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Model DI-4208-U

USB DAQ and Data Logger, 12 to 16-bit resolution, 160,000 S/s Throughput, Records to USB flash drive


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Can only record 4 channels using WinDaq software.

Replaced with DI-4208-E (Support both USB and Ethernet)
  • Includes a DI-4208 instrument, a 6-foot USB cable, a screwdriver for signal connections, and a USB flash drive with WinDaq/Lite software (downloadable at and an NIST-traceable calibration certificate (.pdf)
  • 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 (units cannot be synchronized in stand-alone mode). See Accessories. WinDaq/Unlock code required per device for data synchronization in WinDaq.
  • Stand-alone capability to USB thumb drive (Unlock Code required to record all channels to USB thumb drive - See Accessories)
  • 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
  • 12 to 16-bit analog-to-digital resolution (Calculate Resolution)
  • Programmable ranges: ±2, ±5, ±10, ±20, ±50, ±100 V full scale
  • Eight armored analog differential inputs*
    • Up to 120 V rms without damage
    • 50 dB common mode rejection
  • Adaptable low-pass filter per channel
    • Corner frequency set as a function of sampling rate
  • 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
    • Syncs with itself and models DI-4108 and DI-1120 in any combination
    • Synchronization not available in stand-alone mode
    • 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
  • CE Approved
  • Find out how long your data logger can record to removable flash memory with our Record Time Calculator
  • 10% Education Discount

*WinDaq/Unlock required per device to use ChannelStretch™ and to record more than four total channels when using WinDaq software. See Accessories.

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DI-4208 Data Acquisition System
DI-4208-U DAQ and Data Logger Side Panel DI-4208-U DAQ and Data Logger Side Panel DI-4208-U DAQ and Data Logger
This data logger features 8 analog input channelsThis data acquisition system is expandable with ChannelStretch allowing you to connect multiple units and synchronize data recording.This data logger features 7 digital ports
This data acquisition system can sample and record data at up to 160,000 sample per second throughputThis 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-4208 High Speed USB Data Acquisition System with Windaq software. Features 8 differential analog input channels (Unlock Code required to record more than 4 total channels to WinDaq), 12 to 16-bit measurement resolution, full scale ranges of ±2, ±5, ±10, ±20, ±50, and ±100 V, and stand-alone data recording to removable USB thumb drive.

Model DI-4208 delivers premium analog performance at a surprisingly affordable price. Eight analog input channels provide differential measurement flexibility and programmable ranges per channel of ±2, ±5, ±10, ±20, ±50, and ±100 V full scale. The differential input configuration provides noise rejection, easily adapts to single-ended signal sources, and is protected to 120 V rms so that inevitable measurement mishaps will not harm the instrument. The front end feeds a variable 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 analog sampling throughput rate of the DI-4208 analog subsystem is 160 kHz, providing 12 bits of resolution. Below 10 kHz the instrument delivers 16-bit resolution with a single enabled analog channel. Below 2 kHz per analog channel the DI-4208 provides 16-resolution with five or more enabled analog channels. See inside for details. Rounding off the analog subsystem are low-pass filters per channel with automatic corner frequency selection as a function of sampling rate. All these features combine to provide pure data acquisition power at an unmatched price point.

The DI-4208 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 can be programmed as a counter or rate input respectively. 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 during scanning.

A USB drive is used to record data in stand-alone mode. The DI-4208 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-4208 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.


WinDaq/Unlock for Device You Already Own

DI-4208 Unlock Code

WinDaq Unlock Code


Unlocks WinDaq to allow recording more than four channels and ChannelStretch™ with WinDaq for device you already own. Unlock Code required for each device for ChannelStretch™ operation. Unlock Code ONLY. Please Note: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.

SA-Enabled-4208 for Device You Already Own

DI-4208 Unlock Code for Stand-alone Operation

Stand-alone Unlock Code


Unlocks all channels and ChannelStretch™ on WinDaq and stand-alone data logger operation (allows all channels to be recorded to removable USB flash memory). Unlock Code ONLY. No Power Supply Included. No CD will be shipped. Please Note: 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


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.


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.


16GB high-endurance pSLC microSD Card (High Endurance)

16GB Mid Speed Micro SD Card


High-endurance 16 GB micro SD flash memory card. Recommended for recording rates between 10,000 S/s and 60,000 S/s throughput. 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).


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.


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.


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-4208 high speed data acquisition product. Includes before and after data. Shipping charges do apply when ordering online. Learn more about Calibrating your device.


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.


US Power Adapter

US Power Adapter


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


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.


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 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-4208 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

MATLAB Example Program

Program in Protocol Level

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


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

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

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: ±2, 5, 10, 20, 50 100 V
Input impedance: 795 kΩ
Absolute accuracy: 0.25% of full scale range @ 25°C, excluding common mode error
Absolute maximum input without damage: 120 V rms(normal mode + common mode)
Common mode range: ±10 V dc or peak ac
Common mode rejection ratio: 50 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection: -80 dB
Digital Ports
Number of ports: 7
Type: MOSFET switch
Threshold levels: TTL-compatible
Absolute maximum applied voltage (V): 25 V dc
Programmed as a Switch  
Maximum drain voltage: 25 V
Maximum sink current: 100 mA
Internal pull-up value: 4.7 kΩ
Input high voltage threshold: 2.4 V
Input low voltage threshold: 0.8 V
Terminal count: 65,535
Maximum rate frequency: 50 KHz with one enabled channel
20 KHz with 2-4 enabled channels
10 KHz with 5-7 enabled channels
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
Reserved Digital Inputs  
Port 1: WinDaq remote events
Port 2: WinDaq remote start/stop
Port 3: Rate input
Port 4: Count input
Power Consumption: <1.0 Watt, via USB interface
ADC Characteristics
Resolution: 12 to 16-bit (Calculate)
Above zero ADC counts: 2,047 to 32,767
Below zero ADC counts: 2,048 to 32,768
Maximum sample throughput rate: 160,000 S/s
Minimum sample throughput: 20 Hz (2.2 samples per hour with WinDaq)
Sample rate timing accuracy: 50 ppm
ChannelStretch™ Operation/td>
Maximum number of units: 16
Maximum channel count: 128 analog, 112 digital
Maximum supported throughput: ≥480 kHz
Synchronization conditions: Syncs with any combination of DI-1120, -4108, and -4208 instruments up to a total of 128 analog and 112 digital channels.
All synced instruments must operate at the same sample rate per channel, regardless of channel number, type, or range.
PC USB prerequisite: All instruments must be connected to the same USB controller. The use of USB hubs are recommended to meet this requirement.
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)
Indicator light: Multi-color LED
Input Connections: Two 16-position terminal strips
USB A Connector (Drive): USB port for stand-alone data logging
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: 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.
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 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 - - -
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