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Model DI-2108

USB DAQ and Stand-alone Data Logger, 32GB USB Flash Drive, 4-8 Analog Inputs, ±10 V, 160kHz, Anti-aliasing Filter, 7 D I/O, Free WinDaq Software


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Need a better front-end and resolution, please consider DI-2108P

  • Includes a DI-2108 instrument, a 6-foot USB cable, a screwdriver for signal connections, an NIST-traceable Calibration Certificate, and a 32GB USB flash drive with WinDaq software (downloadable at
  • Provided with WinDaq/Lite Software which records up to four channels (Unlock Code required to record all 8 channels using WinDaq - See Accessories)
  • Stand-alone capability records data to USB thumb drive (Unlock Code required to record all channels to USB thumb drive - See Accessories)
  • Eight armored analog differential inputs
    • Up to ±100 V without damage
    • 80 dB common mode rejection
    • Fixed measurement range of ±10 V full scale
  • Adaptable anti-alias filter per channel - Corner frequency set as a function of sampling rate
  • Up to 16-bit analog-to-digital resolution (Calculate Resolution)
  • Up to 160,000 Hz Sample Throughput Rate using WinDaq Acquisition software
  • Up to 160,000 Hz Sample Throughput Rate in stand-alone mode using high speed microSD card
  • Seven digital ports
    • Programmable per port as input or switch
    • Support for rate measurements to 50 kHz
    • Support for 16-bit counter
    • External trigger input
  • Published protocol for software development in all operating systems
  • Live XY, FFT, and Log data to Excel directly via WinDaq addons
  • Markings: CE, UKCA
  • Find out how long your data logger can record to removable flash memory with our Record Time Calculator
  • 10% Education Discount
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DI-2108 Data Acquisition System
DI-2108 DAQ and Data Logger Side Panel DI-2108 DAQ and Data Logger Side Panel DI-2108 DAQ and Data Logger Complete DI-2108 DAQ and Data Logger Kit
This data logger features 8 analog input channelsThis data logger features 7 digital portsThis data logger features a plus/minus 10 Volt full scale rangeThis data acquisition system can sample and record data at up to 160,000 sample per second throughput
This data logger can save data directly to a USB flash driveThis data logger has a USB interface10% Education DiscountThis data acquisition system has a 30-day Money back guaranteeThis data logger is manufactured in the United States of America


DI-2108 High Speed USB Data Acquisition and Data Logger System with Windaq software and 32GB USB flash drive. Features 8 differential analog input channels, 12 to 16-bit measurement resolution, a full scale range of ±10V, and stand-alone data recording to removable USB thumb drive. Includes a DI-2108 instrument, a 6-foot USB cable, a screwdriver for signal connections, an NIST-traceable Calibration Certificate, and a 32GB USB flash drive with WinDaq software (downloadable at and the Calibration Certificate (.pdf).

Model DI-2108 delivers premium analog performance at a surprisingly affordable price. Eight analog input channels provide differential measurement flexibility and a ±10 V full scale range. The differential input configuration provides noise rejection, easily adapts to singleended signal sources, and is protected up to ±50 V dc or peak ac so that inevitable measurement mishaps will not harm the instrument. The front-end feeds a flexible resolution analog-to-digital converter that ranges from 12 to 16 bits as a function of sampling rate. Lower sampling rates deliver higher resolution readings. The maximum sampling throughput rate of the DI-2108 is 220 kHz, providing 12 bits of resolution. Rounding off the analog subsystem are anti-alias filters per channel with automatic selection of corner frequency at approximately one tenth of the sampling frequency. Finally, an external trigger input allows A-D conversion to be synchronized to external events.

