Keysight 34401A Digital Multimeter

Keysight 34401A Digital Multimeter – Legendary 6½ Digit Bench DMM

The Keysight 34401A Digital Multimeter delivers 6½ digit resolution for precise and stable measurements in laboratory, production, and system applications. It supports 10 essential measurement functions, including DC and AC voltage, DC and AC current, 2- and 4-wire resistance, diode test, continuity, frequency, and period.

With a basic accuracy of 0.0035% for DC and 0.06% for AC, the 34401A ensures reliable measurement performance across a wide range of test conditions. The instrument allows input levels up to 1000 V maximum voltage and 3 A maximum current, making it suitable for general-purpose electronics testing as well as power-related measurements.

Measurement Capability

• 6½ digit resolution

• 10 measurement functions:
  DC/AC voltage, DC/AC current, 2- and 4-wire resistance, diode, continuity, frequency, and period

• Basic accuracy:

  • DC: 0.0035%

  • AC: 0.06%

• Maximum input voltage: 1000 V

• Maximum input current: 3 A

This makes the 34401A ideal for component testing, calibration tasks, and high-accuracy electrical measurements in quality-critical applications.

System & Automation Performance

• Measurement speed up to 1000 readings/second

• 512-reading internal memory

• Compatible with BenchVue Basic software for remote control and data logging

• SCPI command support for seamless integration into automated test systems

Product Status & Migration Path

• The Keysight 34401A was discontinued on December 1, 2016

• Replaced by the next-generation Keysight 34461A Truevolt Series DMM

• Keysight continues to provide standard product support for 5 years

• The 34461A is a 100% drop-in replacement, fully SCPI-compatible with the 34401A, while offering:

  • Graphical color display

  • Truevolt measurement technology

  • LAN, USB, and GPIB connectivity

Important Notice

Counterfeit versions of this product have been identified in the market. To ensure genuine Keysight quality, performance, and reliability, purchase only from Keysight-authorized distribution partners.