Agilent 3458A 8.5 Digit Digital Multimeter

Industry-Leading Accuracy, Speed & Performance

The Agilent / Keysight 3458A is widely regarded as one of the most accurate and versatile digital multimeters ever produced. Designed for demanding applications in production testing, R&D laboratories, and calibration environments, the 3458A delivers exceptional measurement speed, precision, and long-term stability.

Capable of up to 100,000 readings per second, the 3458A dramatically improves test throughput while maintaining outstanding accuracy and resolution of up to 8.5 digits.

Whether used on the bench or integrated into automated systems, the 3458A provides reliable, repeatable measurements for even the most demanding applications.

Key Features

Exceptional Speed & Throughput

Up to 100,000 readings per second
Internal test setups greater than 340 per second
Programmable integration times from 500 ns to 1 second
Ideal for automated production testing and high-speed measurement systems

Outstanding Accuracy & Resolution

Up to 8.5 digits resolution
0.1 ppm DC voltage linearity
0.1 ppm DC voltage transfer accuracy
0.01 ppm RMS internal noise
Extremely stable voltage reference

Long-Term Reliability

Self-adjusting, self-verifying auto-calibration
Two-source calibration including AC
Designed for long-term stability and reduced downtime
Low cost of ownership

Front Panel Features

Easy-to-Use Controls

Direct access to DCV, ACV, resistance, current, frequency, and period measurements
Autoranging and manual ranging
Simple menu navigation keys

Flexible User Functions

Numeric keypad for fast parameter entry
User-defined setups via shifted function keys (F0–F9)

Premium Measurement Terminals

Gold-plated tellurium copper terminals for minimal thermal EMF
Supports 2-wire and 4-wire resistance measurements
DC/DC and AC/AC ratio inputs

Current Measurement Convenience

Easy-access fuse holder built into front terminal assembly

Enhanced Noise Rejection

Dedicated guard terminal and switch for superior common-mode noise rejection

Front / Rear Input Switching

Quickly select front or rear measurement terminals

Performance Specifications

DC Voltage Accuracy

0.6 ppm accuracy over 24 hours

Resistance Accuracy

2.2 ppm accuracy over 24 hours

AC Voltage Accuracy

100 ppm mid-band AC volts

Voltage Reference Stability

8 ppm/year standard
4 ppm/year optional

Advanced Digitizing & Waveform Capability

16 to 24-bit resolution
Sampling rates from 100,000 to 0.2 samples/sec
12 MHz bandwidth
Timing resolution to 10 ns
Less than 100 ps time jitter

Ideal Applications

Calibration Laboratories
Precision Electronics Testing
Aerospace & Defense
Semiconductor & Research Labs
Automated Test Systems (ATE)
Metrology Applications