The DI-2108 provides 7 digital ports, each configurable as an input or a switch. Input protection is provided to 25 V. When activated as inputs two ports allow dual functionality as discrete inputs, or programmed as a counter or rate input. The rate input features a 50 kHz maximum measurement allocated over twelve programmable measurement ranges (10 Hz to 50 kHz full scale.) The counter input provides 16-bit resolution and a terminal count value of 65,535. The discrete, counter, and rate inputs are members of the same internal scan list used by the analog input channels. This means that all enabled elements are acquired synchronously, which allows meaningful comparisons between analog and digital channels. For example, the rate input measuring engine speed allows rpm data to be acquired in lock-step with analog data. Configured as a switch a digital port can be used to control external loads up to 25 V @ 100 mA, and the switch can be controlled asynchronously without interfering with the scanning process.

A USB drive is used to record data in stand-alone mode. The DI-2108 can record continuously using a circular buffer with pre-defined trigger conditions or a record-until-full approach supporting remote start/stop. A push button allows manual start/stop control over the recording process. With a flash memory card incorporating SLC technology, throughput rates up to 160 kHz can be achieved. That rate drops to 50 kHz when using pSLC card, and 20 kHz using a flash memory card incorporating MLC. The included WinDaq data acquisition software makes configuring the DI-2108 for stand-alone operation quick and intuitive. Use WinDaq to set up channels and create a reference file. That reference file can then be copied to the USB drive and used for quick setup.



DI-2108 Unlock Code

WinDaq Unlock Code


Unlocks WinDaq to allow recording all the channels available on your device. Unlock Code required for each device. Unlock Code ONLY. No CD will be shipped. Please Note: If you are ordering this software for a device you already own, you MUST provide the serial number of your device under "Order Notes" during checkout to receive the unlock code. Please allow one (1) business day for processing.


DI-2108 Unlock Code for Stand-alone Operation

Stand-alone Unlock Code


Unlocks both WinDaq (to allow recording all the channels available on your device) and stand-alone data logger operation (allows all channels to be recorded to removable USB flash memory). AC power adapter included for stand-alone operation (part number 101085). Unlock Code sent via Email. No CD will be shipped. Please Note: If you are ordering this software for a device you already own, you MUST provide the serial number of your device under "Order Notes" during checkout to receive the unlock code. Please allow one (1) business day for processing.


4-20mA current loop shunt resistor

R250 Shunt Resistor


Precision 250 Ω resistor, 0.1%. Learn More


32GB USB Flash

32GB USB Flash Drive


32GB 3.0 USB flash drive for stand-alone recording up to 20,000 Samples per second throughput.


16GB microSD Card (Mid-Speed)

16GB Mid Speed Micro SD Card


Mid-speed 16 GB micro SD flash memory card. Recommended for recording rates from 20,000 S/s throughput to 40,000 S/s throughput.


32GB Industrial-Grade MicroSD Card (High-Speed)

32GB Mid Speeed MicroSD Card


High-speed 32 GB Industry-grade & high endurance MicroSD flash memory card. Recommended for recording rates higher than 40,000 S/s throughput and harsh environment.


microSD Card Reader

Micro SD Card Reader


Micro SD Card Reader with USB A interface. Hi-Speed USB 2.0 compatible transfer rates. No additional card adapters required


AC/DC Adapter

AC/DC Adapter for Sensor Excitation


AC Adapter for Sensor Excitation. Input: AC 100V-240V 50/60Hz; Output: 12V DC 0-2A 24W. Power Cable Length: 36.6 inch (0.9m).


DC/DC Converter

DC/DC Converter


Allows you to power data logger with a battery. Input voltage: DC8-35V, (12V/24V changes to 5V); Output parameter: DC5V 3A, 15W MAX


USB Ferrite Choke

Ferrite Choke


Ferrite choke reduces interference for USB-based data acquisition products.


USB Cable

Dual Ferrite USB cable for ChannelStretch


Optional USB Cable for use with ChannelStretch™. Dual ferrite cores provide maximum protection against ground bounce that could lockup your PC's USB port during data acquisition. 20.4-inch (520 mm) overall cable length. Recommended whenever products are deployed in our ChannelStretch™ configuration.


