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U3-LV/U3-HV

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Affordable Multifunction DAQ with USB

U3-LV:

12-bit ADC, 0 to 3.6V Range,

$108.00


U3-HV:

12-bit ADC, -10 to +20V Range,

$114.00


OEM Versions available: ✓

U3-LV (Low Voltage)

  • 16 Flexible I/O (Digital Input, Digital Output, or Analog Input)
  • Up to 2 Timers (Pulse Timing, PWM Output, Quadrature Input, ...)
  • Up to 2 Counters (32-Bits Each)
  • 4 Additional Digital I/O
  • Up to 16 12-bit Analog Inputs (0-2.4 V or 0-3.6 V, SE or Diff.)
  • 2 Analog Outputs (10-Bit, 0-5 volts)
  • Supports SPI, I2C, and Asynchronous Serial Protocols (Master Only)

U3-HV (High Voltage) Differences

  • First 4 Flexible I/O are Changed to Dedicated HV Analog Inputs.
  • 4 HV Inputs have ±10 Volt or -10/+20 Volt Range.
  • 12 LV Inputs (Flexible I/O) Still Available, for 16 Total Analog Inputs.

103
$108.00
104
$114.00

U3 Pricing

LabJack U3-LV  Low Cost USB DAQ Device Picture
Stock: In Stock
Price: $108.00
LabJack U3-HV Low Cost USB DAQ Device Picture
Stock: In Stock
Price: $114.00

U3-LV

U3-HV

Quantity Price
10-29 $99.36
30-99 $90.72
100-499 $82.08
500+ $73.44
Quantity Price
10-29 $104.88
30-99 $95.76
100-499 $86.64
500+ $77.52
LabJack U3-LV-OEM Low Cost USB DAQ Device Picture
Stock: Low Stock
Price: $75.00
LabJack U3-HV-OEM Low Cost USB DAQ Device Picture
Stock: In Stock
Price: $79.00

U3-LV-OEM

U3-HV-OEM

Quantity Price
10-29 $69.00
30-99 $63.00
100-499 $57.00
500+ $51.00
Quantity Price
10-29 $72.68
30-99 $66.36
100-499 $60.04
500+ $53.72

Features:

LV (Low-Voltage) Version:

  • 16 Flexible I/O (Digital Input, Digital Output, or Analog Input)
  • Up to 2 Timers (Pulse Timing, PWM Output, Quadrature Input, ...)
  • Up to 2 Counters (32-Bits Each)
  • 4 Additional Digital I/O
  • Up to 16 12-bit Analog Inputs (0-2.4 V or 0-3.6 V, SE or Diff.)
  • 2 Analog Outputs (10-Bit, 0-5 volts)
  • Supports SPI, I2C, and Asynchronous Serial Protocols (Master Only)
  • Supports Software or Hardware Timed Acquisition
  • Maximum Input Stream Rate of 2.5-50 kHz (Depending on Resolution)
  • Capable of Command/Response Times Less Than 1 Millisecond
  • Built-In Screw Terminals for Some Signals
  • OEM Version Available
  • USB 2.0/1.1 Full Speed Interface
  • Powered by USB Cable
  • Drivers Available for Windows, Linux, Mac and Pocket PC
  • Examples Available for C/C++, VB, LabVIEW, Java, and More
  • Includes USB Cable and Screwdriver
  • Free Firmware Upgrades
  • Money Back Guarantee
  • Enclosure Size Approximately 3" x 4.5" x 1.2" (75mm x 115mm x 30mm)
  • Rated for Industrial Temperature Range (-40 to +85 Degrees C)

HV (High-Voltage) Version:

Same features as the LV version except:

  • First 4 Flexible I/O are Changed to Dedicated HV Analog Inputs.
  • 4 HV Inputs have ±10 Volt or -10/+20 Volt Range.
  • 12 LV Inputs (Flexible I/O) Still Available, for 16 Total Analog Inputs.

