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Model DI-2108

Data Acquisition USB DAQ, 12 to 16-bit resolution, 160,000 S/s Throughput

Out of

Expected ship date: April 26, 2019

  • Includes a DI-2108 instrument, a 6-foot USB cable, a screwdriver for signal connections, and downloadable WinDaq/Lite software
  • Provided with WinDaq/Lite Software which records up to four channels (Unlock Code required to record all 8 channels using WinDaq - 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 220 kHz sample throughput rate (160 kHz throughput for analog channels)
  • 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
  • .Net Class with Example program
  • CE Approved
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DI-2108 Data Acquisition System
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 has a USB interfaceGet same day shipping when you order this data logger before 3PM ETThis 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 System with Windaq software. Features 8 differential analog input channels, 12 to 16-bit measurement resolution, and a full scale range of ±10V.

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 ±100 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.



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.


4-20mA current loop shunt resistor

R250 Shunt Resistor


Precision 250 Ω resistor, 0.1%. Learn More


USB Ferrite Choke

Ferrite Choke


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



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


Solutions for .NET Programming Environments

FREE .Net control communicates directly with your DATAQ Instruments device using any .Net programming language. Detailed sample programs included. Fully documented help file. Requires .NET Version 4


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

With SDK .Net Class

FREE DATAQ SDK .Net class example program with MATLAB®. Does not require MathWorks' Data Acquisition Toolbox.



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: ±100 V dc or peak ac (normal mode + common mode)
Common mode range: ±20 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
Indicators and Connections
Interface: USB 2.0 (mini-B style connector)
Indicator light: 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
Making 4-20mA Current Measurements

Learn how to connect a 4-20mA signal using the R250 shunt with Dataq products.
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.

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Quick Product Comparison

Expandable* Measurement
Expansion with
other models (DI-)
Max Sample
Rate (kHz)
1100 4 - ±10 V - - 40 - 12 2 In - - $59
1110 8 - ±10 V - - 160 - 12 7 Bi Yes Yes $89
1120 4 Yes A - 4108, 4208 160 - 14 7 Bi Yes Yes $178
2108 8 - ±10 V - - 160 - 14 7 Bi Yes Yes $259
245 4 - B Yes - 2 - 14 2 In - - $299
2108-P 8 Yes C - 2108-P 160 - 16 7 Bi Yes Yes $349
2008 8 Yes B Yes 2008 2 - 16 7 Bi Yes Yes $499
4108 8 Yes D - 4208, 1120 160 Yes 12-16 7 Bi Yes Yes $299
4208 8 Yes A - 4108, 1120 160 Yes 12-16 7 Bi Yes Yes $299

*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
±10 mV
±25 mV
±50 mV
±100 mV
±250 mV
±500 mV
±1 V
±2.5 V
±5 V
±10 V
±25 V
±50 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