TR-51i / TR-52i T and D Thermo Recorder Product ID: TR-51i , TR-52i

Compact Waterproof Type

The compact design allows the user to place a TR-5i Data Logger almost anywhere without worrying about space. Also, its durable body with waterproof and dustproof capacity makes it possible to be used in harsh environments.

The TR-51i with an internal temperature sensor offers superior waterproof capacity and moderate response time; it is suitable for use in transportation and storage, as well as, in harsh environments.

The TR-52i with an external temperature sensor is highly versatile and ideal for use in situations where a quicker response (compared to TR-51i) is required.

Wide Measurement Range: -60°C to 155°C

The TR-51i can measure and record temperature from -40°C to 80°C and the TR-52i can measure and record in the even wider range of -60°C to 155°C.

Large Logging Capacity: 16,000 Readings

One Data Logger can store up to 16,000 readings. At a recording interval of 10 minutes that would equal about 111 days, and at an interval of 60 minutes that would equal about 22 months of non-stop consecutive recording.

*The supplied software “T&D Recorder for Windows” provides 15 recording interval choices (from 1 second to 60 minutes) to meet your needs.

Low Energy Consumption Design: Impressive 4-year Battery Life

The low energy consumption design of the TR-5i series provides continuous operation for up to 4 years. When the battery needs to be replaced, the battery replacement mark will appear.

Estimated Battery Life:
When a new battery is being used and data downloading occurs four times a month (with infrared communication switched OFF)

*The battery replacement mark will appear based upon the calculation of battery use. It may appear sooner than noted above.
*Battery life varies depending upon frequency of communication, infrared communication settings, blinking of the warning LED, and measuring environments such as the ambient temperature.

Recording Settings Display

Recording mode (One-Time or Endless) and Infrared Communication settings will be displayed in the LCD.

Downloading Data: Infrared Communication / Optical Communication

In order to download recorded data from a TR-51i/52i, it is necessary to separately purchase a data collection device: either a Communication Port or a Data Collector.

Downloading Data via Infrared Communication
TR-57DCi: Data Collector Infrared Communication Type

Downloading data via Infrared Communication means that the TR-51i/52i Logger does not have to be placed on the Data Collector nor does it need to be moved meaning less work and less hassle.

Downloading Data via Optical Communication
TR-50U: Communication Port
TR-57DCi, TR-57U, RTR-57U: Data Collector

In addition to our forthcoming Data Collector TR-57DCi, previous data collection devices can also be used for downloading data via Optical Communication.

Communication time for downloading data from a TR-51i/52i varies depending upon the data collection device being used.
When downloading one Unit at full storage capacity:
TR-57DCi: about 24 seconds (optical communication) / about 55 seconds (infrared communication)
TR-57U: about 160 seconds (optical communication)
TR-50U: about 20 seconds (optical communication)

Checking Collected Data on the Spot (Data Collector)

When using a Data Collector, you can download recorded data from a TR-51i/52i, and view the data in graph or list form without connecting to your computer. It is also possible to confirm the occurrence of a warning from the data recorded by a TR-51i/52i for which the Warning Monitoring Function has been set.

Warning Monitoring Function

Using the supplied software “T&D Recorder for Windows”, you can make Upper / Lower Limits and Judgment Time settings for the TR-51i/52i. If a measurement exceeds one of the set limits, the warning LED and message will be displayed. Because the warning LED and message will remain ON until the data is downloaded, there is no way to miss any important warnings.

Adjustment of Measurements

The software enables you to use the measurement adjustment function to correct for TR-51i and TR-52i measurement inaccuracies.All settings can be made using the “Adjustment Tools” application in the supplied software “T&D Recorder for Windows”.

  TR-51i TR-52i
Measurement Item Temperature Temperature
Measurement Channels 1 Ch (Internal Sensor Type) 1 Ch (External Sensor type)
Measurement Range -40 to 80°C -60 to 155°C
Response Time
(in 90% still air)
About 35 min.   -
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
Logging Capacity 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 sec. / 1,2,5,10,15,20,30 and 60 min.
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 at full logging capacity:
Optical Communication:
  About 24 sec. (TR-57DCi),
  About 20 sec. (TR-50U),
  About 160 sec. (TR-57U),
Infrared Communication:
  About 55 sec. (TR-57DCi)
Power (*1) Lithium battery LS14250 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. When infrared communication function is enabled, battery life may be shortened if the unit is used under the inverter type fluorescent lighting.


1.LCD Display
2.Infrared Port
3.Optical Communication Area
4.ALM(ALARM / Warning LED)
5.Back Case
TR-52i is not water resistant unless the sensor has been connected.

1.LCD Display
2.Infrared Port
3.Optical Communication Area
4.ALM(ALARM / Warning LED)
5.Back Case
6.Sensor Jack
7.Fluoropolymer-coated Electrical Wire


Temperature / Humidity Graph
Up to eight channels of temperature and humidity data can be simultaneosly viewed in one Temp / Humidity Graph and up to eight channels of voltage, pulse, temperature and humidity data can be view channels, make changes to graph colors and zoom-in and -out on data with the click of a mouse. Color printing of the graph, as you see it on display, is also possible.
Data Collection
Upon downloading, a data collection report is displayed in an easy-to-view list. From there it is possible to change all downloaded data or selected data into graph form or into Text File Format.

To specify data file(s), while holding down the [Ctrl] button or the [Shift] button click on the files in the collected data list you wish to download.

Display Data in Table Form
The data in the graph can be viewed in table form with the High in red, the Low in blue and the Average in pink. You can print all of the data in the list or select and print only those pages you desire.
Save as Text File Function
This function allows you to save data in Text File Format (CSV Format); in order to use the data with spreadsheet applications such as Excel and Lotus.