New Releases

New Product

Announcing New Data Logger TR-51i/52i Infrared Communication Type

Date Issued: October 19, 2010

We are proud to announce the release of our new TR-5i Series: an even more powerful and functional family of Data Loggers in a new refreshing white body color.
The TR-5i lineup includes the TR-51i with internal temperature sensor and the TR-52i with external temperature sensor; you get the same great features of our original TR–5S series data loggers (production discontinued) plus full functioning Infrared Communication.

The loggers in the TR-5i Series are capable of measuring a wide range of temperature: from -60°C to 155°C. And with an estimated battery life of about 4 years *1, you get long-term continuous measurement without continual battery replacement.
Moreover the Warning Monitoring Function, which notifies you of a warning by flashing the Alarm LED and displaying a warning message on the LCD screen, ensures you will not miss any important warnings.
The newly added Infrared Communication Function can be used with our forthcoming Data Collector TR-57DCi (to be available in late November 2010); it will be possible to download recorded data from any TR-51i / 52i via infrared communication without ever having to physically gather them.Off course, the TR-5i Series is also compatible with our previous infrared communication devices used with the TR-5S Series, such as “Communication Port TR-50U” and “Data Collector TR-57U”.

*1: Battery life varies depending upon the type of battery, the measuring environment, the frequency of communication, and so on. Also, note that battery life will be shortened by the use of infrared communication.

TR-5i Series Line-up

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The TR-5i Series Data Loggers are available in two types to meet your needs.
TR-51i:Internal Temperature Sensor Type
Immersion proof
Measurement Range -40 to 80 °C
TR-52i:External Temerature Sensor Type
Splash proof (with sensor connected)
Measurement Range -60 to 155 °C


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Application Examples


  TR-51i TR-52i
Measurement Item Temperature Temperature
Measurement Channels 1Ch (Internal Sensor Type) 1Ch (External Sensor type)
Measurement Range -40 to 80°C -60 to 155°C
Response Timea
(in 90% still air)
About 35 minutes   -
Measurement Accuracy Avg. ±0.5°C Avg. ±0.3°C : -20 to 80°C
  -40 to -20°C/ 80 to 110°C
Avg. ±1.0°C :
  -60 to -40°C/ 110 to 155°C
Measurement Display Resolution 0.1°C
Storage Capacity Up to 16,000 readings
Recording Start Method Immediate / Programmed
Recording Mordes Endless / One Time
Recording Interval Select from 1,2,5,10,15,20 and 30 seconds / 1,2,5,10,15,20,30 and 60 minutes
Recording Start Method Immediate Start / Programmed Start
LCD Displayed Items Measured Temperature, Recording Status, Recording Mode,
Infrared Communication Status, Battery Life Warning, Unit of Measurement,
Full(Storage Capacity FULL), Unconnected Sensor,
Measurement Range Exceeded, Upper/Lower Limit Exceeded
Communication Interfaces Optical Communication / Infrared Communication
Infrared Communication IrPHY 1.2 low power
Communication Time When downloading 1 Unit of full storage capacity:
Optical Communication:
  about 24 seconds (TR-57DCi),
  about 20 seconds (TR-50U),
  about 160 seconds (TR-57U),
Infrared Communication:
  about 55 seconds (TR-57DCi)
Power *1 Lithium battery ER3V M x 1 (Lithium battery CR2 also okay)
Battery Life *2 Maximum 4 years
(2 years if it's been selected to "Permit" infrared communication)
Waterproof Capacity IP67 (Immersion proof) IP64 (Splash resistant)
External Dimensions H62mm x W47mm x D19mm (Excluding protrusions and External Sensor)
Weight About. 54g
including battery
About. 55g
including battery/excluding sensor
Operating Environment -40 to 80°C
When using Lithium Batteries (CR2) sold in stores: -20 to 60°C
Data Collection Devices  Communication Port: TR-50U
 Data Collectors: TR-57DCi, TR-57U, RTR-57U

*1: The included Lithium Battery (LS14250) is not sold in stores. Please purchase the "Optional Battery Set TR-11P2" for replacement.

*2: Battery life depends upon the measuring environment, recording interval, and quality of the battery being used.

Release Date

Oct. 2010