A&D GF Series Precision Top-Loading Electronic Balance

Overview

The A&D GF Series Precision Top-Loading Electronic Balance is a laboratory-grade weighing instrument engineered for accuracy, repeatability, and operational robustness in regulated and non-regulated environments. Utilizing A&D’s proprietary SHS (Super Hybrid Sensor) load cell technology, the GF Series delivers stable, drift-compensated measurements with response times under one second — a critical advantage in high-throughput QC labs, formulation workflows, and analytical sample preparation. As a top-loading design, it optimizes accessibility and workflow integration while maintaining mechanical stability through a rigid internal frame and vibration-dampening base. Manufactured in Japan to stringent quality control standards, each unit undergoes factory calibration traceable to JCSS (Japanese Calibration Service System), ensuring metrological integrity from commissioning through routine use.

Key Features

• SHS (Super Hybrid Sensor) electromagnetic force compensation system with active temperature and linearity compensation
• High-contrast fluorescent LCD display with large-digit readability (18 mm digit height) and multi-language interface support (English, Spanish, French, German, Chinese)
• IP54-rated enclosure providing protection against dust ingress and water splashes — suitable for shared lab benches and production floor environments
• Internal calibration function with optional external calibration weight support (certified Class M2 or better)
• RS-232 serial interface as standard; compatible with Windows-based LIMS, ELN, and ERP systems via ASCII protocol
• GLP/GMP-compliant data output including date/time stamp, operator ID field, balance ID, calibration status, and net/gross/tare flags
• Auto-zero tracking and auto-stabilization algorithms minimize operator-dependent variability
• Modular design enabling field-upgradable firmware and configurable application modes (e.g., parts counting, percentage weighing, density determination)

Sample Compatibility & Compliance

The GF Series accommodates a broad range of sample types — from fine powders and viscous liquids in tared containers to solid reference standards and packaged pharmaceutical intermediates. Its flat, stainless-steel weighing pan (128 × 128 mm for models up to 4100 g; 165 × 165 mm for higher-capacity variants) supports standard labware including weighing boats, crucibles, beakers, and custom fixtures. All models comply with international metrological requirements per OIML R76-1 (2021) and NIST Handbook 44. For regulated industries, the balance supports 21 CFR Part 11–compliant audit trails when paired with validated data capture software — including electronic signature capability, user access levels, and immutable record generation. Routine performance verification aligns with ASTM E898, USP , and ISO/IEC 17025 clause 6.5.2 for measurement uncertainty assessment.

Software & Data Management

Data integrity is maintained through native RS-232 ASCII output formatted for direct ingestion into laboratory informatics platforms. Each weighing event transmits a timestamped, comma-delimited string containing: balance ID, mode (net/gross/tare), value, unit (g), stability flag, and calibration alert status. Optional A&D WinCT software (v4.2+) provides real-time graphing, statistical process control (SPC) charts, batch export to CSV/XLSX, and customizable report templates compliant with GLP Annex 11 and EU GMP Annex 11. The balance stores up to 999 internal records with time/date stamps — retrievable via serial query or printed via optional thermal printer interface. Firmware updates are delivered via secure USB dongle or serial download, with version history and change logs retained in non-volatile memory.

Applications

• Pharmaceutical manufacturing: raw material receipt inspection, API dispensing, blend uniformity testing per USP
• Chemical R&D: stoichiometric reagent dosing, catalyst loading, gravimetric titration preparation
• Food & beverage QA: nutritional labeling compliance, moisture loss assays, ingredient proportioning
• Academic research: sample preparation for ICP-MS, GC-MS, and XRD analysis where sub-milligram precision is required
• Materials science: powder density characterization, additive manufacturing feedstock verification, coating thickness validation via mass-thickness correlation
• Environmental testing labs: filter weighing for PM2.5/PM10 analysis per EPA Method 201A and ISO 12103-1

FAQ

Is the GF Series compliant with 21 CFR Part 11 for electronic records?
Yes — when used with validated third-party data capture software (e.g., LabArchives, Thermo Fisher SampleManager) or A&D WinCT v4.2+, the GF Series supports audit trail generation, electronic signatures, and role-based user authentication required under 21 CFR Part 11.

What calibration standards are recommended for routine verification?
Class M2 weights certified to ISO/IEC 17025 are recommended for daily checks. Annual recalibration should be performed by an accredited metrology laboratory using JCSS-traceable standards.

Can the GF Series be integrated into a networked lab environment?
While RS-232 is standard, Ethernet or Wi-Fi connectivity is not natively supported. Integration into networked systems requires a serial-to-Ethernet converter or middleware gateway configured for Modbus RTU or ASCII pass-through.

Does the balance support dynamic weighing or motion compensation?
No — the GF Series is designed for static, stabilized weighing only. It does not include active motion compensation; users must ensure mechanical stability and minimize air currents during operation.

Are service manuals and firmware available to end users?
Service manuals are restricted to A&D-authorized service partners. Firmware updates and basic operation guides are publicly available via A&D’s global support portal with registered account access.