7 Port USB Hub



Powered 7 port USB hub to synchronize multiple USB devices. Please note: Not all DATAQ Instruments devices support synchronization - check your product datasheet or product page for detailed information. Note: Provided with a US ac adaptor only, and is not suitable for use in countries that require an ac mains connector other than the US type.


USB Extension Cable

16-foot USB 2.0 extension cable.


16-ft USB Extension Cable. USB 2.0 Type A. Daisy chain up to 5 cables for extended length.


AC Power Supply

AC power supply


Optional AC power supply (USB to AC) for stand-alone applications and charging EL-WiFi Series products. Includes US adapter.


1-30L/min. Flow Sensor

1 to 30mL per minute flow sensor


YF-S201 Flow Sensor Measures 1-30L/min. Light weight, small size, durable, and easy to install. Inlaid with stainless steel impeller shaft. Lowest working voltage: DC4.5 5V-24V; Max current: 15 mA (DC 5V); Max operation temp: 120°C. Learn more.


Calibration Certificate

NIST Calibration Certificate


Re-calibration Service, this calibration certificate is included with new instruments. NIST-traceable certificate for model DI-2108 high speed data acquisition product. Includes before and after data. Shipping charges do apply when ordering online. Learn more about Calibrating your device.


EU Power Adapter

European Power Adapter


Spare European Adapter for AC power supply 101017-2 and 101085.


UK Power Adapter

UK Power Adapter


Spare UK Adapter for AC power supply 101017-2 and 101085.


Australian Power Adapter

Australian Power Adapter


Spare Australian Adapter for AC power supply 101017-2 and 101085.


AC/DC Current Clamp

AC/DC Current Probe


AC/DC Current Clamp includes 9V battery and user manual. Download the DataSheet (pdf) to learn more or go to the product page.



Data Acquisition Recording and Playback Software

Included FREE with your DI-2108 purchase. Record as many as 4 channels at 160,000 samples per second throughput. Installs drivers and WinDaq recording and playback software. Includes optional Add-on software with a valid installation key. Record all 8 channels with an Unlock Code (see Accessories).

WinDaq Data Acquisition Software


Drivers only Download

Installs drivers for all contemporary data acquisition hardware products that support WinDaq software.

Starter Kit Drivers


WinDaq-to-Excel Real Time Link

Real-time data logging directly to Microsoft Excel (supports MS Office 2003 or higher). No programming required. Free Trial Version. Purchase full version on WinDaq/XL product page.

WinDaq Data Acquisition Software

WinDaq Add-ons and Utilities


Library of add-on packages for WinDaq Software, such as live XY plot, FFT, Spectrogram, Meter, Gauge, Alarm, Calculated channels, etc.

WinDaq Data Acquisition Add-on Software

Python Example Programs

Available on GitHub

FREE Python example programs using the fully documented device protocol. All sample programs are well-commented to help you get up and running quickly.

DATAQ Python Example Programs

MATLAB Example Program

Program in Protocol Level

Learn how to program with MATLAB® in protocol level. Does not require MathWorks' Data Acquisition Toolbox.


LabView Example Programs

Available on GitHub

FREE LabView example programs using the Dataq's ActiveX Controls. All sample programs are well-commented to help you get up and running quickly.

DATAQ LabView Example Programs

Frequently Asked Questions

Can I save data in Microsoft Excel format?
Data can be streamed to Microsoft Excel using WinDaq/XL. Data can also be exported to Excel after acquisition using WinDaq Waveform Browser. See How to Import Recorded Data to Excel.

Can I program it under Matlab?
See our Matlab example on github.

Can I record 4-20mA sensor signals and if so, how do I do that?
4-20-mA process current signals can be measured with the DI-2108. See How to make 4-20mA current Loop Measurements for more information.

Does the device have internal memory (i.e. can I record in stand-alone mode)?
Though the DI-2108 does not have internal memory you can record data to a removable USB thumb drive (included with purchase). Configure the device with your PC then deploy in the field. An unlock code is required to store more than one channel to the USB thumb drive.

