A&D Weighing AD-4407A Indicator

The AD-4407A is designed to convert signals from compatible strain-gauge load cells into displayed weight values. It supplies 5 V DC load-cell excitation at up to 120 mA and can drive up to eight 350-ohm load cells. This makes it suitable for building or upgrading industrial weighing systems such as platform scales, floor scales, hopper systems, tanks, and other load-cell-based applications, provided the complete system is properly engineered and calibrated.

Yes. A&D lists the AD-4407A as NTEP and Measurement Canada approved for legal-for-trade applications. This makes it a potential choice for commercial weighing systems where weight determines price or another regulated transaction. The complete scale system must still meet applicable configuration, installation, calibration, sealing, and local weights-and-measures requirements before being placed into legal-for-trade service.

Yes. The AD-4407A offers simple and automatic batching capabilities as well as comparator functions for applications that need weight-based decisions. Its comparison modes include HiHi, Hi, OK, Lo, and LoLo, while optional relay outputs can be used to communicate weighing conditions to compatible external control equipment. This makes the indicator useful for filling, batching, checkweighing, process control, and other industrial weighing applications.

The AD-4407A includes RS-232C communication as standard and supports A&D's Universal Flexi Coms (UFC), which allows users to customize serial data and printing formats. Optional interfaces expand integration possibilities with RS-422/485, relay outputs, control inputs, current-loop communication, and 4–20 mA analog output, depending on the option installed. This flexibility makes the indicator easier to integrate with compatible computers, printers, PLCs, and industrial control systems.

Yes. The AD-4407A supports a multi-interval, two-range configuration, allowing two weighing ranges and divisions to be configured within one weighing system. This can be valuable when an application needs finer resolution at lower loads while still retaining a larger overall weighing capacity. The indicator also provides counting, preset tare, accumulation, code-memory, and comparator functions for more specialized weighing workflows.