A data logger is an electronic device designed to record measurements such as temperature, pressure, voltage, or humidity over time. Unlike traditional data acquisition systems that require a computer, a data logger is a compact, often portable, all-in-one device that automatically monitors and stores data.
In simple terms, a data logger is like a tireless assistant that continuously tracks environmental or industrial conditions 24/7 without supervision.
Learn more about data loggers and explore our full range of options here.
What Does a Data Logger Do?
A data logger continuously measures signals from connected sensors and saves the information for later analysis. Depending on the model, it can:
- Log data to an internal memory or SD card
- Transmit data wirelessly via Wi-Fi, Bluetooth, or cellular networks
- Stream data to a live dashboard for real-time monitoring
In essence, what a logger does is capture accurate data at regular intervals, helping engineers, researchers, and technicians make informed decisions.
For more in-depth knowledge on how to monitor and control your data, check out this guide on WaveForms Data Logger.
What is a Data Logger Used For?
Data loggers are used in industries where accurate, long-term measurements are crucial. Here are some common applications:
- Environmental monitoring – Recording temperature, humidity, rainfall, or air quality in field studies
- Industrial processes – Measuring vibration, voltage, or pressure to optimize efficiency and reduce downtime
- Transportation and Logistics – Monitoring cold chain shipments to ensure perishable goods stay within safe temperature ranges
- Research and Education – Capturing experimental data in laboratories or student projects
- IoT projects – Sending live data from remote locations for automation or analysis.
These examples show that the uses of data loggers vary widely—from scientific research to day-to-day industrial maintenance.
Types of Data Loggers
Data loggers come in different forms depending on how you plan to set them up and use them. Some are compact and standalone, others connect directly to a computer, while newer models can be managed entirely online. Here are the main types by design and setup:
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- Standalone data loggers – Compact devices that record data directly to internal memory or an SD card. Ideal for simple applications like temperature tracking.
- Wireless or IoT data loggers – Transmit logged data over Wi-Fi or Bluetooth, making them perfect for remote or mobile monitoring.
- Computer-based data loggers – Connect directly to a PC for real-time recording and analysis. Suited for labs or controlled environments.
- Web-based data loggers – Configured and accessed entirely through a web browser without extra software (e.g., Digilent WebDAQ). Excellent for cross-platform use (Windows, Mac, Linux).
Explore Digilent’s WebDAQ Ethernet Remote Data Loggers.
Key Specifications to Consider When Choosing a Data Logger
| Feature | Why It Matters | Digilent Example |
| Sampling Rate | Defines how frequently data is captured | OpenScope MZ – up to 50kS/s (note: maximum rate may vary based on Wi-Fi, USB, and SD card speed) |
| Storage Capacity | Determines how long you can log before downloading | WebDAQ – 3GB internal + FTP, SD/USB for additional storage |
| Sensor Compatibility | Ensures the logger works with the sensors you need | DAQHats with Raspberry Pi |
| Connectivity | Enables data transfer or remote monitoring | USB, Wi-Fi, cellular options |
| Portability | Important for field projects and mobility | OpenScope MZ – portable + Wi-Fi |
Knowing these specs helps you understand how to use a data logger effectively for your specific application.
If you’re looking for a reliable and versatile data acquisition solution, check out Digilent’s data acquisition systems.
How to Use a Data Logger?
Learning how to use a data logger is straightforward. Most models follow these steps:
- Connect the sensors (temperature probes, accelerometers, etc.).
- Configure the logger using software like WaveForms Live or a web interface.
- Set logging parameters such as sample rate, channels, and duration.
- Start recording to internal storage, SD card, or cloud server.
- Retrieve and analyze the data through charts, tables, or export files.
For Digilent’s WebDAQ series, all you need is a browser—no additional software required.
Benefits of Using Data Loggers
- Accuracy and reliability –Automates data collection without human error
- Remote monitoring – Wireless and IoT loggers can transmit from anywhere
- Efficiency – Saves time and reduces the need for manual checks
- Versatility– Works across industries, from environmental monitoring to crash testing
- Cost savings – Prevents equipment failure with predictive maintenance
Frequently Asked Questions
What is the difference between a data logger and a data recorder?
A data recorder typically captures short-term signals and displays them visually, often on paper or a screen. A data logger records measurements over long periods and stores them digitally for later analysis.
What are other names for a data logger?
They are also known as dataloggers, electronic loggers, or logging devices.
What are the disadvantages of data loggers?
Some models may have limited storage, slower sampling rates, or require external software. Ruggedized or high-performance loggers may also be more expensive.
How many types of data loggers are there?
The main types include standalone, wireless, computer-based, and web-based data loggers.
Why would you use a data logger?
You would use a data logger to automate and simplify long-term data collection, ensuring accurate and reliable monitoring in environments where manual checks aren’t practical.
I thought it was interesting when you mentioned that the fast you sample data, the faster you are collecting data when using a data logger. I’m not really familiar with what a data logger would be used for, but if I were to guess it would probably be helpful in recording temperatures in different locations. I would be interested in learning about other uses data loggers have.
Completely agree with you remote monitoring of data is a very useful feature that is offered by data loggers. It solves various critical problems faced by various organizations.
Data is very precious for all businesses hence it is important to track and monitor the data correctly.
With the help of data loggers, we can capture and log in the data remotely.
Remote monitoring of data is by far the most useful feature. Newer data loggers like the ones I just read about here use cloud services, which I found quite useful and interesting: https://www.vfcdataloggers.com/wireless-cloud-data-logging-advantages/
How do people even do things without data loggers? A couple of years ago I didn’t know what they were and now I can’t imagine my life without them. Crazy.