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Easy, Wireless Collection of a Variety of Data Types, including Voltage Input and Thermocouple Types K and T



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 LR8515 Wireless Voltage/Temperature Logger provides easy, wireless collection of a variety of data types, including voltage input and thermocouple types K and T, all in a single device.

Order Code

LR8515 2 ch, sensor is sold separately

Bluetooth® is a trademark of Bluetooth SIG, Inc. and licensed for use by HIOKI E.E. CORPORATION.


Key Features

• A single device to measure everything from the minute voltages of pyranometers or heat flow sensors to battery voltage to temperature

• Compact, two-channel model fits where other devices don’t

• 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

■ Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Supported instrument  

[Used as standalone product (Data collected manually) ]
Windows PC or Windows tablet (CD-R with software included)
Android smartphone or Android tablet terminal
(Software can be downloaded free of charge 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 logging 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 channels


2 ch (isolated; select voltage of thermocouple for each channel), Input terminals: M3 screw type terminal block


Measurement items


Voltage/ Thermocouple (K, T)


Maximum input voltage


DC ±50 V, Max. inter-channel voltage DC 70 V


Measurement range


[Voltage] ±50 mV to ±50 V , Max. resolution 0.01 mV
[Thermocouple] -200 ˚C to 999.9 ˚C, Thermocouples (K, T), Max. resolution 0.1 ˚C

Measurement accuracy  

[Voltage] ±0.05 mV (50 mV range)
[Thermocouple] ±0.8 ˚C (Thermocouple K -100 ˚C to 999.9 ˚C)
*Reference junction compensation: Switchable between internal and external
*Reference junction compensation accuracy: ±0.5 ˚C
(When using internal compensation, add to thermocouple measurement accuracy.)
*Temperature characteristics: Add (measurement accuracy × 0.1) / ˚C to measurement accuracy.


Display items


Measurement value, date, time, number of recorded data, maximum value, minimum value, and average value




Alarm, Scaling, Recording operation hold function, Erroneous operation prevention, Comment recording function, Power saving function, Authentication function, Free run




[Capacity] 500,000 data items for each channel [Mode] Instantaneous value [Interval] 0.1 to 30 sec, 1 to 60 min, 16 selections


Power source


AC ADAPTER Z2003 (AC100 V to 240 V, 50 Hz/60 Hz), AA alkaline batteries (LR6) ×2, External power DC5 V to 13.5 V (can also be supplied from USB bus power, with a conversion cable)


Continuous operating time ([Capacity] 500,000 data items for each channel) (23˚C)


2.5 months (Recording interval of 1 min, Bluetooth® OFF)
7 days (Recording interval of 1 sec, Bluetooth® ON)
2 days (Recording interval of 0.1 sec, during real-time measurement with the LR8410)


Dimensions, Weight


85W×75H×38D mm (3.35W×2.95H×1.50D in), 126 g (Not including the battery)




CD-R ×1 (Instruction Manual, Logger Utility, Wireless Logger Collector) , Measurement Guide ×1, Caution for Using Radio Waves × 1, AA alkaline batteries (LR6) ×2

Data can be downloaded using Hioki’s tablet and smartphone app (for Android devices).

Search for “HIOKI” and download the Wireless Logger Collector!

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.

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