The Agilent/Keysight 4338A is a precision milliohmmeter for low-resistance measurements in component and circuit characterization. It delivers fast, accurate AC resistance analysis across a wide dynamic range, making it suitable for quality assurance, failure analysis, and production testing environments. The instrument measures resistance, reactance, inductance, impedance, and phase angle with high resolution and speed.
– Technical Specifications
• Measurement Range: 10 µohms to 100 kohms
• Resolution: 10 µohms
• Test Current Levels: 1 µA to 10 mA
• AC Measurement Frequency: 1 kHz
• Measurement Speed: 34 ms
• Display: 24-digit LCD
– Key Features
• Measures R (AC resistance), X (reactance), L (inductance), Z (impedance), and phase
• Built-in comparator for rapid pass/fail determination
• Auto-measurement mode for unattended testing
• Fast measurement cycle supports high-volume production workflows
– Typical Applications
• Low-resistance component verification
• Coil and inductor characterization
• PCB trace and interconnect testing
• Quality control in manufacturing
• Failure analysis and root-cause investigation
– Compatibility & Integration
The 4338A Milliohmmeter operates as a standalone instrument. Related accessory products in the Keysight portfolio include the N4338A NanoVTEP Sensor Plate, designed for in-circuit test systems requiring specialized tantalum chip measurement geometries.
Note: The 4338A is an obsolete product no longer sold by Keysight. Existing units may remain in service within legacy test environments.
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