Data Logger to Prevent Fungal Occurrence in Business Critical Locations

Hioki Memory HiLoggers are high-speed data loggers for recording multiple channels of voltage, temperature, resistance or humidity signals, some models providing complete isolation between channels and strong noise resistance. The Hioki LR8520 is a wireless and compact 1ch logger that records fungal index and growth prediction to easily prevent fungal growth. The logger utilizes Bluetooth® technology to either send measured data to the Hioki LR8410 Wireless Logging Station or to an Android (TM) tablet. Data can be downloaded using Hioki’s tablet and smartphone app (for Android devices). Search for “HIOKI” and download the Wireless Logger Collector! Key Features • High-precision ±3% rh humidity sensors • Calculate and display fungal index*1 and growth prediction • Measure temperature and humidity other than fungal index and growth prediction • Compact 1ch logger (Temperature/Humidity each 1 ch input) • Download measurement data to a tablet or computer with Bluetooth® wireless technology or capture in real time with the LR8410 • Three-way power (AC adapter, AA alkaline batteries, or external 5 to 13.5 V power supply) • Store 500,000 data points per channel

Model No. (Order Code)

LR8520 Humidity sensor is sold separately

*1 Fungal index was proposed by Keiko Abe, Doctor of Agriculture and Director of the Institute of Environmental Biology (Japanese Patent Number 2710903). The LR8520 alone is not capable of making measurements - please also purchase applicable sensor. Only the temperature and humidity sensors affect the measurement accuracy and are subject to calibration. The LR8520 logger does not require calibration. For the latest information about countries and regions where wireless operation is currently supported, please visit the Hioki website. Bluetooth® is a trademark of Bluetooth SIG, Inc. and licensed for use by HIOKI E.E. CORPORATION.

Main unit only

Get it on Google Play

QR Code link to Hioki’s Android app*

Scan this QR Code with an Android device to access the Google Play download page directly *QR Code is a registered trademark of Denso Wave Incorporated.

A compact 1-channel wireless logger that can predict the ease with which fungus grows

Temperature, Humidity, Fungal index, Growth prediction ● Fungal index - Calculated based on temperature and relative humidity - This index predicts how easy it is for fungi to grow. The fungal index is indicated by a value from 0 to 200, and can be used to predict the period of time until the start of fungal growth and contamination. ● Growth Prediction - Calculated based on the fungal index - Since fungal growth occurs when the necessary environmental conditions are maintained over a certain period of time, the cumulative value estimated from the fungal index can be used to predict fungal contamination. The Hioki LR8520 uses illustrations to indicate fungal growth in 5 stages based on the accumulative value. Easily Predict Fungal Growth Based on 2 Indices

Application: Food and Grain Storage

Issue Grain is traded in terms of weight, but its quality is maintained by keeping the grain as dry, and therefore as light, as possible. On the other hand, increased humidity brings about the risk of fungal contamination. If fungal contamination is discovered, the entire volume of product must be destroyed. << Resolved with WIRELESS FUNGAL LOGGER >> You can easily check if environmental conditions promote fungal growth in order estimate how high the humidity can be safely raised.

Application: Buildings

Issue Since buildings have a high degree of air tightness, fungal growth occurs easily in any season. In the summer, fungal growth occurs easily in areas subject to cool air from air conditioning units. Air conditioning is set to excessively control temperature and humidity in an attempt to prevent fungal growth. << Resolved with WIRELESS FUNGAL LOGGER >> Easily identify the range in which fungal growth occurs in order to moderate air conditioner settings and conserve energy.

A wireless logger whose data can be captured by a smartphone or PC

Built-in Bluetooth(R) wireless technology. Use your tablet or PC to collect data even as signals are being logged. No matter what time during measurement you collect the data, data is automatically merged together into one single file. Review data trends by observing waveforms and numerical values right there in the field. *Pictured: LR8514

Real-time monitoring

By using the Hioki LR8410-20 to acquire data, you can view the waveforms in real time. Furthermore, previous waveforms can be viewed while the device is taking measurements. *Pictured: LR8514

A compact wireless logger that you can place anywhere

Pocket size for installation anywhere. Resolves issues involving installation space. Wireless capability is useful when you need to collect data from high places or locations scattered across a large site.

Power with AA batteries or an AC adapter

The logger will operate for about 20 days on two AA-size alkaline batteries. (Recording interval: 1 sec, with Bluetooth(R) ON) Since the batteries will last longer the less time the Bluetooth(R) function is operating, the instrument features a power-saving function that automatically turns on the Bluetooth(R) circuit during predefined time periods. While communications are disabled, data is reliably stored in the instrument’s large built-in memory, which can hold 500,000 data points per channel. Use the AC adapter to record data over extended periods of time with peace of mind.

