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330-668-1444Model DI-2008
Expandable to 128 channels Thermocouple and Voltage DAQ and Data Logger System, 8 High Common Mode Isolated Analog Inputs, ±50 V, 16-bit Resolution, 200Hz, 7 D I/O, Free WinDaq Software
Why is high common mode important?
Select Channels:
- Includes a DI-2008 instrument, a 6-foot USB cable, a screwdriver for signal connections, an NIST-traceable calibration certificate, and downloadable WinDaq software
Bundle and Save- Need trigger modes or to stream data directly to Excel? Please consider DI-2008XL, which featureas
- Powerful trigger methods
- Full speed streaming in both WinDaq and Excel
- Support both 32- and 64- bit Microsoft Excel
- Need standalone operation and web interface? Please consider DI-808, which features
- Built-in web server works with Any device, from Any where, Anytime
- Programable alarm output
- Flexible trigger Selections
- Record to servers, USB drives, and internal memory
- Need more channels? ChannelStretch™ channel expansion to 128 analog and 112 digital channels (synchronization only available with other DI-2008 units - Unlock code required per device - see Accessories)
- Eight differential and isolated analog input channels.
- Seven bi-directional digital input ports, including:
- Counter input for totalizing applications
- Rate input for frequency/flow/rpm applications
- Counter input is capable to capture frequency up to 2Mhz!
- Programmable voltage and thermocouple measurements per channel
- 10 mV to 50 V in 12 steps
- Type J, K, T, B, R, S, E, N thermocouples
- High resolution (16-bit) measurements (use the Resolution Calculator to determine how small a change you can detect)
- 2000 Hz sample throughput for a single channel and 200 Hz for two or more
- 15V (1W) supply output for 4-20mA sensors
- Included WinDaq software for ready-to-run measurements
- Use HMP60 Probe for Humidity Measurements
- Fully documented device protocol supports other operating systems
- 10% Education Discount
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Description
DI-2008 USB Thermocouple Data Acquisition system with Windaq software. Features 4 or 8 analog input channels programmable as a thermocouple or voltage input, 16-bit measurement resolution, and a full scale range of ±10mV to ±50V for voltage measurements or Thermocouple types J, K, T, B, R, S, E, or N. Includes a DI-2008 instrument, a 6-foot USB cable, a screwdriver for signal connections, an NIST-traceable calibration certificate, and downloadable WinDaq software
Eight analog input channels adapt to a wide range of measurement types and applications. Each channel can be independently programmed for a thermocouple or voltage measurement. Programmed as a voltage channel you can select one of twelve measurement ranges from ±10 mV to ±50 V. A range of ±5 V supports 4-20 mA measurements using typically a 250 Ω shunt resistor (model R250 sold separately). Programmed as a thermocouple channel you can select from eight thermocouple types: J, K, T, B, R, S, E, or N. Linearization and junction compensation are automatically applied by the DI-2008 for the selected TC type to deliver values scaled in either °C or °F. Rounding out the DI-2008, a built-in 15 V sensor excitation power supply simplifies external wiring and further reduces overall system cost. Finally, all analog measurements benefit from a 16-bit ADC resolution to reveal even the smallest signal variations. Virtually any measurement will experience a difference in ground potential between the instrument, the signal source, and even between signal sources. Known as common mode voltages, they cause noisy measurements in the best case or damage to the instrument in the worst case unless it’s specifically designed to tolerate them like the DI-2008. Each DI-2008 analog input is electrically isolated from other channels and from ground for safe and accurate measurements in the presence of common mode voltages. Channel isolation means that each analog input is free to float to an independent common mode voltage imposed upon it by the signal source up to 120 V rms, and still provide an accurate and noise-free measurement.
The DI-2008 provides 7 digital ports, each configurable as an input or a switch. Input protection is provided to 30 V. Configured as a switch a digital port can be used to control external loads up to 30 V @ 100 mA, and the switch can be controlled asynchronously without interrupting the scanning process. When activated as inputs two ports allow dual functionality to be used as discrete inputs, or one as a counter and the other a rate input. The rate input features a 50 kHz maximum measurement allocated over twelve programmable measure-ment 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 mea-suring engine speed allows rpm data to be acquired synchronously with analog data.
Accessories
Description
Unlocks WinDaq for ChannelStretch™ capability allowing you to record synchronous data with multiple DI-2008 units (only DI-2008 units can synchronize with the DI-2008). 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.
Description
Unlocks WinDaq ExcelLink to capture and streaming WinDaq data to any version of Microsoft Excel spreadsheet directly. No programming is needed. Compatible with ChannelStrech operation. Unlock Code required for each device.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.
Description
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
Description
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.
Description
Ferrite choke reduces interference for USB-based data acquisition products.