What kind of thumb drive can I use?
Almost any off-the shelf thumb drive can be used but could cause gaps in data. The thumb drives provided on our web site are tested and rated for speed. For higher speeds we recommend using the SLC micro SD card with a USB A microSD card reader available in Accessories.

Can I connect and measure data from a single-ended sensor?
Yes. Single-ended sensors can be connected and measured. The best practice is to connect the ground wire to the negative input of the channel.

Can I measure Thermocouple temperatures?
Thermcouple temperature measurements would not be accurate using the DI-2108 and should not be attempted. Thermocouple measurements are non-linear and require special programming to provide accurate readings.

Is software included with the device?
WinDaq Data Acquisition and Playback Software is included free.

Where do I download the software?
Download software at

Does the DI-2108 include a calibration certificate?
All new DI-2108 instruments ship with an NIST-traceable calibration certificate.

Can I get the DI-2108 re-calibrated?
Recalibration service is available and can be ordered online.

How often should I get the DI-2108 re-calibrated?
The DI-2108 should be re-calibrated annually.

Can I program this device in Python, C#, or .NET?
The published protocol of the DI-2108 is available for programming in any language. View our GitHub page for example programs. A .NET class is also available.

Is my sensor compatible with this device?
Maybe. Sensors with an output within the range of ±10 Volts can be used with the DI-2108. See how fine a measurement you can make with your sensor using the ADC Resolution Calculator. If you have any questions about compatibility just send your sensor information to our sales team at

How do I unlock my device?
If you purchase an unlock code when you order a DI-2108, the device ships unlocked and you do not need to do anything. If you purchased an Unlock code to upgrade in the field you can unlock the device following the instructions in the pdf manual ( - Chapter 5, "Unlock WinDaq or Stand-alone Operation").

Is the DI-2108 Isolated?
The DI-2108 is not an isolated instrument. The armored analog inputs can withstand up to ±50 V without damage.

Does the DI-2108 include digital or analog output channels?
The DI-2108 has seven bi-directional digital ports that can be programmed as an input or switch..

My sensor requires a power source, can the DI-2108 provide that power?
Yes. The DI-2108 can provide +5V power by connecting the appropriate wire to the +5V pin.


Analog Inputs
Number of Channels: 8 (Unlock code required to record more than 4 channels with WinDaq - see Accessories)
Configuration: Differential
Full Scale Range: ±10 V full scale fixed
Input impedance: 110 kΩ
DC accuracy: ±5 mV at 16-bit resolution 25°C, excluding common mode error
Absolute maximum input without damage: ±50 V dc or peak ac (normal mode + common mode)
Common mode range: ±10 V dc or peak ac
Common mode rejection ratio: 80 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection: -80 dB
Digital Inputs
Number of ports: 7
Type: MOSFET switch
Configuration: Programmable as digital input or switch
Pull-up value: 4.7 kΩ
Input high voltage threshold: 2.4V
Input low voltage threshold: 0.8V
Absolute maximum applied voltage (V): 0 ≤ V ≤ 25 V
Reserved Digital Inputs  
Port 1: WinDaq remote events
Port 2: WinDaq remote start/stop
Port 3: Rate input
Port 4: Count input
Digital Ports Programmed as Switch  
Maximum drain voltage: 25 V
Maximum sink current: 100 mA
Count/Rate Inputs  
Digital port assignment: Count: Port 2 configured as input
Rate: Port 3 configured as input
Internal pull-up value: 4.7 kΩ
Input high voltage threshold: 2.4V
Input low voltage threshold: 0.8V
Terminal count: 65,535
Maximum rate frequency: 50 KHz with one enabled channel, 20 KHz with 2-4 enabled analog channels, otherwise 10 KHz.
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
Power Consumption: <1.0 Watt, via USB interface
ADC Characteristics
Resolution: 12 to 16-bit
Above zero ADC counts: 2,047 to 32,767
Below zero ADC counts: 2,048 to 32,768
Maximum sample throughput rate: 220,000 S/s (160,000 S/s throughput for analog channels, plus 20 kHz per enabled digital channel)
Minimum sample throughput: Hardware only: 20 S/s
WinDaq software: 2.2 samples per hour
Sample rate timing accuracy: 50 ppm
Removable Memory
Type: MLC, pSLC, or SLC flash memory (with USB SD card reader); USB thumb drive
Required Format: FAT32
Indicators and Connections
Interface: USB 2.0 (mini-B style connector)
Status LED: Multi-color LED
Input Connections: Two 16-position terminal strips
Operating Temperature: 0 to 50 °C
Operating Humidity: 0 to 90% RH non-condensing
Storage Temperature: -20 to 60 °C
Storage Humidity: 0 to 90% non-condensing
Physical Characteristics
Enclosure: Polycarbonate ABS, 0.080 inch thickness
Mounting: Desktop; bulkhead
Dimensions: 3.28D × 6.68W × 1.13H in. (83.31D × 169.67W × 28.7H mm.)
Weight: 5.7 oz. (162 grams)
Software Support
WinDaq software: OS support
Programming: DATAQ .NET Class, Instrument protocol, ActiveX Control


