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Model DI-2108-P

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


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  • Includes a DI-2108-P 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 at any sampling rate (purchase WinDaq/Unlock to record all channels, or to synchronize multiple units)
  • Up to 160 kHz sample throughput rate
  • 16-bit analog-to-digital resolution (use the Resolution Calculator to determine how small a change you can detect)
  • Programmable ranges: ±2.5, ±5, ±10, 0-5, 0-10 Volts
    • 0-5 Measurement Range best-suited for 4-20mA current measurements
    • Unipolar gain ranges provide better resolution
  • Eight armored analog differential inputs
    • Up to ±300 V without damage
    • 80 dB common mode rejection
  • Seven digital ports
    • Programmable per port as input or switch
    • Support for rate measurements to 50 kHz
    • Support for 16-bit counter
  • Supports ChannelStretch™ multi-unit synchronization:
    • Up to sixteen instruments
    • Up to 480 kHz throughput
    • Up to 128 analog channels and 112 digital ports
    • Unlock code required per device - purchase under Accessories tab
  • Software support includes ready-to-run WinDaq/Lite software and documented protocol for software development in all operating systems
  • Use HMP60 Probe for Temperature and Humidity Measurements
  • .Net Class with Example program
  • CE Approved
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DI-2108-P Data Acquisition System
This data logger features 8 analog input channelsThis data logger features 7 digital portsThis 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-P High Speed USB Data Acquisition System with Windaq software. Features 8 differential analog input channels, 16-bit measurement resolution, and a full scale ranges of ±2.5, ±5, ±10, 0-5, 0-10 Volts.

Model DI-2108-P delivers premium analog performance at a surprisingly affordable price. Eight analog input channels provide differential measurement flexibility and programmable ±2.5, 5, 10 V bipolar and 0-5 and 0-10 V unipolar ranges per channel. The differential input configuration provides noise rejection, easily adapts to single-ended signal sources, and is protected up to ±300 V dc or peak ac so that inevitable measurement mishaps will not harm the instrument. Bipolar ranges measure signals above and below zero, while resolu-tion is effectively doubled on unipolar ranges. The front end feeds a fixed resolution, 16-bit ADC. The maximum sampling throughput rate of the DI-2108-P is 160 kHz.

The DI-2108-P 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-P Unlock Code

WinDaq Unlock Code


Unlocks WinDaq to allow recording more than four channels. Also required to use ChannelStretch™ with WinDaq. 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.


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/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).


Temp/RH Probe

Temperature and Humidity probe


Temperature and humidity probe measures -40 to +60 °C and 0 to 100% RH. Learn more.


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


Calibration Certificate

NIST Calibration Certificate


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



Data Acquisition Recording and Playback Software

Included FREE with your DI-2108-P 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 and enable ChannelStretch with an Unlock Code (see Accessories).

WinDaq Data Acquisition Software


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


MATLAB Example Program

With SDK .Net Class

FREE DATAQ SDK .Net class example program with MATLAB®. 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


Analog Inputs
Number of Channels: 8 (Unlock code required to record more than 4 channels with WinDaq - see Accessories)
Configuration: Differential
Full Scale Range: Programmable ±2.5, ±5, ±10, 0-5, 0-10 Volts
Input impedance: 800 kΩ differential
DC accuracy: ±0.05% of range, 25°C, excluding common mode error
Absolute maximum input without damage: ±300 V dc or peak ac(normal mode + common mode)
Common mode range: ±228 V dc or peak ac
Common mode rejection ratio: 90 dB (dc to 60Hz 0Ω unbalance)
Channel-to-channel crosstalk rejection: 110 dB typical
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 (20 kHz with a single enabled channel and 160 kHz sampling rate)
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
Digital Ports Programmed as Switch  
Maximum drain voltage: 25 V
Maximum sink current: 100 mA
Power Consumption: <1.0 Watt, via USB interface
ADC Characteristics
Resolution: 16-bit
Resolution applied to measurements: >15.6-bit
Maximum sample throughput: 160 kHz throughput
Minimum sample throughput: Hardware: 1.831 kHz
with WinDaq software: 0.305 Hz
Sample rate timing accuracy: 50 ppm (typical over 24 hours)
ChannelStretch Synchronized Performance
Number of synced units: (PC-dependent) 16 units max; Throughput ≥ 480 kHz
Channel skew between any 2 units: 10 μS, typical
Setup constraints: Syncs only with other model DI-2108-P instruments.
Same number of enabled channels per synced unit (type does not matter)
Same sample throughput rate per synced unit.
All units connected to the same USB controller using one or more hubs.
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


Synchronous Data Acquisition Using the DI-2108-P USB DAQ
Synchronous Data Acquisition

Sync up to 16 DI-2108-P units together and record to a single file.
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
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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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
2108 8 - ±10 V - - 160 - 14 7 Bi Yes Yes $279
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 $299
4108 8 Yes D - 4208, 1120 160 Yes 12-16 7 Bi Yes Yes $349
4208 8 Yes A - 4108, 1120 160 Yes 12-16 7 Bi Yes Yes $349

*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