Description
16-ft USB Extension Cable. USB 2.0 Type A. Daisy chain up to 5 cables for extended length.
Description
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.
Description
AC/DC Current Clamp includes 9V battery and user manual. Download the DataSheet (pdf) to learn more or go to the product page.
Description
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).
Description
3-foot (0.91m) type K beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
12-foot (3.66m) type K beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
3-foot (0.91m) type T (best for low temperature applications) beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
12-foot (3.66m) type T (best for low temperature applications) beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
3-foot (0.91m) type J beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
12-foot (3.66m) type J beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor.
Description
Custom length (over 12 feet) type K beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor. Please Note: Enter quantity for length. Please allow 7-10 business days for manufacturing.
Description
Custom length (over 12 feet) type T (best for low temperature applications) beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor. Please Note: Enter quantity for length. Please allow 7-10 business days for manufacturing.
Description
Custom length (over 12 feet) type J beaded wire teflon-coated thermocouple. Maximum operating temperature of 500°F (260°C) on the coating of the wires. 24-Gauge teflon wrap for use in moist atmospheres. Insulation provides a seal against liquid and vapor. Please Note: Enter quantity for length. Please allow 7-10 business days for manufacturing.
50-500mm Thermowells
8mm diameter, 50-500mm length, 1/2" MNTP, stainless thermowells with cable gland to protect your thermocouples
Description
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.
Description
Allows you to power 5V rating sensor with a battery. Input voltage: DC8-35V, (12V/24V changes to 5V); Output parameter: DC5V 3A, 15W MAX
Description
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, compatible with DI-2008, DI-4108M, DI-4208M and DI-808. Made with 316 stainless steel and high temperature auto-graded plastic. 0.5% accuracy. 4-20mA linear current output.
Description
2000361-H High precision pressure sensor measures PSI ranges of -14.5 to 10000 PSI dependant on model. Requires 101087-1 DC/DC Converter to be used with DI-808, DI-2008, DI-4108M and DI-4208M. Made with 316 stainless steel and high temperature auto-graded plastic. 0.5% accuracy. 0.5V – 4.5V linear voltage output.
Description
Re-calibration Service, this calibration certificate is included with new instruments. NIST-traceable certificate for model DI-2008 Thermocouple and Voltage data acquisition product. Includes before and after data. Shipping charges do apply when ordering online. Learn more about Calibrating your device.
Software
WinDaq
Data Acquisition Recording and Playback Software
Included FREE with your DI-2008 purchase. Record all channels at 2,000 S/s for a single analog channel or 200 S/s for more than one analog channel. Installs drivers and WinDaq recording and playback software. Unlock code required for ChannelStretch™.
Description
Unlocks WinDaq ExcelLink to capture and streaming WinDaq data to any version of Microsoft Excel spreadsheet directly. No programming is needed. Compatible with ChannelStrech operation. Unlock Code required for each device.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.
WinDaq Add-ons and Utilities
Library
Library of add-on packages for WinDaq Software, such as live XY plot, FFT, Spectrogram, Meter, Gauge, Alarm, etc.
Drivers
Drivers only Download
Installs drivers for all contemporary data acquisition hardware products that support WinDaq software.
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.
MATLAB Example Program
Program in Protocol Level
Learn how to program with MATLAB® in protocol level. Does not require MathWorks' Data Acquisition Toolbox.
LabView Example Programs
Available on GitHub
FREE LabView example programs using the Dataq's ActiveX Controls and the DI-2008. All sample programs are well-commented to help you get up and running quickly.
Frequently Asked Questions
Can I save data in Microsoft Excel format?
Data can be streamed to Microsoft Excel using WinDaq/ExcelLink. Data can also be exported to Excel after acquisition using WinDaq Waveform Browser. See How to Import Recorded Data to Excel.
Can I increase the accuracy of thermocouple readings?
To increase the accuracy of thermocouple reading, please follow this steps
Can I program it under Matlab in protocol level?
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-2008. 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-2008 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-808.
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?
The DI-2008 is specifically designed to measure and record thermcouple temperature measurements as well as voltage measurements.
Is the DI-2008 Isolated?
Each DI-2008 analog input is electrically isolated from other channels and from ground for safe and accurate measurements in the presence of common mode voltages. Channel isolation means that each analog input is free to float to an independent common mode voltage imposed upon it by the signal source up to 120 V rms, and still provide an accurate and noise-free measurement.
Is software included with the device?
WinDaq Data Acquisition and Playback Software is included free.
Where do I download the software?
Download software at https://www.dataq.com/support/downloads/DATAQ-Software-Suite-Web-Setup.exe.
How do I unlock my device?
If you purchase an unlock code when you order a DI-2008, 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 (https://www.dataq.com/resources/pdfs/manuals/di-2008-usb-voltage-thermocouple-daq.pdf - Chapter 5, "Unlock WinDaq").
