METTLER TOLEDO HG63 Halogen Moisture Analyzer

Overview

The METTLER TOLEDO HG63 Halogen Moisture Analyzer is a precision laboratory instrument engineered for rapid, reliable, and traceable determination of moisture content in solid and semi-solid samples using halogen lamp heating combined with high-resolution analytical weighing. Based on the thermogravimetric principle—where mass loss upon controlled thermal drying is quantified as moisture—the HG63 delivers consistent results across diverse matrices including pharmaceutical excipients, food powders, polymers, minerals, and agricultural products. Its robust architecture integrates a 500 W halogen heating module with precise temperature control (±1 °C), enabling reproducible drying profiles from 40 °C to 200 °C. Designed for routine QC/QA environments, the HG63 meets foundational requirements for method validation under ISO 8573-3, USP <921>, and ASTM D4457, supporting GLP-compliant documentation when paired with appropriate software and audit-trail configurations.

Key Features

• High-precision dual-sensor system: 1 mg weight readability coupled with 0.01 % moisture resolution ensures detection of minute moisture variations critical for low-moisture formulations (e.g., lyophilized APIs or anhydrous salts).
• Dual drying program selection: Standard mode optimizes accuracy for thermally sensitive materials; Rapid mode accelerates throughput without compromising repeatability—validated at ±0.01 % RSD for 10 g samples.
• Intuitive method management: Store and recall up to 10 user-defined methods directly on-device, each configurable with target temperature, shut-off logic (5-step auto-termination or time-based), and custom calculation factors.
• Integrated graphical weighing assistant: Real-time mass vs. time curve visualization on the backlit LCD display aids in method development and anomaly detection during drying.
• Comprehensive data integrity tools: Built-in statistical functions (mean, SD, CV%), logging of all measurement events (including balance calibration, heating tests, and method execution), and timestamped result records support 21 CFR Part 11 readiness when used with METTLER TOLEDO LabX software.
• Modular connectivity: Standard LocalCAN interface enables seamless integration into lab networks; optional RS232 supports legacy LIMS or ERP systems for automated result transfer.

Sample Compatibility & Compliance

The HG63 accommodates sample masses ranging from 0.1 g to 61 g, making it suitable for both micro-quantity assays (e.g., catalysts or reference standards) and bulk industrial samples (e.g., flour, cement, or granulated sugar). Its open-sample chamber design—equipped with an ergonomic sample pan holder and optional automation-ready accessories—facilitates rapid loading and minimizes operator-induced variability. The instrument complies with international regulatory expectations for moisture analysis instrumentation: its temperature uniformity and weight stability are verified per ISO/IEC 17025 calibration protocols; drying performance is traceable to NIST-traceable reference standards (e.g., sodium tartrate dihydrate). When deployed in GMP environments, the HG63 supports qualification activities (IQ/OQ/PQ) through documented hardware specifications, firmware version control, and configurable electronic signatures via LabX.

Software & Data Management

While the HG63 operates autonomously via its onboard interface, full data governance is achieved when connected to METTLER TOLEDO LabX™ Moisture Analysis Software. LabX provides centralized method deployment, role-based user access control, electronic signature enforcement, and complete audit trail generation—including operator ID, parameter changes, raw drying curves, and final moisture reports—in compliance with FDA 21 CFR Part 11 and EU Annex 11. All measurement logs—including balance diagnostics, heating module self-tests (at 100 °C and 160 °C), and daily verification checks—are exportable in CSV or PDF format for internal review or regulatory submission. Optional printer integration enables immediate hard-copy output of results with embedded metadata (date/time, method ID, sample ID, operator name).

Applications

• Pharmaceutical manufacturing: Moisture verification of active pharmaceutical ingredients (APIs), excipients, and finished dosage forms per USP <921> and Ph. Eur. 2.2.32.
• Food quality control: Rapid assessment of moisture in cereals, dairy powders, spices, and pet food to ensure shelf-life stability and regulatory labeling accuracy (FDA 21 CFR 101.9).
• Chemical & polymer industries: Monitoring residual solvent content in resins, catalysts, and monomers prior to polymerization or packaging.
• Materials science research: Quantifying hygroscopic uptake in battery electrode materials, MOFs, or desiccants under controlled thermal ramping.
• Academic teaching labs: Demonstrating thermogravimetric principles with real-time graphical feedback and repeatable student experiments.

FAQ

What calibration standards are recommended for routine verification?
Sodium tartrate dihydrate (15.66 % moisture) and calcium carbide (anhydrous reference) are commonly used for performance checks; METTLER TOLEDO provides certified reference materials with CoA.

Can the HG63 be qualified for GMP use?
Yes—when paired with LabX software, documented IQ/OQ protocols, and periodic preventive maintenance, the HG63 fulfills core requirements for regulated environments per WHO TRS 986 Annex 4 and EU GMP Annex 15.

Is method transfer between HG63 units supported?
Method files (.mth) exported from one HG63 can be imported directly onto another unit, ensuring consistency across multi-site QC laboratories.

How does the 5-level automatic shut-off improve accuracy?
It dynamically evaluates mass change rate over consecutive intervals, terminating drying only when mass loss falls below user-defined thresholds—reducing over-drying risks for heat-labile samples.

Does the instrument support non-standard moisture calculations (e.g., solids content or volatile matter)?
Yes—via the “free factor” function, users can define custom formulas (e.g., % solids = 100 – % moisture) and assign them to specific methods.