Keysight 34420A Nano-Volt / Micro-Ohm Meter

Keysight 34420A is a high-sensitivity multimeter with 7.5-digit resolution designed for precise low-level voltage and resistance measurements. It combines low-noise voltage measurement circuits with resistance and temperature measurement functions, setting a new standard for flexibility and performance in small-signal measurements.

Main Specifications:

• Resolution: 7.5 digits
• Sensitivity: 100 pV for DC voltage and 100 nΩ for resistance
• Noise Characteristics: 1.3 nV RMS, 8 nV peak-to-peak
• Built-in low-noise 2-channel scanner: simplifies voltage comparisons
• Temperature Measurement: accuracy of 0.003 °C with standard platinum resistance thermometers (SPRT)

Features:

• Dual Input Channels: enable automated dual-channel measurements without the need for an external nanovolt scanner. Both channels offer identical low-noise performance for precise comparisons.
• Built-in resistance and temperature measurement functions: a highly stable current source provides accurate low-level resistance measurements without requiring an external current source.
• Resistance Measurement Modes: standard, low-power, and voltage-limited modes for dry circuit testing.
• Offset Compensation: minimizes thermoelectric EMF and related errors.
• Support for various temperature sensor types: SPRT, RTD, thermistors, and thermocouples.

Applications:

34420A is suitable for use in laboratory and production environments where precise low-level voltage, resistance, and temperature measurements are required. Its capabilities make it an ideal choice for applications demanding high sensitivity and accuracy.