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.
