Particle Impact Noise Detection


  • Computer based controller with predefined MIL-STD test sequences stored (New)
  • Create unlimited custom tests with multiple vibration frequencies and acceleration and other parameters to meet unique requirements (New)
  • Easily store and recall custom test (New)
  • Continuous on screen display of test frequency, vibration level, etc.
  • A custom shaker capable of testing packages up to 5kg/10lbs at 20gs (See BW-LPD-DAQ-4000HD pages)
  • A custom test platen with up to 5 particle detection sensors (New)
  • On screen monitoring of signals created by loose particles
  • On screen indicator signals particle detections
  • Audio monitoring of signals created by loose particles
  • Stops the test when particle noise threshold is exceeded (user selectable)
  • Easily store and recall test results (New)
  • Supports both fully automatic and manual operation modes
  • Sensitivity Test Unit (STU) provided to verify MIL-STD compliance
Auto & Manual Control

Download: BW-LPD-DAQ4000 Brochure

Download PDF: BW-LPD-DAQ4000 User Manual

Download: Install BW-LPD-DAQ4000 Demo Zip File

Download PDF: Upgrade Flyer BW-LPD-D4000 to a New BW-LPD-DAQ4000

Download PDF: Upgrade Flyer – BW-LPD-B2000 to BW-LPD-DAQ4000

Download PDF: Instructions For Returning BW-LPD-DAQ4000 For Calibration Service

Download PDF: Instructions For Returning BW-LPD-D4000 For Calibration Service

Download PDF: Instructions For Returning BW-LPD-B2000 For Calibration Service

The BW-LPD-DAQ4000 is designed to detect loose particles in all kinds of products from your smallest integrated and discrete components, to your largest hybrids and subassembly packages. With speed and accuracy critical to your bottom line, the BW-LPD-DAQ4000 allows you to quickly select your test of choice and begin automatically testing without fiddling with knobs or entering complicated programming steps.

The BW-LPD-DAQ4000 comes preprogrammed to meet or exceed MIL-STD-883 Method 2020 for hybrids and MIL-STD 750 Method 2052 for discrete devices and MIL-STD-202 for relays and switches and stores the results of each test run.

B&W Engineering Corp., the originators of the first fully MIL-STD compliant PIND system, is pleased to introduce the next generation in PIND systems. We are raising the bar, combining the quality and accuracy you expect from B&W Engineering with the ease and flexibility of automated programming never before found in any PIND system.

But we didn’t stop there, we’ve incorporated the largest shaker ever available and a multi-sensor test head to give you the most versatile PIND system ever produced.

See the BW-LPD-DAQ4000HD for up to 10 Lb. payload

Gallery of Particles (Click image to enlarge)


Designed for flexibility and to handle your toughest testing needs, large and small.

  • Programmable – Create, save, and recall test configurations to meet your changing needs
  • Large multi-sensor test head (up to 5)
  • Record, save, and view real-time test data for failure analysis
  • Large shaker capable of handling very large test subjects

    DAQ4000 Test Report


    Newton’s First Law

    Law I: Every body persists in its state of being at rest or of moving uniformly straight forward, except in so far as it is compelled to change its state by forces applied.

    This law states that if the net force (the vector sum of all forces acting on an object) is zero, then the velocity of the object is constant. Mathematically stated:


    •  An object that is at rest will stay at rest unless an unbalanced force acts upon it.
    •  An object that is in motion will not change its velocity unless an unbalanced force acts upon it.

      B&W Engineering Corp. is proud to present the next generation in Particle Impact Noise Detection (PIND). With the advent of economical high performance data acquisition and control products and the PC with their intuitive graphical interface, B&W has developed the most advanced and reliable PIND system available. The ease of use of the BW-LPD-DAQ4000 software and the workhorse reliability of over 30 years of the shaker and sensors, ensure this PIND tester will be on the job for many years.

      Right from the start of PIND testing B&W patented the first MIL-STD compliant system outperforming the competition by over 30% better detection rate as tested by the NBS (now National Institute of Science and Technology) in a well known 1978 study (NBSIR 78-1590 NASA).

      Until now there has been no significant improvement to the PIND test systems. Now the particle (or interference) is recorded in digital format and can be easily recalled for post test analysis. This advancement finally provides the ability to distinguish a particle from other noise that the PIND system has detected. The optional Transient Detector is another failsafe, detecting interference from stray RF and other sources.

      The PC interface can generate test reports with percent defective per with run, serial, part and lot numbers. The many other advantages of a PC control include intuitive operation, unlimited test profiles and mixed frequency tests. The versatile Manual Mode is useful for experiments and can apply a vibration frequency sweep (to find resonances that make particle type noise) and apply shocks simultaneous with or without vibration.

      How does B&W outperform the competition? According to Newton’s 1st law, a body in motion tends to stay in motion and a body at rest tends to stay at rest. B&W designed the optimum PIND system with a patented co-test shock apparatus that truly shocks simultaneously with vibration that keeps the smallest particles moving long enough to be detected and a degaussing magnet to allow detection of ferrous particles that would otherwise be immobilized by the magnetic field of the shaker.

      Unfortunately the MIL-STDs were changed to allow the inferior shock technique of a non-simultaneous shock (“perturbed”), allowing the shaker to stop, shock itself into its stops with a thud and resume vibration. Even the shock duration was changed to a non-standard reference to 50% of amplitude instead of 10% as with all other shock duration measurements. This technique allows smaller particles to re-adhere before the vibration resumes, is more destructive to the device under test by over-stressing it causing micro-cracks, compromising wire bonds and other latent mechanical defects, and ultimately breaks the shaker with costly repairs and downtime.

      The shock is the single most important part of the PIND test to detect the smallest particles. Small particles have a very high resonance frequency, so a high frequency shock is the most effective at knocking them loose while stressing the device under test the least. One PIND manufacturer has made the claim that an isolated test at lower frequency, higher amplitude shock at 40% of device maximum was more effective (if you cannot shock simultaneously). This claim does not agree with facts or physics.

      The highest frequency mechanical shock is generated by impacting harder materials at higher velocities. For the purposes of PIND testing the minimum shock pulse duration possible is about 50 microseconds. The MIL-STD used the < less than requirement intending to minimize the shock duration, there is no such thing as a Zero Time shock except in theory and it would have infinite Amplitude. This duration will extend naturally as mass is added, so the larger package’s response to an identical shock to a smaller mass will be longer commensurate with the mass, material and geometries, creating what is referred to as the Transfer Function.


      Competitor shock 1/2 the frequency & not simultaneous with Vibration


      Mechanical Shock
      Custom Solutions