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Model DI-2108-P

Expandable to 128 channels USB DAQ and Stand-alone Data Logger, 32GB USB Drive, True 16-bit resolution, High common mode range +/-220V, 160,000 S/s Throughput, and Programmable ranges of ±2.5, ±5, ±10, 0-5, 0-10 Volts

Why is high common mode range so important?

Select Options: 

  • Includes a DI-2108-P instrument, a 6-foot USB cable, a screwdriver for signal connections, and a 32GB USB flash drive containing an NIST-traceable Calibration Certificate and WinDaq software (also downloadable at
  • Provided with WinDaq Software which records up to four channels at any sampling rate (purchase WinDaq/Unlock to record all channels, or to synchronize multiple units)
  • Stand-alone capability records data to USB thumb drive (Unlock Code required to record all channels to USB thumb drive - See Accessories; Unlock code NOT available for units prior to February 2020)
  • Up to 160 kHz sample throughput rate
  • Up to 160,000 Hz Sample Throughput Rate in stand-alone mode using high speed microSD card
  • True 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 ±150 V without damage
    • 80 dB common mode rejection
    • High common mode range: +/-220V
  • 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
  • Markings: CE
  • 10% Education Discount
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DI-2108-P Data Acquisition System
DI-2108-P DAQ and Data Logger Side Panel DI-2108-P DAQ and Data Logger Side Panel DI-2108-P DAQ and Data Logger Complete DI-2108-P DAQ and Data Logger Kit
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 can save data directly to a USB flash driveThis data logger has a USB interface
10% Education DiscountThis 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 and Data Logger System with Windaq software and 32GB USB flash drive. Features 8 differential analog input channels, 16-bit measurement resolution, a full scale measurement ranges of ±2.5, ±5, ±10, 0-5, and 0-10 Volts, and stand-alone data recording to removable USB thumb drive. Includes a DI-2108-P 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-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 ±150 V dc or peak ac so that inevitable measurement mishaps will not harm the instrument. Bipolar ranges measure signals above and below zero, while resolution 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.


DI-2108-P Unlock Code for Stand-alone Operation

Stand-alone Unlock Code


Unlocks both WinDaq (to allow recording all the channels available on your device as well as ChannelStretch) 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

$ 2.99
R250 Shunt Resistor


250 Ω ±0.1% Precision, Metal Film, 1/2W, Axial Resistor
Exceptionally low noise; typically 0.10 μV/V
Low voltage coefficient to ±5 ppm/V
Flame retardant coating. RoHS compliant. Learn More


32GB USB Flash

32GB USB Flash Drive


32GB 3.0 USB flash drive for stand-alone recording up to 10,000 Samples per second throughput.


1GB Industrial SLC microSD Card (High-Speed)

1GB SLC High Speed Micro SD Card


1 GB Industrial Industry-grade high speed SLC microSD flash memory card. Recommended for recording rates higher than 80K S/s throughput rate and harsh environment. microSD Card Reader (Part#2000352) is needed


32GB Industrial-Grade microSD Card (High-Endurance)

32GB Mid Speeed MicroSD Card


32 GB Industry-grade high capacity microSD flash memory card. Recommended for recording rates between 10,000 S/s and 40,000 S/s throughput rate and harsh environment. microSD Card Reader (Part#2000352) is needed


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 (such as 4-20mA) Excitation. Input: AC 100V-240V 50/60Hz; Output: 12V, 2A. 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.


High Accuracy Pressure Sensors

Pressure Sensor


2000361-H High precision pressure sensor measures PSI ranges of -14.5 up to 10000 PSI dependant on model. Made with 316 stainless steel and high temperature auto-graded plastic. 0.5% accuracy. 0.5V – 4.5V linear voltage output.


4-20mA Output High Accuracy Pressure Sensors

Pressure Sensor


2000361-HX 4-20mA Output High precision pressure sensor measures PSI ranges of -14.5 to 10000 PSI dependant on model. 8-30V supply voltagle, such as a car battery. Made with 316 stainless steel and high temperature auto-graded plastic. 0.5% accuracy. 4-20mA linear current output.


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.


Temp/RH Probe

Temperature and Humidity probe


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


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.


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.


Australian Power Adapter

Australian Power Adapter


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


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.


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.



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

WinDaq ExcelLink

WinDaq-to-Excel Real Time Link

High speed (up to 160K s/s) with powerful trigger methods to capture or stream data to Excel in real time, compatible with ChannelStretch, supports both 32- and 64-bit Excel. No programming is needed.

WinDaq Excel Link

WinDaq Add-ons and Utilities


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

WinDaq Data Acquisition Add-on Software

WinDaq XY Viewers

Live XY charting for WinDaq and WWB


Originally designed for GE Mining Division, these two XY plotting utilities are great tools for trouble shooting their mining equipments.

WinDaq Data Acquisition XY Viewerse

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

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

How often should I get the DI-2108P 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-2108P is available for programming in any language. View our GitHub page for example programs.

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

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

My sensor requires a power source, can the DI-2108P provide that power?
Yes. The DI-2108P 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: 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: ±150 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.
Removable Memory
Type: MLC, pSLC, or SLC flash memory (with USB SD card reader); USB thumb drive
File Format CSV (Excel compatible) or WinDaq (Higher capacity and max speed)
Required Format: FAT32
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.)
3D Model Click here
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
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 - - -
2108 4 or 8 ±10 V - 160,000 Yes 12-14 7 Bi Yes Yes Yes
2108-P 4 or 8 B 2108-P 160,000 Yes 16 7 Bi Yes Yes Yes
4108 4 or 8 C 4108, 4208, 4718B, 4730 160,000 Yes 12-16 7 Bi Yes Yes Yes
4208 4 or 8 A 4208, 4108, 4730, 4718B 160,000 Yes 12-16 7 Bi Yes Yes Yes

*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