series. Calibration is traceable to the National Institute of Standards and Technology (NIST), ensuring measurement integrity and reproducibility.
Designed for demanding RF environments — including semiconductor processing, industrial RF systems, and high-power communications — the 4028A4M provides stable, repeatable measurements with low insertion loss and strong directivity. Typical power handling for this model is in the range of 1.0 kW to 25 kW, making it well suited for high-power RF monitoring and diagnostics where precise forward and reflected power data at low HF frequencies is essential. Connector configurations must be specified at the time of ordering for the published accuracy to apply to the installed connectors.
Typical Use Suitability:
Ideal for high-power RF measurement and diagnostics in engineering labs, production floors, and industrial RF environments — particularly where accurate forward and reflected power data at low HF frequencies is required.
Key Features
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Frequency range of 3.5 MHz to 4.5 MHz for low HF RF systems
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High power coverage: typically 1.0 kW to 25 kW with appropriate connectors
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±2 % accuracy at calibrated frequency and power levels (±3 % outside calibration)
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Directional measurement of forward and reflected power
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Low insertion loss supportive of precision measurement
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Strong directivity for improved forward/reflected separation
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Calibration traceable to NIST for confidence in measurement integrity
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Compatible with Bird 4421A Series multifunction power meters and similar platforms