Flexible I/O:

The first 16 I/O lines (FIO and EIO ports) on the LabJack U3-LV can be individually configured as digital input, digital output, or analog input. In addition, up to 2 of these lines can be configured as timers, and up to 2 of these lines can be configured as counters. On the U3-HV, the first 4 flexible I/O are replaced with dedicated high-voltage analog inputs.

The first 8 flexible I/O lines (FIO0-FIO7) appear on built-in screw terminals. The other 8 flexible I/O lines (EIO0-EIO7) are available on the DB15 connector.

For more information about the flexible I/O see Section 2.5 of the User's Guide. For data rate information see Section 3.1. The User's Guide can be found on the U3 Support page.

Analog Inputs:

The LabJack U3 has up to 16 analog inputs available on the flexible I/O lines. Single-ended measurements can be taken of any line compared to ground, or differential measurements can be taken of any line to any other line.

Analog input resolution is 12-bits. The range of single-ended low-voltage analog inputs on the U3-LV is typically 0-2.4 volts or 0-3.6 volts, and the range of differential analog inputs is typically ±2.4 volts (pseudobipolar only). For valid measurements, the voltage on every analog input pin, with respect to ground, must be within -0.3 to +3.6 volts.

On the U3-HV, the first 4 flexible I/O are replaced with dedicated high-voltage analog inputs. The input range of these channels is ±10 volts or -10/+20 volts. The remaining 12 flexible I/O are still available as described above, so the U3-HV has 4 high-voltage analog inputs and up to 12 low-voltage analog inputs.

Command/response (software timed) analog input reads typically take 0.6-4.0 ms depending on number of channels and communication configuration. Hardware timed input streaming has a maximum rate that varies with resolution from 2.5 ksamples/s at 12-bits to 50 ksamples/s at about 10-bits.

For more information about the analog inputs see Section 2.6 and Appendix A of the User's Guide. For data rate information see Sections 3.1 and Sections 3.2. The User's Guide can be found on the U3 Support page.

Analog Outputs:

The LabJack U3 has 2 analog outputs (DAC0 and DAC1) that are available on the screw terminals. Each analog output can be set to a voltage between 0 and 5 volts with 10-bits of resolution.

The analog outputs are updated in command/response mode, with a typical update time of 0.6-4.0 ms depending on communication configuration. The analog outputs have filters with a 3 dB cutoff around 16 Hz, limiting the frequency of output waveforms to less than that.

For more information about the analog outputs see Section 2.7 and Appendix A of the User's Guide. For data rate information see Section 3.1. The User's Guide can be found on the U3 Support page.

Digital I/O:

The LabJack U3 has up to 20 digital I/O channels. 16 are available from the flexible I/O lines, and 4 dedicated digital I/O (CIO0-CIO3) are available on the DB15 connector. Each digital line can be individually configured as input, output-high, or output-low. The digital I/O use 3.3 volt logic and are 5 volt tolerant.

Command/response (software timed) reads/writes typically take 0.6-4.0 ms depending on communication configuration. The first 16 digital inputs can also be read in a hardware timed input stream where all 16 inputs count as a single stream channel.

For more information about the digital I/O see Section 2.8 and Appendix A of the User's Guide. For data rate information see Sections 3.1 and 3.2. The User's Guide can be found on the U3 Support page.

Timers:

Up to 2 flexible I/O lines can be configured as timers. The timers are very flexible, providing options such as PWM output, pulse/period timing, pulse counting, and quadrature input.

For more information about the timers see Section 2.9 and Appendix A of the User's Guide. The User's Guide can be found on the U3 Support page.

Counters:

Up to 2 flexible I/O lines can be configured as 32-bit counters.

For more information about the counters see Section 2.9 and Appendix A of the User's Guide. The User's Guide can be found on the U3 Support page.

I/O Protection:

All I/O lines on the U3 are protected against minor overvoltages. The FIO lines can withstand continuous voltages of up to ±10 volts, while the EIO/CIO lines withstand continuous voltages of up to ±6 volts.

