METTLER TOLEDO MX Series Analytical Balance

Overview

The METTLER TOLEDO MX Series Analytical Balance represents a benchmark in high-precision mass measurement for regulated and research-intensive laboratory environments. Engineered around the proprietary MonoBloc® high-resolution weighing sensor and FACT® (Fully Automatic Calibration Technology), the MX platform delivers exceptional stability, reproducibility, and long-term drift resistance—critical for applications demanding traceable, audit-ready results. Unlike conventional analytical balances relying on mechanical compensation or external calibration routines, the MX series integrates temperature-compensated internal calibration with real-time drift monitoring, enabling automatic recalibration triggered by predefined environmental thresholds or user-defined schedules. Its measurement principle adheres strictly to electromagnetic force compensation (EMFC), ensuring linearity across the full range and minimizing hysteresis effects. Designed for seamless integration into modern digital lab infrastructures, the MX balance supports both standalone operation and networked deployment under GLP, GMP, and ISO/IEC 17025 frameworks.

Key Features

• MonoBloc® Weighing Cell: Single-piece, stress-free sensor architecture eliminates micro-fracture risks and ensures consistent sensitivity across temperature gradients (±0.0005 °C stability per °C ambient change).
• FACT® Automatic Internal Calibration: Dual-weight internal calibration system performs full-range verification at user-specified intervals or upon temperature deviation >1.5 °C—no manual weights required.
• 7-inch Full-Color Touchscreen Interface: Intuitive, icon-driven UI with multi-language support; configurable home screen layouts for task-specific workflows (e.g., formulation, dispensing, differential weighing).
• Ergonomic Design Elements: Motorized draft shield with soft-close mechanism, front-accessible leveling feet, and optimized height-to-pan distance (120 mm clearance) reduce operator fatigue during prolonged use.
• Robust Mechanical Architecture: All-metal housing (stainless steel base + aluminum alloy frame), overload protection up to 5× nominal capacity, and IP54-rated dust/moisture resistance for cleanroom-compatible operation.
• Energy-Efficient Operation: Adaptive power management reduces standby consumption to <0.5 W; automatic sleep mode activates after 30 minutes of inactivity without compromising warm-up stability.

Sample Compatibility & Compliance

The MX Series accommodates diverse sample forms—including powders, crystalline solids, viscous liquids in tared vessels, and small-volume reference standards—within its standardized pan geometry (80–90 mm diameter) and 353 mm total height envelope. All models meet OIML R76-1 (Class I) and NTEP Certificate of Conformance (Class I, 0.0001 g resolution), ensuring legal-for-trade suitability where applicable. For pharmaceutical quality control, the balance satisfies USP (Balance Performance Verification) and (Weighing on an Analytical Balance) requirements, including minimum weight determination at ±0.10% tolerance (validated down to 2.5 mg for MX105/MX105DU/MX205DU and 10 mg for MX104/MX204/MX304). Built-in StatusLight™ provides immediate visual feedback on calibration status, draft shield closure, and readiness—supporting 21 CFR Part 11-compliant electronic records when paired with EasyDirect™ software.

Software & Data Management

Data integrity is enforced through dual-layer software architecture. At the instrument level, MT-SICS (METTLER TOLEDO Standard Interface Communication Software) enables direct export of raw weighing data—including timestamp, operator ID, sample ID, tare value, net weight, and environmental logs—to LIMS or ELN systems via USB-A, USB-C, or Ethernet. Optional Bluetooth 5.0 module facilitates wireless pairing with mobile devices for remote monitoring. The companion EasyDirect™ PC software provides advanced reporting capabilities: customizable templates (PDF/CSV/XLSX), statistical analysis (mean, SD, RSD, trend charts), audit trail with immutable timestamps (GLP-compliant), and role-based user access control (administrator, analyst, reviewer). All data transfers are encrypted using TLS 1.2; metadata fields support structured annotation per ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Pharmaceutical QC/QA: Active pharmaceutical ingredient (API) assay, reference standard preparation, content uniformity testing, and dissolution sample weighing per USP monographs.
• Academic & Industrial Research: Nanomaterial dosing, catalyst loading, gravimetric sorption analysis, and isotope ratio sample preparation requiring sub-10 µg repeatability.
• Chemical Manufacturing: Batch reconciliation, formulation verification, and raw material release testing under ISO 9001 and IATF 16949 protocols.
• Environmental Labs: Filter weighing for PM2.5/PM10 analysis, soil moisture content determination, and sediment residue quantification per EPA Method 1664B.
• Clinical Diagnostics: Calibration standard preparation for immunoassay reagents and trace element analysis in biological matrices (serum, urine).

FAQ

What regulatory standards does the MX Series comply with?
The MX balance is certified to OIML R76-1 (Class I), NTEP (Class I), and meets technical requirements of USP , , and ISO/IEC 17025 Annex A.5 for analytical balance qualification.

How does FACT® differ from traditional internal calibration?
FACT® employs two built-in calibration masses and real-time thermal drift modeling to trigger recalibration only when sensor performance deviates beyond statistically defined limits—reducing unnecessary cycles and extending service life.

Can the MX balance be integrated into a validated LIMS environment?
Yes—via MT-SICS or EasyDirect™, all weighing events generate digitally signed, time-stamped records with full traceability (operator, location, method, environmental conditions), supporting 21 CFR Part 11 and EU Annex 11 compliance.

What is the minimum weight validation procedure for USP ?
The MX Series calculates minimum weight automatically using the built-in “Minimum Weight Assistant,” applying k = 2 coverage factor and 0.10% tolerance per USP . Results are logged with uncertainty budget and environmental context.

Is the draft shield removable for cleaning or large-sample handling?
No—the QuickLock™ draft shield is tool-free and fully detachable; however, removal invalidates calibration until FACT®-initiated revalidation is performed.