TandD TR-73U

  • Temperature, humidity and barometric pressure logger
  • Temperature measuring range: -0°C to 50°C(-40°C to 110°C with opt. temp only sensor)
  • Humidity measuring range: 10% to 95% RH
  • Pressure measurement range: 750 to 1100 hPa
  • External sensors included
  • USB interface with PC
  • 8,000 point/channel memory
  • Multifunction display
  • Operates up to 10 months on single AA battery



The TR-73U USB Temperature Humidity Pressure Data Logger has three channels: one temperature, one humidity, and one barometric pressure. This compact, lightweight model has been designed with low energy consumption for longer battery life; coupled with its easy-to-use software and USB connection makes this product the foundation of our Thermo Recorder line.

The product is an all-in-one package that includes the data logger unit, sensor and software. Simply by connecting to a PC via a USB connection and carrying out a few easy steps, the measurement and recording of data can be started.

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


Measurement Item Temperature Humidity Barometric Pressure
Measurement Channel 1 Ch 1 Ch 1 Ch
Internal Temperature Sensor -10 to 60°C 750 to 1100 hPa
0 to 50°C 10 to 95%RH 750 to 1100 hPa
Option Sensor -40 to 110°C 750 to 1100 hPa
Measurement Accuracy Average ±0.3°C(0 to 50°C) ±5%RH (At 25°C 50%RH) ±1.5hPa
Measurement Resolution Display 0.1°C 1%RH 0.1hPa
Sensor Thermistor Macromolecular Humidity Sensor Barometric Pressure Sensor
Recording Interval 1,2,5,10,15,20,30 sec./ 1,2,5,10,15,20,30,60 min./ Total of 15 choices
Logging Capacity 8,000 data sets (*1)
Recording Method Endless (Overwrite from the oldest data when recording capacity is full)
One time Method (Stop recording when recording capacity is full)
LCD Display Measurements (Ch1 only, Ch2 only, Ch3 only,alternating display), Recording Status,Battery Life Warning, Amount of Recorded Data, Unit of Measurement
Battery AA Alkaline battery (LR6)
Battery Life About 10month (*2)
Interface USB Communication
USB Communication time When downloading 1 unit at full logging capacity: about 11 sec.
Dimentions H55mm x W78mm x D18mm
Weight About 62g (Including AA alkaline batteries)
Operating Environment for Main Unit Temperature: -10 to 60°C
Humidity: under 90%RH (without condensation)
Attached Sensors TR-3100 x 1

(*1) One data set consists of readings for all channels in that type of unit.
(*2) Battery life depends upon the measuring environment, recording interval, and quality of the battery being used.