TandD TR-71wf Temperature Data Logger

  • 2 Channel temperature measurement
  • External thermistor temperature sensor
  • 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 wireless interface
  • View data on mobile devices via Thermo App
  • WebStorage Service available



The TandD TR-71wf temperature data logger is a two channel 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-71wf supports communication with mobile devices. By using T&D’s WebStorage Service, users can access stored data anytime from the cloud.

Access to Recorded Data

By using a wireless LAN, data is automatically uploaded to the WebStorage Service (registration required). The service can be used with mobile devices such as smart phones and tablets allowing users to monitor current readings, alerts and downloading of data. The Thermo application must be downloaded and installed on any mobile device. Data can also be downloaded to a PC with a USB communication cable (sold separately).

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

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Sensor (External) (*1)TR-0106THA-3001HHA-3151(High-Precision Type)
ThermistorThermistorPolymer ResistancePlatinum ResistanceElectrostatic Capacitance
Measurement ChannelsTemperature 2chTemperature 1chHumidity 1chTemperature 1chHumidity 1ch
Measurement Units°C, °F°C, °F%RH°C, °F%RH
Measurement Range-40 to 110 °C (Supplied Sensor)

-60 to 155 °C (Optional Sensor: Fluoropolymer Coated Type)

0 to 55 °C10 to 95 %RH-30 to 80 °C0 to 99 %RH
AccuracyAvg.±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 °C, add ±0.1
%RH per degree of difference from 25. Humidity Hysteresis: ±1.5
%RH or lower (*2)

Measurement Resolution0.1 °C0.1 °C1 %RH0.1 °C0.1 %RH
ResponsivenessThermal 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 ItemsMeasurements (fixed or alternating display), Battery Warning
Mark, etc.
Logging Capacity8,000 data sets (One data set consists of readings for all
channels in that type of unit.)
Recording IntervalSelect from 15 choices: 1, 2, 5, 10, 15, 20, 30 sec. or
1, 2, 5, 10, 15, 20, 30, 60 min.
Recording ModeEndless (Overwrite oldest data when capacity is full) or
One Time (Stop recording when capacity is full)
Auto-upload IntervalSelect 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 InterfacesWireless LAN Communication

• Standard: IEEE 802.11b

• Security
: WEP (64bit/128bit), WPA-PSK(TKIP), WPA2-PSK(AES)

• WPS 2.0 : Push Button Configuration

• Protocol: HTTP, DHCP, DNS

USB Communication

• USB 2.0 (Mini-B connector)

PowerAA Alkaline Battery x 2 (AA Ni-MH batteries may also be
used), USB Bus Power (5 V 200 mA)
Battery Life
With wireless LAN communication: Approx. 10 days to 1.5 years
(Ex: Approx. 10 days when Auto-upload Interval is 1 min, 1 yr when 1 hr,
1.5 yrs when 12 hrs or more)Without wireless LAN communication: Approx. 1.5 years
DimensionsH 58mm x W 78mm x D 26mm
WeightApprox. 100g (including batteries)
Operating EnvironmentTemperature: -10 to 60 °C

Humidity: 90 %RH or less (no condensation)

AccessoriesTemperature 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)
  • *1
    : With the TR-71wf, it is also possible to measure temperature
    with the internal sensor. However, the measurement range is restricted
    to the operating environment for the whole device.
  • *2
    : When used in environments where temperature and humidity
    are over the values of 50 °C 75 %, 60 °C 50 %, 70 °C 35 %, and
    80 °C 25 %, sensor hysteresis may fluctuate by values greater than ±1.5 %RH.
    Under certain circumstances, it may take some time to return to normal
    measurement capability.
  • *3
    : 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
  • *4
    : Optional USB Mini-B Cable US-15C is required for USB
  • *5
    : Battery life varies depending upon the frequency of
    communication, 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.


  • 1. Sensor Jack
  • 2. Power Button
  • 3. Display Button
  • 4. Interval Button
  • 5. Rec/Stop Button
  • 6. USB Port
  • 7. Battery Cover


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