A&D Weighing AD-4406A Indicator

The AD-4406A can connect to up to four 350-ohm load cells, making it suitable for many platform, floor, hopper, tank, and custom weighing systems. It supplies 5 V DC load-cell excitation at up to 60 mA and uses remote sensing to support stable signal measurement. The exact load-cell configuration should always be matched to the electrical and mechanical requirements of the complete scale system.

Yes. One of the AD-4406A's practical advantages is its ability to operate from six C-size alkaline batteries, in addition to compatible external power. A&D specifies approximately 180 hours of battery operation with one 350 Ω load cell and about 70 hours when driving four 350 Ω load cells, depending on operating conditions. This makes the indicator useful for mobile scales and installations where continuous access to AC power may not be convenient.

Yes. The AD-4406A supports simple batch weighing and comparator functions, allowing weight values to be evaluated against programmed limits or setpoints. Its comparator can provide HiHi, Hi, OK, Lo, and LoLo judgments, while optional relay interfaces can communicate those results to compatible external equipment. These capabilities make the indicator useful for filling, batching, checkweighing, sorting, and basic process-control applications.

The AD-4406A offers several optional interfaces for integrating the indicator into a larger weighing or control system. Available configurations include RS-232C, RS-422/485, relay outputs, external control inputs, current-loop output, and 4–20 mA analog output. A&D's Universal Flexi Coms (UFC) functionality also allows users to customize serial output and printing formats for compatible systems.

Yes. The AD-4406A supports multi-interval operation with two selectable weighing ranges. This allows a properly configured scale system to use finer divisions at lower loads while providing a larger overall weighing range when needed. The indicator also supports accumulation, code memory, comparator functions, and selectable function keys, giving system designers flexibility for different industrial weighing workflows.