Weighing Indicator

New and improved! Perfect compatibility with AD-4401


Perfect compatibility with AD-4401

  • The size, color, method of operation and installing to a control panel of the AD-4401A remains the same as the AD-4401.
  • Interface connectors retain compatibility so even when updating from AD-4401 to AD-4401A previously connected devices can continue to
    be used without changing any connectors.
  • Functions have been added but the default settings remain identical to the AD-4401.

Brochure | Manual Book
Simplified manual



  • Powerful vibration-cancelling filter (High Performance Digital Filter)
  • 100 times/sec. High speed sampling
  • Up to 1 million counts of A/D resolution
  • Monitor & control weighing and batching with external or internal resolution
  • Fuzzy and Automatic Free Fall Compensation for consistently accurate batching results
  • Enter control set points through front keys or remotely though external thumb wheels
  • Automatic weight and/or count accumulation
  • Sub display provides feedback on all set points & simplifies calibration
  • Supplementary flow function assures accurate performance on each batch
  • A host of communications capabilities
  • RS-232C, RS-422/485, BCD, analog output and standard 4-20mA Current Loop
  • Connect up to 10 AD-4401’s with A&D’s RS-422/485
  • Compact DIN size housing speeds installation & reduces space
  • Digital Span Calibration enhances technical support and difficult installations
  • Splash proof front panel and keys (IP-65)
  • High sensitivity 0.3(µV/d for more accurate measurements
  • Automatic batching and customer programming capability
  • Bright, clear fluorescent displays
  • Hold and peak hold functions
  • User programmed timer settings and alarms
  • Improve operational safety & performance
  • Weigh-in and Loss-in-Weight batching

High-Performance Digital Filter (HPDF) for Environments with Vibration Issues

  • The High-Performance Digital Filter provides high accuracy/high speed weighing in environments with vibration problems.
  • It greatly reduces the costs and maintenance required for anti-vibration equipment since it copes with vibrations without requiring many mechanical measures.
  • What’s more, conducting weighing while applying vibrations, once an extremely difficult task, is now possible.


  • AD4401A-01 Parallel BCD output (open collector)
  • AD4401A-03 RS-422 / 485 input / output
  • AD4401A-04 RS-232C input / output
  • AD4401-06 Setpoint unit PDF
  • AD4401A-07 Analog output (4-20mA)
  • AD4401-10 Stainless steel side panel