National Instrument DAQ System in Nepal.

National Instrument DAQ System in Nepal.

DAQ is the process of measuring an electrical or physical phenomenon, such as voltage, current, temperature, pressure, or sound. A DAQ system consists of sensors, DAQ measurement hardware, and a computer with programmable software.

Every data acquisition task has its own set of requirements. To help meet your unique needs, NI products range from plug-and-play DAQ devices for fixed and repeatable measurements, to scalable and flexible modular DAQ systems. Our versatile driver is extended by NI data acquisition-specific software and supports third-party programming languages.

With any project or experiment that you undertake, the data that it produces will ultimately determine the fruits of your labor. Without data, we wouldn’t be able to understand how a system actually performs.

For example, if you want to set up a heating coil that can help the object to reach a specific temperature, you cannot understand its level of success without measuring the temperature. A simple task as measuring and recording the temperature is as Data Acq uisition. Another example is measuring and recording the current difference across a resistor.

In essence, data acquisition is a process that involves collecting information to understand the electrical or physical phenomenon using sensors, measurement device, and a computer. Together, these components form a Data Acquisition System or DAQ System.

NI myDAQ data acquisition (DAQ) device NI myDAQ () is also a low-cost DAQ device, students can measure and analyze live signals and it is compact and portable so students are able to extend their understanding how to use industry-standard tools and methods. NI myDAQ is a compact USB device, provides two analog inputs (AI) for ±10 V signals 200 kS/s per channel, two analog outputs (AO), eight digital input and output (DIO), audio, power supplies, and digital multimeter (DMM) functions. Anyone can start to use these devices even without any previous expertise in LabVIEW programming. First approach using Measurement and Automation Explorer (MAX) is the easiest way. Beginners can experience how to communicate with a device, how to send and acquire measurement data.

National Instruments USB-6341 Multifunction I/O Device 

The NI USB-6341 (Part Numbers: 781438-01 and 782251-01) is an X Series Multifunction I/O Device from National Instrument. The USB X Series 6341 has 16 Analog Input Channels and 16 bits ADC resolution. Part number 781438-01 has a screw terminal front connector, while part number 782251-01 has a BNC front connector. The maximum sample rate is 500 kS/s. This device offers the timing resolution of 10 ns. The timing accuracy of this device is 50 ppm. This device provides DC input coupling.

The USB-6341 NI has a variety of input ranges: ±0.2 V, ±1 V, ±5 V, and ±10 V. This device also offers ±11 V of working voltage. The value of ratio rejection of the common mode is 100 dB. The NI USB-6341 X Series DAQ offers an input impedance of 10 GΩ when the device is on and 1,200 Ω when the device is off. The input impedance is in parallel with 100 pF in both cases.

The USB-6341 X Series deviceprovides an input bias current. The value of the input bias current is ±100 pA. The frequency of the crosstalk feature is 100 kHz. The adjacent channels to crosstalk have a value of -75 dB. The non-adjacent channels have a value of -90 dB. The small signal bandwidth has a maximum value of 1.2 MHz. This Multifunction I/O Device has a scan list memory of 4,095 entries. The size of the input current is ±20 mA. This is the amount of current when there is an overvoltage malfunction. The NI USB-6341 provides protection against this overvoltage malfunction.

National Instruments cDAQ-9189 CompactDAQ Chassis

The cDAQ-9189 (Part Numbers: 785065-01 and 785065-02) CompactDAQ Chassis comes with parallel advanced output modules (in the past known as equipment coordinated modules), which can be used with various programming coordinated errands on a solitary module. On serial computerized yield modules, the user cannot blend equipment planned and programming coordinated undertakings, but rather they can run various programming coordinated errands. The user can empower a programmable debouncing channel on each PFI signal. When the channel is empowered, the case tests the contributions with a client arranged Filter Clock from the time-base undercarriage.

In edge checking applications, the counter depends on its Source after the counter is outfitted. The user can design the counter to tally rising or falling edges on its Source input. The user can also control the heading of counting (up or down), as portrayed in the Controlling the Direction of Counting segment. The counter qualities ​​can be perused on request or with an example clock. With buffered edge checking (edge ​​counting utilizing an example clock), the counter tallies the quantity of edges on the Source contribution after the counter is outfitted. The estimation of the counter is tested on every dynamic edge of an example check and put away in the FIFO. The STC3 exchanges the inspected esteems ​​to have memory utilizing a fast information stream. With single pulse width estimation, the counter tallies the quantity of edges on the Source input while the Gate input stays dynamic. When the Gate input goes idle, the counter stores the tally in the FIFO and overlooks different edges on the Gate and Source inputs.

CompactDAQ systems collect and deliver the data validation you need to meet test requirements at any distance, in any environment. These portable, customizable solutions—made of data acquisition modules that can synchronize measurements across a network—help you digitize data closer to sensors, minimizing noise and simplifying cabling in the field.

CompactDAQ is a cost-effective approach to benchtop measurement. Pair sensor-specific, conditioned I/O modules with software optimized for DAQ applications.

Best for

  • High-channel-count distributed DAQ applications 
  • Benchtop test and measurement 
  • Mixed sensor measurements 

CompactDAQ System Components


Built for accurate, conditioned measurements, you can use CompactDAQ chassis to perform mixed-measurement data acquisition all within one synchronized I/O system. CompactDAQ chassis feature USB or Ethernet connectivity and are available with different slot counts to provide the right amount of I/O for various applications. You can pair your system with the right software to customize how you acquire, analyze, present, and manage your measurement data.


The CompactDAQ controller is a rugged, reliable, high-performance integrated controller with industry-standard certifications. It’s ideal for performing waveform acquisition and inline software analysis while logging data to onboard or removable SD memory. The controller also offers a wide array of standard connectivity and expansion options, such as USB, Ethernet, CAN/LIN, and RS232 serial.


With more than 60 C Series I/O modules for nearly any sensor type, quickly design a custom hardware setup optimized for size, cost, and performance. C Series modules are high-quality input and output modules that provide signal conditioning and analog-to-digital conversion for your CompactDAQ system. These hot-swappable modules plug directly into your chassis, making it simple to build a system tailored for your specific test requirements.


From interactively capturing and exploring your data to programming a fully automated measurement system, seamless software integration lets you tailor tests to your needs. We designed CompactDAQ to work with DAQExpress™, FlexLogger™ software, and programming environments such as LabVIEW to help you meet development requirements and spend your time on what matters most. Since CompactDAQ hardware also uses the powerful NI-DAQmx driver, you can program it with the language of your choice.


From the moment you unbox your hardware, through deployment and life-cycle maintenance, NI is here to help you get started quickly and operate efficiently.

Overcome your challenges with:

  • Repair Services
  • Life-Cycle Services 
  • Configuration
  • Calibration 

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