TandD TR71A

  • 2 Channel temperature measurement
  • Includes 2 standard 24″ temperature sensors
  • Measuring Range: -40 to 110°C
  • Operating Range: -10 to 60°C
  • Accuracy: ±0.3°C
  • Logging capacity: 8,000 data sets
  • Measurement resolution: 0.1°C
  • Built-in 802.11b/g/n, Bluetooth 4.2 (BLE) wireless, USB interfaces
  • View data on mobile devices via Thermo App
  • WebStorage Service available



The TandD TR71A WiFi & Bluetooth Temperature Data Logger

The TR71A is a temperature logger with two available sensor connections and can measure from -60 to 155℃. The wide range of optional sensors provides increased measurement flexibility.

The LCD screen allows the simultaneous display of either the current values of two channels, the highest and lowest values of channel 1, or the highest and lowest values of channel 2. The ALM icon on the LCD alerts the user of the occurrence of an alarm.

Use the wireless LAN feature to auto-upload data to the cloud for any time, anywhere access, and get warning notices. Connect to a PC with a USB cable to download recorded data and make setting changes.

The software application used with the TR71A has a “Vaccine Mode”, which meets or exceeds CDC requirements for VFC, and is useful for monitoring and recording vaccine temperatures. TR71A is useful not only in research labs and hospitals, but also in homes, offices, and other industries.

Special Features

The TR71A uses a wireless LAN access point to auto-upload recorded data and warning notifications to our free cloud-based “T&D WebStorage Service“. To make settings from and download data via USB to a PC, use our Windows software “TR7 for Windows”. Our Windows software “T&D Graph” makes it easy to view and analyze data from your PC.

The “T&D Thermo” mobile app that enables data viewing and settings from smartphones and tablets via Bluetooth communication will provide support for the TR71A in late 2021.



TR-71A TR-72A TR-72A-S
Sensor Thermistor Thermistor Polymer Resistance Thermistor Polymer Resistance
Measurement Channels Temperature 2ch Temperature 1 ch, Humidity 1 ch Temperature 1 ch, Humidity 1 ch
Measurement Units °C, °F °C, °F %RH °C, °F %RH
Accuracy (Supplied Sensor) Avg 0.3°C ±0.5 °C ±5 %RH [at 25 °C, 50 %RH] ±0.3 °C [10 to 40 °C] ±0.5 °C [all other temperatures] ±2.5 %RH at 15 to 35 °C, 30-80% RH (*3)
Measurement Resolution 0.1 °C 0.1 °C 1 %RH 0.1 °C 0.1 %RH
Responsiveness Thermal Time Constant: Approx. 75 sec. Response Time (90%): Approx. 190 sec. Response Time (90%): Approx. 7 min. Response Time (90%): Approx. 7 min.
LCD Display Items Measurements (fixed or alternating display), Battery Warning Mark, etc.
Logging Capacity 8,000 data sets (One data set consists of readings for all channels in that type of unit.)
Recording Interval Select from 15 choices: 1, 2, 5, 10, 15, 20, 30 sec. or 1, 2, 5, 10, 15, 20, 30, 60 min.
Recording Mode Endless (Overwrite oldest data when capacity is full) or One Time (Stop recording when capacity is full)
Auto-upload Interval Select from 15 choices: OFF (No auto-upload), 1, 2, 5, 10, 15, 20, 30 min. or 1, 2, 3, 4, 6, 12, 24 hrs.
Communication Interfaces Wireless LAN Communication • Standard: IEEE 802.11b/g/n • Security (*4) : WEP (64bit/128bit), WPA-PSK(TKIP), WPA2-PSK(AES) • WPS 2.0 : Push Button Configuration • Protocol: HTTP, DHCP, DNS Bluetooth Communication • Bluetooth 4.2 (Bluetooth low energy) USB Communication (*4) • USB 2.0 (Mini-B connector)
Power AA Alkaline Battery x 2 (AA Ni-MH batteries may also be used), USB Bus Power (5 V 200 mA), AC Adapter AD-05A2 or AD-05C2
Battery Life With wireless LAN communication: Approx. 10 days to 15 months
Dimensions H 58mm x W 78mm x D 26mm
Weight Approx. 55g
Operating Environment Temperature: -10 to 60 °C,  Humidity: 90 %RH or less (no condensation)
Accessories Temperature Sensor (TR-0106) x 2 Temperature/Humidity Sensor (THA-3001) x 1 High Precision Temperature/Humidity Sensor SHA-3151
AA Alkaline Battery (LR6) x 2, Registration Code Label, USB Mini-B Cable US-15C, Manual Set (Warranty Included)
*1 : Compatible wire sizes: Single wire AWG 22-28, stranded Wire AWG 22-28, strip length .4 inch
*2 : When Auto Upload is used frequently the internal sensor temperature may increase by about 0.3°C
*3 : When used continually in environments above 60°C the accuracy of humidity measurements will decrease over time. Humidity cannot be measured below -20°C.
*4 :If you wish to use the WPS feature, please select WPA2-PSK(AES) or “None”.
*7 : Battery life varies depending upon the frequency of communication, Auto Upload interval, wireless LAN environment, ambient temperature, recording interval, and battery performance. All estimates are based on operations carried out with a new battery and are in no way a guarantee of actual battery life.

Measurement RangeInternal Sensor-10 to 60 °C (*1)—-External Sensor-40 to 110°C (Supplied Sensor), -60 to 155°C (Optional Sensor: Fluoropolymer Coated Type)0 to 55 °C10 to 95 %RH-25 to 70 °C0 to 99 %RH (*2)


WebStorage Service

Free Online Service for Cloud Data Storage

It’s never been so easy to share your recorded data via the Internet! T&D’s free WebStorage Service is perfect for processing and managing data recorded in remote places or for allowing several people to view the same recorded data at their convenience. Users can check the current conditions of data loggers such as battery level and radio signal strength between the Base Unit and Remote Unit. Recorded data can be transmitted to the WebStorage Service from any compatible Tamp;&D product. Data storage capacity is 20MB.

Additionally, the data transmitted to T&D WebStorage Service can be accessed via your browser from anywhere, anytime, as long as an internet connection is available. Mobile device apps are also available for devices running iOS and Android.

Compatible Products

Users can set up automatic data transmission from the following T&D products to the WebStorage Service:

  • TR-7A Series
  • RTR-500 Series
  • RTR-601


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