A temperature and humidity logger that can generate alarms

Using the built-in alarm function, if measured signals fall outside defined ranges,"ALARM" can be displayed. You can also connect the logger to an external buzzer or warning indicator lamp. (The buzzer and warning indicator lamp must be prepared separately.) You can also use the LR8520 as a 1-channel temperature and humidity logger that can generate alarms.

Basic specifications

Functionality[Used as standalone product (Data collected manually) ]
Windows PC or Windows tablet (CD-R with software included)
Android smartphone or Android tablet terminal
(Download app from Google Play)
*Communication range varies with the performance of the computer or tablet
(up to a line-of-sight distance of roughly 30 m)
[Used as an input module (Real-time measurement) ]
Device can be used as an LR8410 logging module to record and display data in real time and to control up to 7 units, Communication distance: 30 m
Number of channels1 temperature channel + 1 humidity channel (Humidity sensor Z2010 or Z2011 is required (sold separately))
Display itemsTemperature, humidity, fungal index (0 to 200), growth prediction (5 levels)
Measurable range[Temperature] -40˚C to 80˚C, Range 100˚C f.s., Max. resolution 0.1˚C
[Humidity] 0% to 100% RH, Range 100% RH f.s., Max. resolution 0.1% RH
Measurement accuracy (using Z2010/Z2011)[Temperature] ±0.5 ˚C (10˚C to 60˚C), If outside above temperature range: Add 0.015 ˚C/ ˚C (-40 ˚C to 10 ˚C) or 0.02˚ C/ ˚C (60 ˚C to 80 ˚C)
[Humidity] ±3% RH (20˚C to 30 ˚C, 20% to 90% RH), Hysteresis: ±1% RH (Added to the humidity measurement accuracy)
Other functionsMeasurement value, Date, Time, Number of recorded data, Maximum value, Minimum value, Average value, Alarm, Scaling, Recording operation hold function, Erroneous operation prevention, Comment recording function, Power saving function, Authentication function, Free run
Recording[Capacity] 500,000 data items for each channel [Mode] Instantaneous value [Interval] 0.5 sec to 30 sec, 1 min to 60 min, 14 selections
Power supplyACAdapter Z2003 (100 to 240 V AC, 50 /60 Hz), AA alkaline batteries (LR6) × 2, External power 5 to 13.5 V DC (can also be supplied from USB bus power via a conversion cable)
Continuous operating time ([Capacity] 500,000 data items for each channel) (23˚C) 3.5 months (Recording interval of 1 min, Bluetooth® OFF), 20 days (Recording interval of 1 sec, Bluetooth® ON), 5 days (Recording interval of 0.5 sec, during real-time measurement with the LR8410)
Dimensions and mass85 mm (3.35 in) W × 61 mm (2.40 in) H × 31 mm (1.22 in) D (Excluding protrusions), 95 g (3.3 oz) (Not including the battery)
AccessoriesCD-R (Instruction Manual, Logger Utility, Wireless Logger Collector) ×1, Measurement Guide ×1, Caution for Using Radio Waves ×1, AA alkaline batteries (LR6) ×2 , Connection cable L1010 ×1

Countries and regions where wireless operation is currently supported (LR8520)Last update: April 14, 2020

Wireless certificationJapan, United States, Canada, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, Thailand, Singapore, Australia, New Zealand, and Chile
Exempt from the wireless regulationsViet Nam, Hong Kong, Macao, Myanmar, Colombia, Georgia, and Kenya

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Seminar Videos On Demand

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Seminar Schedule

Registration Open

Kaohsiung Industrial Automation Exhibition 2020 - Taiwan

Aug 6, 2020 - Aug 9, 2020


Catalog: WIRELESS LOGGING STATION LR8410 Download PDF  [6MB] English
Catalog: WIRELESS MINI LOGGER LR8512, LR8513, LR8514, LR8515, LR8520 Download PDF  [3MB] English
Catalog: WIRELESS FUNGAL LOGGER LR8520 Download PDF  [3MB] English

User Guides

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If you can not download, log into your myHioki account to access more technical documents and information where available.

Instruction Manual English
Measurement Guide English
Precautions Concerning Use of Equipment that Emits Radio Waves Japanese

Outline Drawings

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Other options

The L1010 is bundled with the LR8520 for alarm output.


1.5 m (4.92 ft) length


100 V to 240 VAC


Measurement sensor


50 mm (0.16 ft)


1.5 m (4.92 ft)

For the PC

LOGGER UTILITY is a bundled software


• For the HIOKI Memory HiLoggers • The control of the measurement of loggers, real-time data collection • Wavefrorm display, data conversion, calculation, search, print

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