Introducing the DI-710 Voltage Data Acquisition and Data Logger System
Adaptable Anti-aliasing Filters

See how DATAQ's anti-aliasing filters work.
How to Use the DATAQ Instruments DI-2108 Rate Channel
Rate Channel

Learn how to Use the DI-149/DI-155/DI-2108 Rate Channel to Acquire Frequency Data
How to Use the DATAQ Instruments DI-2108 Counter Channel
Counter Channel

Learn how to Use the DATAQ Instruments DI-149/DI-155/DI-2108 Counter Channel
How to make 4-20mA current measurements using the R250 and a Data Instruments Data Logger
4-20mA Measurements

Learn how to connect a 4-20mA signal using the R250 shunt with Dataq products.
How to make pressure measurements using a pressure sensor and a Dataq Instruments Data Logger
Pressure Measurements

Learn how to make pressure Measurements with a pressure sensor and Dataq products.
How to make flow measurements using a flow sensor and a Dataq Instruments Data Logger
Flow Measurements

Learn how to make Flow Measurements with a flow sensor and Dataq products.
Stand-alone data logger configuration using the WinDaq Dashboard Utility
Stand-alone Setup

Learn how to configure your data logger to record to USB thumb drive.
Exporting Data to Excel
Export data to Excel

Learn how to export data from WinDaq Waveform Browser to Microsoft Excel.
Introduction to WinDaq Data Acquisition Software
WinDaq Data Acquisition Software

Introduction to WinDaq Data Acquisition Software.

Similar Products

Quick Product Comparison

Expansion with
other models (DI-)
Max Sample
Rate (Hz)
1100 4 ±10 V - 40,000 - 12 2 In - - - $79
2108 4 or 8 ±10 V - 160,000 Yes 12-14 7 Bi Yes Yes Yes $199
2108-P 4 or 8 B 2108-P 160,000 - 16 7 Bi Yes Yes Yes $449
4108-U 4 or 8 C 4108-U, 4208-U, 4718B-U 160,000 Yes 12-16 7 Bi Yes Yes Yes $449
4108-E 4 or 8 C 4108-E, 4208-E, 4718B-E 160,000 Yes 12-16 7 Bi Yes Yes Yes $499
4208-U 4 or 8 A 4208-U, 4108-U, 1120, 4718B-U 160,000 Yes 12-16 7 Bi Yes Yes Yes $449
4208-E 4 or 8 A 4208-E, 4108-E, 4718B-E 160,000 Yes 12-16 7 Bi Yes Yes Yes $499

*Expand with ChannelStretch™. Compatibility with other units dependent on model.

Use the following chart to determine Measurement Ranges:

±2 V
±5 V
±10 V
±20 V
±50 V
±100 V
±2.5 V
±5 V
±10 V
0-5 V
0-10 V
±200 mV
±500 mV
±1 V
±2 V
±5 V
±10 V