High Channel Count Applications:

By using USB hubs, many LabJacks can be interfaced to a single PC, providing an inexpensive solution for high channel count applications.

OEM Version:

The U3-LV-OEM or U3-HV-OEM includes the board only without the enclosure and without most through-hole components. See Section 2.12 of the U3 User's Guide for more information.

Optional Accessories:

The CB15 is a simple screw terminal breakout for the DB15 connector.

The RB12 provides a convenient interface for the U3 to industry standard digital I/O modules, allowing electricians, engineers, and other qualified individuals, to interface a LabJack with high voltages/currents. The RB12 relay board connects to the DB15 connector on the LabJack, using the 12 EIO/CIO lines to control up to 12 I/O modules. Output or input types of digital I/O modules can be used. The RB12 is designed to accept G4 series digital I/O modules from Opto22, and compatible modules from other manufacturers such as the G5 series from Grayhill. Output modules are available with voltage ratings up to 200 VDC or 280 VAC, and current ratings up to 3.5 amps.

The LJTick-Divider (LJTD) signal-conditioning module is designed to divide 2 single-ended higher voltage analog signals down to 0-2.5 volt signals.

The LJTick-DAC (LJTDAC) provides a pair of 14-bit analog outputs with a range of ±10 volts. Plugs into any digital I/O block, and thus up to 10 of these can be used per device to add 20 analog outputs.

The LJTick-InAmp (LJTIA) signal-conditioning module provides two instrumentation amplifiers ideal for low-level signals such as bridge circuits (e.g. strain gauges) and thermocouples. Each amplifier converts a differential input to single-ended.

The LJTick-RelayDriver (LJTRD) allows 2 digital I/O lines to each control a relay or other moderate load up to 50V/200mA.

The LJTick-CurrentShunt (LJTCS) signal-conditioning module is designed to convert a 4-20 mA current loop input signal into a 0.47-2.36 volt signal.

The LJTick-Proto (LJTP) consists of an 8x8 grid of holes for prototyping custom signal-conditioning modules.

Satisfaction Guaranteed:

Everything we sell has a 30-day money back guarantee. If, for any reason, you are not satisfied with a product, contact us to arrange your choice of a refund or replacement. In addition, the LabJack U3 is covered by a 1-year limited warranty.

Technical Support:

All LabJacks include lifetime technical support. Support resources include forum, FAQs, email, and telephone.

Drivers and Examples:

The U3 support page has drivers and sample code. We have drivers for the three major operating systems, and examples for most common programming languages.

Need more information?

The User's Guide on U3 Support page has all the specifics for working with the U3. You'll also find the quick start guides, and any other literature we've published on the U3.

Firmware:

Be sure to keep an eye on the U3 Firmware page for the latest U3 firmware.

Getting Started

Please visit the U3 Support Homepage to get started.

UD Series Software Options

  • Sample Applications:  All free.  LJControlPanel (part of the normal Windows installation) has a test panel where you can view all inputs and manually control all outputs.  LJLogUD collects analog input data in command/response mode (generally 100 Hz or slower), displays it on screen, and writes it to file.  LJStreamUD collects analog input data in stream mode (generally 10 Hz or faster), displays it on screen, and writes it to file.  Both applications are free.
  • Programming:  All free.  If you know any language we probably support it.  This includes C, C++, C#, Delphi, Java, LabVIEW, LabWindows/CVI, MATLAB, Python, and Visual Basic (VB6/VB.NET).  Start on our UD Series Programming page.
  • DAQFactory:  Free and paid versions.  DAQFactory is measurement and automation software from Azeotech, that allows non-programmers to make custom applications.  Start on our DAQFactory page.

Download LJUD Library

U6/U3/UE9 Devices

U6 U3 UE9

Windows details
Windows Installer 49.9 MB 2014-05-21 15:24

This is the installation package for Windows for the U3, U6, UE9, T7 and Digit. It supports both 32-bit and 64-bit versions of Windows XP, Windows Vista, Windows 7 and Windows 8. All high-level functions within the UD and LJM libraries will be available through this installation. Example code using these libraries can be downloaded according to language in the programming section.

