HIOKI LR8431 Memory Hilogger


  • Record measurement data on a USB flash drive for easy transfer to a computer
  • Record to reliable Compact Flash cards during long-term measurement applications for increased peace of mind
  • Replace storage media during real-time recording
  • Improved thermocouple measurement accuracy and reference junction compensation accuracy
  • Ten isolated analog input channels
SKU: 6033

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HIOKI LR8431 Memory Hilogger

The HIOKI LR8431 Memory HiLogger is a state-of-the-art high-speed data logger designed to cater to a wide range of industries requiring precise and reliable data recording. This model is specifically engineered for recording multiple channels of voltage, temperature, pulse, or rotation signals, making it an essential tool for professionals in fields such as automotive testing, electronics manufacturing, and energy management.

Key Features of the HIOKI LR8431

The LR8431 boasts a robust set of features that enhance its functionality and reliability:

  • High-Speed Recording: The device logs data at impressive speeds of 10 milliseconds across 10 channels simultaneously. This capability ensures that rapid transient events are captured without data loss, making it ideal for applications where timing and precision are critical.
  • Isolation Between Channels: Each of the ten analog input channels is completely isolated, which prevents signal interference and ensures clean, accurate measurements even in environments with high electronic noise.
  • Bright Color LCD: The logger features a bright color LCD that provides crystal clear waveform displays, allowing users to monitor data in real-time and make immediate assessments.

Data Storage and Transfer Solutions

To accommodate various data handling needs, the LR8431 offers flexible storage solutions:

  • USB Flash Drive Compatibility:Users can record measurement data directly onto a USB flash drive, facilitating easy and quick data transfer to computers for further analysis.
  • Compact Flash Card Support: For long-term measurement applications, the logger supports recording to reliable Compact Flash cards, providing peace of mind with secure and robust data storage.
  • Real-Time Storage Media Replacement: The ability to replace storage media during real-time recording ensures continuous data logging, crucial for extended monitoring sessions without interruption.

Enhanced Measurement Accuracy

The LR8431 has been enhanced with improved features for temperature-sensitive measurements:

  • Thermocouple Measurement Accuracy:The logger offers increased accuracy in thermocouple measurements, critical for processes where temperature monitoring is essential.
  • Reference Junction Compensation Accuracy: Improved accuracy in reference junction compensation further enhances the reliability of temperature readings, ensuring data integrity and precision.

Versatility and Applications

The HIOKI LR8431 is incredibly versatile, suitable for a variety of applications where monitoring and recording precise data are crucial. Its capacity to handle multiple signal types and its high-speed, isolated channels make it particularly useful for dynamic testing environments. Automotive engineers can use it to test vehicle components under operational stresses, while energy technicians can monitor power systems for efficiency and safety.

HIOKI LR8431 MEMORY HiLOGGER Specifications:

  • Number of channels: Analog: 10 isolated channels using scanning input method (M3 mm dia. screw terminal block),Pulse: 4 channels (All pulse inputs share common ground with the main unit).
  • Measurement parameters:Voltage : ±100 mV to ±60 V, 1-5V f.s. 6 ranges, Max. resolution 5µV,Temperature (thermocouples) : -200 ˚C to 1800 ˚C (depend on the sensor), 1 range (K, J, E, T, N, R, S, B), Max. resolution 0.1 ˚C,Temperature (Pt 100 sensor) : cannot use,Humidity : cannot use,Totalized pulses : 0 to 1000M pulse, 1 range (No-voltage ‘a’ contact, open collector or voltage input), Max. resolution 1 pulse,Rotation count : 0 to 5000/n (r/s) f.s. 1 range (No-voltage ‘a’ contact, open collector or voltage input), Resolution 1/n (r/s) Note: n = pulses per,rotation (1 to 1,000).
  • Max. allowable input:DC 60 V (Analog input), DC -5 V to 10 V (Pulse input
  • Max. rated voltage to earth: AC 30 Vrms, DC 60 V (Upper limit voltage that does not cause damage when applied between input channel and chassis, and between each input channels).
  • Recording intervals:10 ms to 1 hour, 19 selections (All input channels are scanned within each recording interval.)
  • Selectable filters:50 Hz, 60 Hz, or OFF (digital filtering of high frequencies on analog channels).
  • Memory capacity:Internal storage: 3.5 M-words, External storage: CF card or USB memory stick (only the HIOKI CF card is guaranteed for correct operatio
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Hioki is a renowned Japanese brand known for its expertise in developing and manufacturing electrical measuring instruments. The company, Hioki E.E. Corporation, was established in 1935, and since then, it has committed itself to providing innovative solutions in the field of electrical measurement.

Hioki's product range is extensive, including devices such as digital multimeters, clamp meters, power meters, and oscilloscopes. These instruments are vital for various applications in research and development, maintenance, and production testing across industries like electronics, energy, and automotive. One of the key strengths of Hioki is its focus on precision and reliability, traits that are crucial in measurement instruments. Hioki’s products are designed to offer accuracy and durability, which make them preferred choices among professionals worldwide.

Moreover, Hioki emphasizes technological innovation and quality. The company invests significantly in research and development to keep up with evolving technological trends and to ensure their products meet the highest standards. This commitment to quality is reflected in their adherence to international certifications and standards. Hioki also values environmental sustainability, integrating eco-friendly practices in their operations and product designs. This includes efforts to reduce the environmental impact of their manufacturing processes and to design products that are energy efficient.

DATA sheet

Data Sheet


Technical Specifications

Feature Specification
Number of Channels Analog: 10 isolated channels using scanning input method (M3 mm dia. screw terminal block)
Pulse: 4 channels (All pulse inputs share common ground with the main unit)
Measurement Parameters Voltage: ±100 mV to ±60 V, 1-5V f.s. 6 ranges, Max. resolution 5µV
Temperature (thermocouples): -200˚C to 1800˚C (depend on the sensor), 1 range (K, J, E, T, N, R, S, B), Max. resolution 0.1˚C
Humidity: cannot use
Totalized pulses: 0 to 1000M pulse, 1 range, Max. resolution 1 pulse
Rotation count: 0 to 5000/n (r/s) f.s. 1 range, Resolution 1/n (r/s)
Max. Allowable Input DC 60 V (Analog input), DC -5 V to 10 V (Pulse input)
Max. Rated Voltage to Earth AC 30 Vrms, DC 60 V
Recording Intervals 10 ms to 1 hour, 19 selections
Selectable Filters 50 Hz, 60 Hz, or OFF
Memory Capacity Internal storage: 3.5 M-words, External storage: CF card or USB memory stick
External Interface USB 2.0 mini-B receptacle ×1
Display 4.3-inch WQVGA-TFT color LCD (480 × 272 dots)
Functions Save data to the CF card or USB memory stick in real time, Numerical Calculations, etc.
Power Supply AC adapter Z1005: 100 to 240 VAC (50/60 Hz)
Battery pack 9780: Continuous use 2.5 hours
12 V DC supply: 10 to 16 V
Dimensions and Mass 176 mm (6.93 in) W × 101 mm (3.98 in) H × 41 mm (1.61 in) D, 550 g (19.4 oz)
Included Accessories Measurement Guide ×1, CD-R (Instruction manual PDF, Logger Utility Instruction Manual PDF, Data acquisition application program Logger Utility) ×1, USB cable ×1, AC adapter Z1005 ×1