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The industry's fastest direct digitizing multimeter at 5 mega-samples per second

Fluke Calibration's 8558A, ideal for system automation in labs and manufacturing test environments.


Accurate data, delivered amazingly fast

Shorter test time on the 8558A high-speed digital platform enables you to increase throughput, improve yield and realize a greater return on your investment. The 8558A digitizes to memory at 200 nanoseconds per reading and delivers 4.5 digit data to PC at 100,000 samples per second. Fast, high resolution data capture gives you the quantity and quality of information you need to make timely, correct decisions affecting system throughput and efficiency.

Debug and perfect your device under test

The 8558A features a 5 mega-sample digitizing rate with up to 20 MHz analog bandwidth, making it the first and only instrument on the market that can characterize extremely-low-level transient signals at 18-bit resolution. This capability makes it easier to debug designs, uncover anomalies and perfect your devices under test for use in real life environments.

Fast, reliable, and accurate compatibility

Inserting a new instrument into a tightly synchronized system can create overhead and incompatibility. The 8558A's digital platform includes common connectivity interfaces and precise triggering that lets it digitize, integrate and transfer data to anywhere in the system for analysis with minimal effort and the highest reliability. Compatibility with 488.2 and SCPI interfaces facilitates integration within an existing system enviromment with many other instruments.

Using another DMM in your automated testing workflow?

The 8558A provides full emulation of the Fluke 8508A Reference Multimeter and command compatibility of the Keysight 3458A Digital Multimeter via SCPI commands, making it an ideal replacement for these older instruments.

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Download the 8558A specifications

The 8558A 8.5-Digit Mulitimeter is available now from Fluke Calibration. Download the free full specs below.

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Technical specifications

DC voltage

  • 100 mV to 1000 V, (1050 V max)
  • 2.02x full scale
  • Maximum resolution: 1 nV
  • 4.0 μV/V (95 %), 5.2 μV/V (99 %), 1 year
  • 0.5 μV/V (95 %),, 0.65 μV/V (99 %), 24 hour stability
  • 0 ns to 10 s reading aperture

DC current

  • 10 uA to 30 A
  • 2.02x full scale
  • Maximum resolution: 1 pA
  • 9.0 μA/V (95 %), 12 μA/V (99 %), 1 year
  • 0 ns to 10 s reading aperture

AC voltage

  • 10 mV to 1000 V, 1 Hz to 10 MHz, (1050 Vrms max)
  • 2.02x full scale Vpp, 1.2x full scale rms
  • Maximum resolution: 1 nV
  • 80 μV/V (95 %), 103 μV/V (99 %), 1 year

AC current

  • 10 uA to 2 A (8558A)
  • 2.02x full scale Vpp, 1 Hz to 100 kHz 1.2x FS rms
  • Maximum resolution: 1 pA
  • 300 μA/V (95 %), 387 μA/V (99 %), 1 year


  • 1Ω to 10 GΩ (20 GΩ max)
  • 2.02x full scale
  • Maximum resolution: 10 nΩ
  • 10 μΩ/Ω (95 %), 13 μΩ/Ω (99 %), 1 year
  • Low current mode, high voltage mode and Tru Ohms™

Digitize V

  • 100 mV to 1000 V, (1050 V max)
  • 2.02x full scale
  • Maximum resolution: 18 bits
  • 5 mega-samples per second sample rate
  • Up to 20 MHz bandwidth

Digitize I

  • 10 μA to 2 A (8558A)
  • 2.02x full scale
  • Maximum resolution: 18 bits
  • 5 mega-samples per second sample rate
  • Up to 4 MHz bandwidth

Frequency or period

  • Voltage, up to 10 MHz
  • Current, up to 100 kHz
  • Frequency up to 100 MHz on BNC
  • 0.5 μHz/Hz, 1 year


  • PRT and thermocouple
  • 5 mK, 1 year

Reading speed

  • 1 reading /s at 8.5 digit into memory
  • 100,000 readings /s at 4.5 digit into memory
  • Up to 500,000 readings /s into volatile memory in digitize V and I
  • Up to 500,000 readings/s transfer through USB in binary format

Measurement memory

  • 15 million readings
  • 7.5 million readings with time stamp

GPIB, USBTMC, Ethernet

  • Native SCPI compliant remote commands
  • 8508A and 3458A emulation mode
  • Fully supports the MET/CAL™ calibration procedures library Fluke 8508A Reference Multimeter emulation
  • IVI Driver
  • USB thumb drive for convenient data transfer in .csv format

Trigger mechanisms

  • Manual trigger
  • External BNC Trig In and Trig Out
  • Internal or level trigger
  • Timer trigger
  • Epoch trigger
  • Line trigger
  • BUS trigger

CE and CSA Compliant

Ordering information



Optional accessories










8.5 Digit Multimeter


Rack Mount Kit (2U – 3.5 in)

Slide Rack Mount Kit

Transit Case

Comprehensive Measurement Lead Kit


  • 1x 8588A-LEAD KIT-OSP, General Purpose Probe Kit
  • 1x 1 m Screened 322/0.1 Copper (30 Amp Rating) with 6 mm Gold Plated Copper Spade Terminals
  • 4x 8588A-LEAD/THERMAL, 1.5 m Two Core Screened Low Thermal Cable with 6 mm Gold Plated Copper Spade Terminals
  • 2x Locking Adaptor 4 mm Binding Post to Safety

4-Way Shorting PCB

Low Thermal Lead Cable, 1.5 m Two Core Screened Low Thermal Cable with 6 mm Gold Plated Copper Spade Terminals

Cal Kit with 1 Gohm Standard and Connecting Leads

R&S Power Sensor

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