This installation includes the driver, libraries, documentation, and utility applications listed below

Utility Applications
  • LJControlPanel 2.32 - Simple configuration and testing utility for the U3/U6/UE9
  • LJSelfUpgrade 1.30 - Updates firmware on the U3/U6/UE9
  • LJLogUD 1.17 - Logging program up to 10 Hz for the U3/U6/UE9
  • LJStreamUD 1.17 - Logging program up to 80,000 Hz for the U3/U6/UE9
  • LJLogM 1.02 - Logging program up to 10 Hz for the T7
  • LJStreamM 1.03 - Logging program up to 80,000 Hz for the T7
  • Kipling 1.00.12 - Basic configuration and testing application for the T7
  • Otero 1.41 - Configuration and downloader for the Digit series loggers
Code Libraries
  • LJM Library 1.03.00 - Library of high-level code functions for the T7/Digit
  • LJM Constants 2014.02.20 - JSON constants file for the LJM library
  • UD Library 3.42 - Library of high-level code functions for the U3/U6/UE9
Low-level Driver
  • LabJackWinUSB Driver X.XX - Driver for Windows USB communication to and from all LabJack devices

Tip: Uninstall previous versions before installing new versions. If a LabJack is connected during installation, unconnect and reconnect when done.

The normal ways of uninstalling previous versions of the package are:

  1. Do Start => Programs => LabJack => Uninstall.
  2. Go to Windows Control Panel (not LJControlPanel), then go to Add/Remove Programs, then find "LabJack" or "LabJackUD".

Here are the alternative manual steps:

  • Go to Start => Programs, find the LabJack group, right-click on it, and delete from the start menu.
  • On your hard drive delete the LabJack folder which is usually in "C:\Program Files\" or "C:\Program Files (x86)\"
  • Find and delete labjackud.dll in your system directory (i.e. "C:\windows\system32\" or "C:\windows\SysWOW64\").

Barebones: A driver-only version of the installer can be found here.

Mac OS X details
Mac OS X Package 188.37 KB 2013-05-01 14:31

This is the installation package for Mac OS X for the U3, U6, UE9. It is a native USB driver, so only low-level functions can be used. Low-level functions are documented per device in the low-level section of their datasheet. This installation does not include any utility applications.

Low-level Driver
  • Exodriver X.XX - Driver for Mac and Linux USB communication to and from all LabJack devices

Installation guide with demonstration and driver source code here.


Linux details
Linux Package 127.49 KB 2014-04-02 17:33

This is the installation package for Linux for the U3, U6, UE9. It is a native USB driver, so only low-level functions can be used. Low-level functions are documented per device in the low-level section of their datasheet. This installation does not include any utility applications.

Low-level Driver
  • Exodriver X.XX - Driver for Mac and Linux USB communication to and from all LabJack devices

Installation guide with demonstration code here.

Quick Links

Getting Started

Please visit the U3 Support Homepage to get started.

Quick Links

  • U3 Users Guide - Find the most applicable section here, and post a comment.
  • UD Library User's Guide - Library/Driver/SDK/API for the U3 on Windows.
  • Search - Try using the search box on every page.  It works.
  • App Notes - In-depth detail on various DAQ topics.
  • Forum - Search for answers and post a new topic.
  • Contact Support - Fast email responses.  You can even call us for free, if that is preferred.

Updates

Compatible Accessories and Sensors

LabJack CB15 Device Picture
$29.00
$29.00
$49.00
EI1040
$109.00
$69.00
IDCA-10
$110.00
LJTick-CurrentShunt
$39.00
LabJack LJTick-DAC Device Picture
$79.00
LJTD
$25.00
LJTick-InAmp
$59.00
LJTick-Proto
$10.00
$12.00
LM34CAZ Silicon Temperature Sensor
$12.00
$79.00
$119.00
TKAD DIN Rail Mounting Clip
$5.00

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