Indoor Air Quality data loggerWireless CO2 Data Logger

Wireless CO2 Data Logger

with Temperature and Humidity

  • TandD - TR-76Ui / TR-76Ui-S
  • Channels: CO2 Concentration, Temperature, Humidity
  • Range: CO2: 0 to 9999ppm
  • Temperature: 0 to 55°C(Ui) / -25 to 70°C(Ui-s)
  • Humidity: 10 to 95%RH(Ui) / 0 to 99%RH (-20°C~)(Ui-s)
  • Comm Interfaces: USB, Serial, Infrared

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Why buy from Geneq? - find out more

The TR-7Ui series, with a simple USB connection to your PC, provides an easy way to make detailed settings and download data.

Basic settings and REC start/stop can also be done by simply pressing buttons on the units themselves.


TR-76Ui is a three-channel data logger designed to measure and record CO2 concentration, temperature and humidity. The CO2 warning notification feature helps provide a standard for timing ventilation in classrooms and building.


Simply place the TR-76Ui at the measurement site after starting recording. Recorded data can then be downloaded by connecting the logger to a PC with a USB cable and using our Windows software “CO2 Recorder for Windows”. Data downloaded to your PC can then be viewed and analyzed with our Windows compatible software “T&D Graph”. By connecting a logger to your PC, it is also possible to monitor current readings using our Windows software. External devices such as buzzers and lights can also be connected to provide instant on-site notification.


The TR-76Ui-S is a three-channel data logger designed to measure and record CO2 concentration, temperature and humidity with high accuracy.

The CO2 warning notification feature helps provide a standard for programmed ventilation in classrooms and buildings. This model comes with a high-accuracy temperature-humidity sensor, making it perfect for situations where strict temperature and humidity control is required in addition to CO2 measurement.





    Temperature-Humidity Sensor

    Measurement Channels

    Temperature 1ch

    Humidity 1ch

    Temperature 1ch

    Humidity 1ch




    SHA-3151 High-Precision Type


    Polymer Resistance


    Polymer Resistance

    Measurement Units

    °C, °F


    °C, °F


    Measurement Range (*1)

    0 to 55 °C

    10 to 95%RH

    -25 to 70 °C

    0 to 99 %RH (*2)






    ±0.5 °C


    5 %RH

    at 25 °C, 50 %RH


    at 10 to 40 °C


    all other temperatures


    ±2.5 %RH

    at 15 to 35 °C,

    30 to 80 %RH

    Measurement Resolution

    0.1 °C

    1 %RH

    0.1 °C

    0.1 %RH


    Response Time (90%): Approx. 7 min.

    Response Time (90%): Approx. 7 min.


    CO2 Sensor (Internal)

    Measurement Channels

    CO2 Concentration 1ch



    Measurement Units


    Measurement Range

    0 to 9,999 ppm


    ±(50 ppm + 5% of reading) at 5,000 ppm or less (*3)

    Measurement Resolution

    Minimum of 1 ppm


    Response Time (90%): Approx. 1 min.


    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)


    LCD Display Items

    Measurements, Battery Level, etc.

    Measurements: CO2 concentration, Temperature or Humidity (fixed or alternating display)


    Communication Inter- faces

    USB Communication

    Infrared Communication IrPHY 1.2 low power (*4) Serial Communication RS-232C (*5)

    External Alarm Terminal (*6)

    Output Terminal:   Open Drain Output

    (Voltage when OFF: DC less than 30V / Current when ON: less than 0.1A / Resistance when ON: about 15 )


    AC Adaptor (AD-06A1 or AD-06C1) , AA Alkaline Battery LR6 x 4

    Battery Life

    Approx. 2 days (batteries only without AC adaptor) (*7)


    H 96

    × W 66

    × D 46



    Approx. 120 g


    Operating Environment

    Temperature: 0 to 45°C,

    Humidity: 90 %RH or less (no condensation)



    Temperature-Humidity Sensor THA-3001

    High Precision Temperature-Humidity Sensor SHA-3151

    AA Alkaline Battery LR6 x 4, AC Adaptor AD-06A1 or AD-06C1, USB Mini-B Cable US-15C, Software CD-ROM, User’s Manual Set (Warranty Included)

    *1: Make sure to use the data logger within the operating environment as listed in the specifications.

    *2: When continually used in environments with temperatures above 60°C, accuracy of humidity measurements will decrease over time. Also, humidity cannot be mea- sured at temperatures below -20°C.

    *3: Stated value is the measurement accuracy of the CO2 sensor when Auto Calibration is operating properly. A change in atmospheric pressure directly influences the reading of CO2, which can cause measurement errors; a decrease in pressure by 10hPa results in a relative decrease in CO2 by 1.6%. In such a case, we recom- mend carrying out the “Atmospheric Pressure Correction” function found in CO2 Recorder for Windows.

    *4: If you wish to use infrared communication to download recorded data, it is necessary to purchase the Data Collector TR-57DCi (sold separately).

    *5: Customers wishing to write their own software, please contact your local distributor for the serial communications protocol specifications. (Note: Optional serial

    communication cable TR-07C is also required.)

    *6: In order to use the external alarm terminal, please prepare a compatible connector: JST PAP-04V-S.

    *7: Battery life varies depending upon multiple factors including ambient temperature, recording interval, frequency of communication, 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. Battery life may be shortened if the unit is used under inverter type fluorescent lighting.

    The specifications listed above are subject to change without notice.