TandD TR-71NW

  • 2 Channel temperature measurement
  • Includes 2 standard 24″ temperature sensor
  • Measuring Range: -40 to 110°C
  • Operating Range: -10 to 45°C
  • Accuracy: ±0.3°C
  • Logging capacity: 8,000 data sets
  • Measurement resolution: 0.1°C
  • 100Base-TX/10Base-T (RJ45 Connector) and USB interfaces
  • View data on mobile devices via Thermo App
  • WebStorage Service available



The TandD TR-71nw Ethernet Temperature Data Logger

The TR-71nw Ethernet Temperature Data Logger is a two-channel, LAN wired model with an external thermistor sensor and a measuring range of -40 to 110°C. In addition to the standard features such as battery operation and USB communication (through optional cable, sold separately), the TR-71nw supports communication with mobile devices. By using T&D’s WebStorage Service, users can access stored data anytime from the cloud.

Applications include:

  • Managing temperature and humidity in hospitals, museums, and temperature controlled warehouses
  • Performance testing of humidity and heat control in housing
  • For managing temperature and humidity in server rooms
  • Recording temperature and humidity in subways and train cars

View the TR-7x Product Brochure (PDF) or the TR-7wf/nw Series Overview Video.


TR-71nw TR-72nw TR-72nw-H
Sensor (External) (*1) Thermistor Thermistor Polymer Resistance Platinum Resistance Electrostatic Capacitance
Measurement Channels Temperature 2ch Temperature 1ch Humidity 1ch Temperature 1ch Humidity 1ch
Measurement Units °C, °F °C, °F %RH °C, °F %RH
Measurement Range -10 to 60°C
(Internal Sensor)*1
-40 to 110 °C (Supplied Sensor)
0 to 55 °C 10 to 95 %RH -30 to 80 °C 0 to 99 %RH
Accuracy Avg.±0.3 °C

[-20 to 80 °C]

Avg.±0.5 °C

[-40 to -20 / 80 to 110 °C]

±0.5 °C ±5 %RH

[at 25 °C, 50 %RH]

±0.3 °C

[0 to 50 °C]

±0.5 °C

[all other temperatures]

±2.5 %RH

[at 25 °C, 10 to 85 %RH]

±4.0 %RH

[at 25 °C, 0 to 10 %, 85 to 99 %RH]

At temperatures other than 25 °C and ≥ 0 °°, add ±0.1
%RH per degree of difference from 25. Humidity Hysteresis: ±1.5
%RH or lower (*2)

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.

Response Time (90%):

Approx. 20 sec.

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 Wired LAN Communication

100BASE-TX/10BASE-T (RJ45 Connector)
Protocol: HTTP *3, DHCP, DNS

USB Communication
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)
, PoE IEEE 802.3af (TR-7nw only)
Battery Life
With LAN communication: Approx. 10 days to 1.5 years *5
Without LAN communication: Approx. 1.5 years
Dimensions H 58mm × W 78mm × D 26mm
Weight Approx. 65g
Operating Environment Temperature: -10 to 60 °C

Humidity: 90 %RH or less (no condensation)

Accessories *7 Temperature Sensor

(TR-0106) x 2

Temperature/Humidity Sensor

(THA-3001) x 1

High Precision Temperature/Humidity Sensor

(HHA-3151) x 1

AA Alkaline Battery (LR6) x 2, Registration Code Label,
Manual Set (Warranty Included)
Software TR-7wf/nw for Windows, T&D Graph, T&D Thermo
  • *1:For TR-71wf: When wireless LAN communication is used frequently, the measurement of the internal sensor may rise by around 0.3°C.
    For TR-71nw: When using PoE or USB as the power supply, the data logger itself generates heat and internal sensor will report a temperature approximately 15°C higher than ambient.
  • *2: The WPS feature is not available when WEP(64bit/128bit) or WPA-PSK(TKIP) is selected in Access Point Settings. If you wish to use the WPS feature, please select WPA2-PSK(AES) or disable wireless security.
  • *3: HTTP client. Proxy supported (for firmware version 1.05 or above for TR-7wf).
  • *4: Battery life varies depending upon multiple factors including frequency of communication, 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.
  • *5: Approx. 10 days when Auto-upload Interval is 1 min, 1 yr when 1 hr, 1.5 yrs when 12 hrs or more.
  • *6: -10 to 45°C when using external power (PoE or USB). (for TR-7nw)
  • *7: Software is not included in the package, but can be downloaded free of charge from the download page.
  • *8: For installation, it is necessary to have Administrator (Computer Administrator) rights.
  • *9: If you are using Windows 8, please note that our software is designed to be used in “Desktop” mode only.
  • *10: We recommend using an operating system in the same language as the display language. Operation in different languages is not guaranteed.


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 setup automatic data transmission from the following T&D products to the WebStorage Service:

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