Does the DI-2008 include a calibration certificate?
All new DI-2008 instruments ship with an NIST-traceable calibration certificate.
Can I get the DI-2008 re-calibrated?
Recalibration service is available and can be ordered online.
How often should I get the DI-2008 re-calibrated?
The DI-2008 should be re-calibrated annually.
Can I program this device in Python, C#?
The published protocol of the DI-2008 is available for programming in any language. View our GitHub page for example programs.
Is my sensor compatible with this device?
Maybe. The many gain factors and voltage ranges available on the DI-2008 allow for many sensors to be compatible with the device. 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 sales@dataq.com.
Does the DI-2008 include digital or analog output channels?
The DI-2008 has seven bi-directional digital ports.
My sensor requires a power source, can the DI-2008 provide that power?
Yes. The DI-2008 can provide +15V power by connecting the appropriate wire to the +15V pin. Be sure your sensor does not exceed the excitation output spec: +15 V dc (-7.5% to +2.5%) at 70% load (47 mA), 67 mA at full load.
Specifications
| Analog Inputs | ||||||||||||||||||||||||||||
| Number of Channels: | 8 | |||||||||||||||||||||||||||
| Configuration: | Differential, Isolated | |||||||||||||||||||||||||||
| Programmable measurements per channel: | Voltage, Thermocouple | |||||||||||||||||||||||||||
| Programmable thermocouple types and measurement range per channel: Over 25 ±5 °C ambient temperature range. Stable ambient temperature. Following 30 minutes warm-up. Excluding common mode error. Excluding thermocouple error. |
To increase the accuracy of thermocouple reading, please follow this steps
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| Programmable voltage measurement ranges per channel: | ±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 | |||||||||||||||||||||||||||
| Voltage measurement accuracy: At 25 °C ambient temperature. Following 30 minutes warm-up. Excluding common mode error. |
±(0.05% of range + 10 µV) | |||||||||||||||||||||||||||
| Input impedance: | 1 MΩ, all ranges | |||||||||||||||||||||||||||
| Isolation: | 350Vpp, Input-to-output, Channel-to-channel | |||||||||||||||||||||||||||
| Absolute maximum input without damage: | 120 V rms | |||||||||||||||||||||||||||
| Maximum common mode voltage: | 120 V rms | |||||||||||||||||||||||||||
| Min common mode rejection (330Ω unbalance): | >100 dB (DC to 60 Hz) | |||||||||||||||||||||||||||
| Channel-to-channel crosstalk rejection: (Rsource ≤ 330 Ω; Freqsource ≤ 60 Hz) | > 100 dB at any throughput | |||||||||||||||||||||||||||
| Digital Inputs | ||||||||||||||||||||||||||||
| Number of ports: | 7 | |||||||||||||||||||||||||||
| Type: | MOSFET switch | |||||||||||||||||||||||||||
| Configuration: | Programmable as an input or switch | |||||||||||||||||||||||||||
| Pull-up value: | 4.7 KΩ | |||||||||||||||||||||||||||
| Isolation: | None | |||||||||||||||||||||||||||
| Input high voltage threshold: | 2.4 V minimum | |||||||||||||||||||||||||||
| Input low voltage threshold: | 0.8 V maximum | |||||||||||||||||||||||||||
| Absolute max input without damage: | 0 ≤ V ≤ 30 V | |||||||||||||||||||||||||||
| Count/Rate | ||||||||||||||||||||||||||||
| Digital port assignment: | Count: Port 2 configured as input Rate: Port 3 configured as input |
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| 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 | |||||||||||||||||||||||||||
| Minimum rate frequency: | 0.5 Hz | |||||||||||||||||||||||||||
| Maximum count frequency: | 50 kHz | |||||||||||||||||||||||||||
| Power | ||||||||||||||||||||||||||||
| Power Consumption: | 0.75 Watts (from USB port) | |||||||||||||||||||||||||||
| Excitation output: | +15 V dc (-7.5% to +2.5%) at 70% load (47 mA), 67 mA at full load, or max three 4-20mA sensors | |||||||||||||||||||||||||||
| ADC Characteristics | ||||||||||||||||||||||||||||
| Voltage Measurement Resolution: |
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| Thermocouple Temperature Measurement Resolution: |
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| 4-20 mA current loop resolution: | 13,100 ADC counts over the 4-20 mA range (5 VFS range with 250-Ω shunt resistor) | |||||||||||||||||||||||||||
| Maximum sample throughput rate: | Single enabled channel: 2,000 S/s Two or more enabled channels: 200 S/s |
