Amprobe TR300 Temperature and Relative Humidity Data Logger

(6 customer reviews)

  • Instrument for indoor air quality monitoring
  • Temperature / RH in one model
  • Wall mountable, self-standing or tripod mountable
  • Extra large digital display
  • Displays Temperature, RH plus Real time date/hour stamp
  • Air Temperature or Dew Point (DP) display and Celsius/Fahrenheit are selectable
  • Offers both visible LEDs plus audible warnings to monitor IAQ condition
  • Small size design with USB interface
  • Memory points selection : 1000, 2000, 4000, 6000, 8000,12000,16000
SKU: 3311844 Category:


The Amprobe TR300 temperature and humidity data logger is designed to monitor indoor air quality in one compact size unit. The housing includes a wall-mount hook for easy installation. It has a large digital triple display and audible and visible alarms, plus a fast responding sensor and electronics to help monitor the relative humidity and temperature of the indoor air.

The TR300 has capacity to store 16,000 readings and ships with the unique Amprobe Download Suite software. Set up these parameters for recording: sample interval timing, start/stop, date and time, hi/lo alarm threshold, unit selection, and number of memory points. Download Suite software works with all Amprobe devices and stores the data from the TR300 for further analysis.


Range Relative Humidity 0 to 100%
Temperature -4 to 158 °F
Accuracy Relative Humidity ±3% @ 10~90%; ±5% @ others
Temperature ±1 °F @ 32 °F – 122 °F; ±2 °F @ others
Resolution Humidity 0.1%
Temperature 0.1 °F
Battery life 150 Hours
Battery 4 x AA batteries included
Dimensions 6.89 x 1.65 x 0.63 in
Weight 0.622 lb
Operating humidity 0-100% RH
Operating temperature -4 to 158 °F
Storage temperature -4 to 158 °F
Agency approvals & certifications


Temperature and Relative Humidity Data Loggers      

No need to second guess with an Amprobe temperature and humidity data logger.

What’s Included

  • TR300
  • USB Cable
  • Download Suite Software CD
  • Table Feet
  • Batteries


Datasheet »
Product Manual »

6 reviews for Amprobe TR300 Temperature and Relative Humidity Data Logger


    Excellent documentation

    Customer says it is to hot in his office. Is he stalling to pay the bill or is there really a problem?

    Now you can know for sure one way or the other.

    ✔ Yes, I recommend this product.

  2. RAmend


    Download suite does not work on 2 different personal computers! Maybe USB driver does not work with Win 7.
    Recommendation: Product may be o.k., but software is not. do dot use this product.
    Hands off of this product.

    TRLog can not be downloaded, because file is encrypted. Not allowed with software rules of our company.

    ✘ No, I do not recommend this product

  3. Ramses


    how can i activate the speker of my tr300?


    ✔ Yes, I recommend this product.

  4. mfh2211

    No P3 on Displayed

    Tried to start time for recording as per manual but failed as there’s no ‘ P3’ on displayed.

    ✘ No, I do not recommend this product

  5. calman

    Good accuracy, poor display control

    We have several of these and the accuracy has been very good, with one exception. Batteries last two years. The main frustration is that the display flashes all the time on three units, and on the original unit it is continuous (preferred). The manual is useless for this problem, not addressing it at all. The display is large and easy to read, but you cannot just glance and get the readings, you have to stare at it as it blinks the data.

    ✘ No, I do not recommend this product

  6. Gabodivine

    Problems with the speaker

    I need the speaker sounds when i configure the alarm and that information is not in the user manual. How can i do?

    ✘ No, I do not recommend this product

  7. Amprobe

    The speaker sound feature is only activated when TR300 is connected/powered by a 9 V DC power adapter (external power adapter, not supplied with the product).

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