METTLER TOLEDO HX204 Halogen Moisture Analyzer

Overview

The METTLER TOLEDO HX204 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 thermogravimetric loss-on-drying (LOD) methodology. It operates on the principle of controlled infrared heating via a second-generation halogen lamp, followed by high-stability gravimetric measurement using a MonoBloc® weighing cell. Unlike conventional moisture analyzers where thermal convection and radiant heat compromise weighing stability, the HX204 employs a suspended weighing pan design that physically isolates the weighing unit from the heating chamber—eliminating thermal drift and ensuring metrological integrity throughout the drying cycle. This architecture enables consistent accuracy whether initiating analysis from ambient conditions or during consecutive measurements under elevated thermal load.

Key Features

• Suspended weighing pan design minimizes thermal coupling between heating source and MonoBloc® weighing cell, delivering stable 0.1 mg readability even at maximum 200 g capacity.
• Second-generation halogen heating system provides uniform radiant energy distribution, faster thermal response, and reduced thermal mass—shortening drying cycles without sacrificing reproducibility.
• FACT® (Fully Automatic Calibration Technology) ensures long-term measurement reliability through simultaneous, temperature-compensated calibration of both weighing and heating subsystems—activated automatically at user-defined intervals or ambient temperature shifts.
• Motorized lid mechanism improves operator safety and repeatability while reducing mechanical wear and contamination risk.
• Rear-mounted weighing cell and fully sealed, flat-bottomed sample chamber enable rapid decontamination (<30 s) and eliminate residue accumulation beneath the pan—a critical advantage for regulated QC environments.
• LevelControl™ integrated leveling assistance system continuously monitors instrument orientation and issues visual/audible alerts if tilt exceeds ISO 9001-compliant thresholds, supporting GLP/GMP alignment.

Sample Compatibility & Compliance

The HX204 accommodates diverse sample types—including pharmaceutical powders, foodstuffs, polymers, minerals, and agricultural products—within its 200 g maximum load capacity. Its programmable heating profiles (Standard, Gentle, Fast, Step) allow method optimization for thermally sensitive or heterogeneous matrices. The instrument supports compliance with multiple international standards, including ASTM D4442 (wood moisture), ISO 712 (cereals), USP , and pharmacopeial monographs requiring LOD-based water quantification. All calibration events, method parameters, and result metadata are time-stamped and stored with audit-trail capability, meeting FDA 21 CFR Part 11 requirements when operated within validated networked environments.

Software & Data Management

Embedded firmware provides real-time dry curve visualization, control chart generation, and pass/fail evaluation based on configurable acceptance criteria. Up to 300 user-defined methods can be stored locally, each retaining full parameter sets (temperature ramp, endpoint logic, display mode, and calibration history). Data export is supported via USB or RS232 to LIMS or ERP systems in CSV or XML format. Optional LabX® software integration enables centralized method deployment, electronic signature workflows, and automated report generation compliant with ISO/IEC 17025 documentation requirements.

Applications

The HX204 serves as a primary moisture testing platform across quality control laboratories in pharmaceutical manufacturing (raw material release, blend uniformity, tablet coating verification), food processing (shelf-life prediction, regulatory labeling compliance), chemical production (catalyst hydration state, solvent residue screening), and materials science (polymer drying validation, battery electrode moisture specification). Its ability to deliver 0.001% resolution with ≤0.01% repeatability on 10 g samples makes it suitable for applications demanding statistical process control (SPC) and multivariate trend analysis over extended operational lifetimes.

FAQ

What calibration standards are required for routine operation?
The HX204 requires certified weight standards traceable to national metrology institutes (e.g., NIST SRM 31a) for mass calibration and reference temperature sensors (e.g., PRTs calibrated per ISO/IEC 17025) for heating unit verification.
Can the HX204 be integrated into an automated lab workflow?
Yes—via optional LabX® software, PLC-compatible digital I/O, and Ethernet/IP support, enabling synchronization with robotic sample handlers, barcode scanners, and enterprise data systems.
Is the heating unit subject to periodic recalibration?
Yes—FACT® mandates two-point temperature calibration at defined setpoints (default: 100 °C and 160 °C), with traceable documentation required for ISO 17025 or GMP audits.
How does the suspended pan design improve measurement uncertainty?
By decoupling the weighing cell from conductive and convective heat transfer paths, thermal expansion-induced zero drift is reduced by >85% compared to conventional top-mounted pan architectures, directly improving Type A uncertainty components.
Does the instrument support Good Manufacturing Practice (GMP) documentation requirements?
When deployed with LabX® and configured with electronic signatures, audit trails, and role-based access control, the HX204 meets core elements of Annex 11 and ALCOA+ data integrity principles.