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| Minimum sample throughput (hardware): | 1 enabled analog channel: 0.000109 S/s 2 or more enabled analog channels: 0.000011 S/s |
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| Minimum sample throughput (using WinDaq): | .0001969 S/s | |||||||||||||||||||||||||||
| Sample rate timing accuracy: | 50 ppm | |||||||||||||||||||||||||||
| Indicators and Connections | ||||||||||||||||||||||||||||
| Interface: | USB 2.0 (mini-B style connector) | |||||||||||||||||||||||||||
| Indicator lights: | 3 LEDs: Power, Active, Event | |||||||||||||||||||||||||||
| Input Connections: | Two 16-position terminal strips | |||||||||||||||||||||||||||
| Pushbutton: | Manual event when used with WinDaq software | |||||||||||||||||||||||||||
| ChannelStretch™ Operation | ||||||||||||||||||||||||||||
| WinDaq software: | If any synced device has two or more enabled analog channels, all synced devices must enable the same number of analog and digital channels and the same sample throughput rate. If all synced devices have one or zero enabled analog channels, sample rate per channel must be the same across all devices. One or more digital ports configured as a discrete input counts as one digital channel. Rate and count inputs count as one digital channel each. | |||||||||||||||||||||||||||
| Programmed (.Net- or protocol-based): | Sample rate per channel must be the same across all synced devices. | |||||||||||||||||||||||||||
| Maximum number of devices: | 16 | Maximum channel count: | 128 analog, 112 digital | |||||||||||||||||||||||||
| Maximum supported throughput: | ≥480 kHz | |||||||||||||||||||||||||||
| Synchronization compatibility: | DI-2008 | |||||||||||||||||||||||||||
| PC USB prerequisite: | All instruments must be connected to the same USB controller. The use of USB hubs are recommended to meet this requirement. | |||||||||||||||||||||||||||
| Environmental | ||||||||||||||||||||||||||||
| Operating Temperature: | 0 to 70 °C | |||||||||||||||||||||||||||
| Storage Temperature: | -20 to 70 °C | |||||||||||||||||||||||||||
| Storage Humidity: | 0 to 90% non-condensing | |||||||||||||||||||||||||||
| Physical Characteristics | ||||||||||||||||||||||||||||
| Enclosure: | Hardened Plastic | |||||||||||||||||||||||||||
| 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 | |||||||||||||||||||||||||||
Articles
How to Acquire Flow Rate and Flow Volume using a DATAQ Data Logger
Making Parallel Thermocouple Measurements
Sub-zero Thermocouple Measurements
How To Make 4-20 mA Current Loop Measurements
Why You Need Channel-to-Channel Isolation
How To Calculate Common Mode Rejection Ratio
Intelligent Oversampling Methods Extend Measurement Flexibility
Active USB Extension Cables Limit Data Loss
Videos
Pressure Measurements
Learn how to make pressure Measurements with a pressure sensor and Dataq products.
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Quick Product Comparison
| Model | Analog channels |
Expandable* | Measurement Range |
Thermocouple Support |
Max Sample Rate (Hz) |
ADC Resolution |
Digital I/O |
Interface | Data Storage | Price |
| DI-2008 | 4 or 8 | Yes | A† | Yes | 200 | 16 | 7 Bi | USB | PC | $399 |
| DI-808 | 8 | - | A† | Yes | 40 | 16 | 4 In 4 Out | Ethernet | Internal, USB flash, Cloud | $995 |
| DI-4718B-U | 8 | - | C† | Yes (DI-8B) | 160,000 | 12 to 16 | 2 In | USB | PC or USB flash | $795 |
| DI-4718B-E | 8 | - | C† | Yes (DI-8B) | 160,000 | 12 to 16 | 2 In | USB, Ethernet | PC or USB flash | $695 |
| GL240 | 10 | - | B† | Yes | 100 | 16 | 4 In 4 Out | USB, Ethernet | PC, USB flash, Internal, Cloud | $995 |
| GL840-M | 20 | Yes | B† | Yes | 100 | 16 | 4 In 4 Out | USB, Ethernet | PC, USB flash, Internal, Cloud | $2345 |
| DI-718B-US | 8 | - | C† | Yes (DI-8B) | 14,400 | 14 | 2 In | USB | PC or SD Card | $695 |
| DI-718B-ES | 8 | - | C† | Yes (DI-8B) | 14,400 | 14 | 2 In | Ethernet | PC or SD Card | $895 |
*Expansion capabilities dependent on model.
†Use the following chart to determine Measurement Ranges:
| A | B | C* |
| ±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 TC-J TC-K TC-T TC-B TC-R TC-S TC-E TC-N |
±20 mV ±50 mV ±100 mV ±200 mV ±500 mV ±1 V ±2 V ±5 V ±10 V ±20 V ±50 V ±100 V 1-5 V |
±10 mV ±50 mV ±100 mV ±1 V ±5 V ±10 V ±20 V ±40 V ±60 V |
*Dependent on 8B module.