A&D AD-4212C-301 Precision Weighing Module for Dispensing Systems

Overview

The A&D AD-4212C-301 is a high-performance, OEM-integrated weighing module engineered specifically for real-time mass monitoring in automated dispensing and fluid-dosing applications. Unlike general-purpose laboratory balances, this module operates on electromagnetic force compensation (EMFC) principle—ensuring stable, drift-free measurements under dynamic industrial conditions. Its dual-range capability (51 g / 320 g) with selectable readability (0.1 mg or 1 mg) enables precise quantification of micro-dosed materials such as electrolytes, UV-curable resins, conductive pastes, solder fluxes, lubricating oils, and functional coatings. Designed for embedded integration into production machinery—including syringe-based dispensers, jet-valve systems, and gravimetric filling stations—the AD-4212C-301 delivers metrological integrity without compromising mechanical footprint or system responsiveness.

Key Features

• Ultra-fast stabilization: Achieves measurement stability in ≤ 0.5 seconds, supporting cycle times compatible with high-throughput manufacturing lines.
• High-speed data acquisition: Outputs weight values at up to 50 readings per second via RS-232 or optional analog/BCD interfaces—enabling closed-loop feedback control for dose correction.
• Robust industrial construction: Sealed stainless-steel housing rated IP65 for resistance against dust ingress and incidental liquid splashes—suitable for cleanroom Class 10,000 (ISO 7) and controlled manufacturing environments.
• Compact form factor: Only 59 mm wide with a 50 mm × 50 mm weighing pan—optimized for space-constrained integration into robotic dispensing cells, inline coating modules, and modular assembly platforms.
• Internal calibration: Built-in motorized calibration mechanism ensures traceable accuracy without manual weights; supports scheduled auto-calibration triggered by time, temperature drift, or operator command.
• OEM-ready interface suite: Standard RS-232 serial communication with ASCII protocol; optional analog (0–5 V / 0–10 V / 4–20 mA), comparator (NPN/PNP), and parallel BCD outputs for PLC synchronization and pass/fail logic control.

Sample Compatibility & Compliance

The AD-4212C-301 is validated for use with non-corrosive, low-viscosity liquids and fine particulates commonly handled in electronics, battery, and medical device manufacturing—e.g., lithium-ion electrolyte solutions, silicone encapsulants, photoresist inks, thermal interface materials, and sterile ointment bases. It complies with international metrological standards including OIML R76-1 (2021) for non-automatic weighing instruments and meets the mechanical and environmental requirements of IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emission). For regulated industries, its deterministic output behavior, audit-trail-capable firmware (when paired with compliant host software), and internal calibration traceability support alignment with FDA 21 CFR Part 11 electronic record requirements when deployed within validated manufacturing execution systems (MES).

Software & Data Management

While the AD-4212C-301 operates as a standalone hardware module, it is fully compatible with A&D’s WinCT-Mass software for configuration, diagnostics, and data logging—supporting CSV export, statistical process control (SPC) charting, and batch-level reporting. When integrated into factory automation architectures, its deterministic serial protocol allows seamless ingestion into SCADA, MES, or custom HMI platforms using standard Modbus RTU mapping (via RS-485 converter) or OPC UA gateways. All weight data streams include timestamped metadata (UTC sync supported), enabling correlation with machine motion sequences, valve actuation events, and environmental sensor inputs for root-cause analysis of dosing variance.

Applications

• Battery manufacturing: Real-time gravimetric verification of electrolyte fill volume per cell (±0.1 mg resolution critical for SEI layer consistency).
• LED and FPD assembly: Precise dispensing control of underfill epoxies, dam-and-fill adhesives, and phosphor slurries—minimizing voids and improving thermal reliability.
• Medical device production: Quantitative delivery of biocompatible hydrogels, drug-loaded suspensions, and sterilant formulations under ISO 13485-controlled processes.
• Micro-motor and bearing assembly: Controlled application of precision lubricants and anti-corrosion coatings—ensuring consistent film thickness and torque performance.
• Advanced packaging: Gravimetric validation of conformal coating thickness on PCBAs and MEMS components prior to curing.

FAQ

Is the AD-4212C-301 suitable for use in explosive atmospheres?

No—this module lacks ATEX or IECEx certification and is not rated for hazardous locations.
Can the module be calibrated externally using standard weights?

It supports only internal motorized calibration; external calibration is not user-accessible per design specification.
What is the maximum cable length supported for RS-232 communication?

Up to 15 meters without signal degradation; longer runs require RS-485 conversion with appropriate termination.
Does the unit provide temperature compensation during operation?

Yes—integrated temperature sensors feed real-time thermal drift correction into the EMFC control loop, maintaining repeatability across ambient ranges of 10–40 °C.
Is firmware upgrade capability available?

Firmware updates are performed via RS-232 using A&D’s proprietary utility; version history and release notes are documented in the OEM Integration Manual (IM-AD4212C-EN).