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The Digit-TL logs temperature and approximate light.

Quantity Discounts:
1 - 9 = $35.95 per unit
10 - 99 = $33.95 per unit
100+ = $31.95 per unit
Stock Status: 
In Stock

Battery powered data logger

The Digit series collects data in a remote location, and stores it to internal memory. When finished, the data can be downloaded via the convenient USB connector. Traditional applications include shipping, weather monitoring, agriculture, and refrigeration. The miniature size makes it convenient for logging temperature on-the-go.

Every data point is given a timestamp, so it is possible to see when temperature changes occur, and with 7 different log intervals, it is easy to customize how frequently data points are collected. Use the 2 programmable LED alarm thresholds to detect if temperatures exceeded permissible boundaries, such as in a refrigerator. One unique feature to this data logger is the included approximate ambient light sensor.

An optional aluminum enclosure can be purchased if the device needs to be submerged in water for extended periods of time.  The aluminum enclosure does not let any light into the case so the light readings will always report it being "dark".

This device supports Windows XP, Vista, 7, 8, 8.1, and 10.  The UI program called Otero is not available for Mac OS X and Linux based operating systems.

Hardware Overview

Memory 260,000 Readings
Logging intervals 10s, 30s, 1m, 10m, 30m, 1h, 6h
LED Alarms 2x user-defined thresholds
Battery life 3.3 Years @ 25°C and 1m logging rate
Battery type 3V CR1632 coin cell, replaceable
Software Free, Windows only
Communication USB
Real-time clock ±2 seconds per day @ 25°C
Memory-Wrap No
Single/Multi-Use Multi-use
Conformal Coating Yes
Operating Temperature -35°C to +85°C (-31°F to +185°F)
Vented Plastic Enclosure (-TLH) IP53 - Bottom lid is vented
Solid-lid Plastic Enclosure (-TL) IP67 - Water Resistant
Aluminum Enclosure IP68 - Not hermetically sealed

Note: This is not a mass storage device, use the provided software to download data.

Note: If buying the aluminum enclosure add-on, remove the spare O-rings from the enclosure before use. 

  • Up to 4yr battery life
  • Optional aluminum enclosure
  • 7 Log intervals: 10s, 30s, 1m, 10m, 30m, 1h, 6h
  • Stores 260,000 readings
  • 2 Programmable LED alarms
  • Free software (Windows only) - Export data to .csv
  • Small size
  • Approximate ambient light sensor


  • Temperature and light
  • Shipping, containers, refrigeration
  • Weather, geocaching, agriculture
  • Dew point, HVAC

For more technical specifications look at the Digit's datasheet.

Other Highlights

Satisfaction Guaranteed

Everything we sell has a 30-day money back guarantee. If, for any reason, you are not satisfied with a product, contact us to arrange your choice of a refund or replacement. In addition, each LabJack Digit-TL/TLH is covered by a 1-year limited warranty.

Technical Support

All LabJacks include lifetime technical support. Support resources include forum, FAQs, email, and telephone.

Need more information?

See the Digit support homepage for specifics related to the Digit. Follow the steps under Quickstart to setup and begin logging. If the support documents do not answer your question, please contact us.


There are no accessories for this product.

Support Resources

Getting Started

Digit USB data logger Software and Driver

Install Software

1. Download and install the Digit's installation package.

Digit-TL/Digit-TLH USB Data Logger Device Connected via USB

Connect Digit

2. Connect the Digit to the computer via USB.

Otero Device Selection Tab

Run Otero

3. Otero is a free application installed by the Digit's installation package. You should be able to find it in the Start Menu links.

Go to the Digit's Quickstart page for more detailed instructions.

Installation Packages and Downloads

LJM Software Stack Installer (Software Section)

T7 and Digit Installation Packages

T7 USB, Ethernet, WiFi Data Acquisition and Control (DAQ) Device Image Digit Battery Powered Temperature, Light, and Humidity Datalogger
Software and driver installers for the T7 and Digit devices.
Look at the LJM Changelog for details about the latest updates.


Download the latest firmware here.

Datasheet and Application Notes

Available Applications & Utilities

Applications - Digit Application Highlights

Digit Applications



Otero: Digit compatable USB Data-Logging Application


Otero a configuration and downloader tool for the Digit series data-loggers.

Installation Instructions

Applications compatible with the Digit are installed by the LJM Library installer. Check the installer's download page for more details.

Example Code

LJM Example Code Table HTML (Referencable)

Example Code/Wrappers: LJM Library

T7 Digit

T7, Digit

Examples In... Windows Mac Linux
.NET (C#, VB)
Visual Basic (VB6, VBA)
Agilent VEE

There are also direct Modbus TCP examples. Note that some features, such as streaming, are greatly simplified by the LJM library. A list of the available Modbus registers that the T7 supports is available on the Modbus Map page.

Example code specifically tailored to the Digit-TL/Digit-TLH can be found in the appendix-b section of the Digit's datasheet.