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Model DI-188

Data Acquisition USB DAQ and Data Logger System, 12-bit, up to 8,000 S/s thourouput rate

  • Includes a DI-188 instrument, a USB-C cable, a screwdriver for signal connections, and free downloadable WinDaq software. Windows 10 or higher is required
  • No programming needed when using WinDaq software!
  • Low-cost, Compact USB Data Acquisition Starter Kit
  • Four ±10 V Differential Analog Inputs, protected to ±30 V
  • Max 4 Khz sampling throughput rates
  • Optional I2C Grove interface port at extra cost
  • Does this product have enough resolution for your application? Find out with our ADC Resolution Calculator
  • Open source for easy expansion (Temperature, Accelerometer and Air Pressure examples available)
  • Submit a support ticket to discuss your application, and you may get one at 50% discount!
  • Upgradable via Arduino IDE
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DI-188 Data Acquisition Starter Kit
This data logger supports 12-bit adc resolutionThis data acquisition unit features four analog inputsThis data logger features a plus/minus 10 Volt full scale rangeThis data logger features open source firmware
This data logger has a USB interfaceThis data acquisition system has a 30-day Money back guaranteeSupport I2C grove expansion


DI-188 USB Data Acquisition starter kit with downloadable WinDaq software. Featuring four differential analog input channels, 12-bit measurement resolution and a fixed ±10V full scale measurement range. Sample rates as slow as 0.1 Hz and as fast as 8 kHz (with a single channel enabled) are supported. No programming needed when using WinDaq software!

Suitable for preamplified analog voltage measurements, the DI-188 (with included WinDaq software) allows for real time data acquisition, playback, and analysis, with performance equal to or better than comparable products in the same price category. Built on an Arduino® compatible module, the DI-188 begins a new chapter, with a fully open source firmware and protocol allowing for easy expansion. DI-188 is by far the most Arduino® community friendly, value-oriented starter kit ever.

DIY Projects

Started with DI-188's open source firmware, one can easily add extra sensors and features to the data stream. Here are a few:.



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


USB Ferrite Choke

Ferrite Choke


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


AC/DC Adapter

AC/DC Adapter for Sensor Excitation


AC Adapter for Sensor Excitation.: AC input: 100V-240V. DC output: 5V 2A. Cable length: 2.95ft. DC plug connector size: 5.5x2.5mm. Includes screw terminal connector.


Standard Pressure Sensors

Pressure Sensor


Pressure sensor measures PSI ranges of 0-30 up to 0-500 PSI dependant on model. Requires seperate 5V power supply. Made with 316 stainless steel and high temperature auto-graded plastic. 2% Accuracy. 0.5V – 4.5V linear voltage output.


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).


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.


Grove Connector

Spare power supply for DI-808 Web-based Data Logger


Grove Connector for DI-188 to use I2C, RS232 or DIO ports



Data Acquisition Recording and Playback Software

Included FREE with your DI-188 purchase. Installs WinDaq recording and playback software.

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, etc.

WinDaq Data Acquisition Add-on Software

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-188. 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)?
The DI-188 stores acquired data to a connected PC using either WinDaq Acquisition software or by writing your own program. The device does not have hardware to store data to internal memory or removable memory. The nearest device that can is the DI-2108.

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 at all using the DI-188 and should not be attempted. Thermocouple measurements are in the 50mV to 100mV range. With a 12-bit ADC converter and a full scale range of ±10V makes the DI-188 very ineffective. Thermocouple measurements are also 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

Can I get the DI-188 calibrated?
Calibration service is not offered for the DI-188. If you wish to calibrate it yourself, please use this calibration utility. Consider the DI-2108 if NIST traceability is required.

Can I program this device?
Built on an Arduino® compatible module with rich resource from Arduino® community, the Open Source firmware of the DI-188 allows users to expand its functionality. 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-188. 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



Analog Inputs
Number of Channels: 4
Configuration: Differential
Full Scale Range: ±10 V full scale fixed
Input impedance: 1MΩ
Isolation: none
Absolute maximum input without damage: ±30 V peak
System noise: 7.8 mV rms
Maximum common mode + differential voltage: ± 10 V
Common mode rejection ratio: 40 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection: -70 dB
Typical Accuracy: ±50 mV @ 25°C, excluding common mode error
If you wish to have more accurate readings, please use this calibration utility
Power Consumption: <0.2 Watt, via USB interface
ADC Characteristics
Resolution: 12-bit
Above zero ADC counts: 2,047
Below zero ADC counts: 2,048
Maximum sample rate per channel: 8 kHz, 1 enabled channel
4 kHz, 2 enabled channels
2 kHz, 4 enabled channels
Minimum sample throughput: 0.02 Hz
Indicators and Connections
Interface: USB-C
Indicator lights: 4 LEDs on Arduino® compatible module
Input Connections: One 8-position terminal strip
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
Dimensions: 2.0D × 2.5W × 0.55H in. (5.08D × 6.35W × 1.40H cm.)
Weight: 0.8 oz.
Software Support
WinDaq software: Driver less for Windows 10 and higher
Programming: Open source firmware


DI-1100 USB DAQ Video Playlist
DI-188 Tutorials

The DI-188 USB DAQ Videos and Tutorials.
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.
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)
188 4 ±10 V - 8,000 - 12 - - - -
1100 4 ±10 V - 40,000 - 12 2 In - - -
2108 4 or 8 ±10 V - 160,000 Yes 14 7 Bi Yes Yes Yes
2108-P 4 or 8 B 2108-P 160,000 - 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, 4718B, 4730 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