METTLER TOLEDO MX105DU/A Advanced Analytical Balance

Overview

The METTLER TOLEDO MX105DU/A is a high-performance analytical balance engineered for precision mass measurement in regulated laboratory environments. Operating on electromagnetic force compensation (EMFC) principle, it delivers traceable, thermally stable weighing results with exceptional reproducibility. Its dual-range architecture—42 g at 0.01 mg readability and 120 g at 0.1 mg readability—enables flexible use across routine analytical workflows and method development requiring both ultra-fine resolution and extended capacity. The balance integrates SmartPan™ technology: a patented draft shield design with optimized airflow dynamics that suppresses convective disturbances, reducing stabilization time to just 2 seconds even under non-ideal ambient conditions. This mechanical and aerodynamic refinement directly enhances throughput without compromising metrological integrity.

Key Features

• SmartPan™ draft shield system for rapid stabilization and improved robustness against air currents
• Internal calibration with fully automatic FACT (Fully Automatic Calibration Technology), compensating for temperature fluctuations in real time
• 7-inch full-color TFT capacitive touchscreen with intuitive icon-driven interface and multi-user gesture navigation
• GxP-compliant user management with role-based access control (administrator, operator, reviewer)
• Integrated audit trail supporting FDA 21 CFR Part 11 requirements, including electronic signatures, timestamped event logging, and immutable data records
• Energy-saving mode compliant with ISO 5725-2:2019 recommendations for long-term stability during idle periods
• Modular connectivity: native USB-A and USB-C ports for peripheral integration; Gigabit Ethernet for networked lab infrastructure; optional Bluetooth for wireless mobile device pairing

Sample Compatibility & Compliance

The MX105DU/A accommodates samples up to 80 mm in diameter on its stainless-steel weighing pan, supporting standard crucibles, vials, filtration assemblies, and small-volume containers used in pharmaceutical assay, reference standard preparation, and catalyst dosing. Its metrological performance meets the minimum weight criteria defined in USP General Chapter (0.1% tolerance, typical minimum weight = 25 mg) and supports uncertainty-based minimum weight determination per ISO/IEC 17025:2017 (U = 1%, k = 2, typical minimum weight = 2.5 mg). The balance is supplied with factory calibration certificates traceable to national standards (e.g., PTB, NIST), and its firmware architecture enables compliance with EU Annex 11, ICH Q7, and GLP/GMP documentation requirements through configurable report templates and secure data export protocols.

Software & Data Management

Embedded LabX® Lite software provides seamless data handling without external PC dependency: automated report generation (PDF/CSV), customizable print layouts for thermal or network printers, and direct export to LIMS or ELN systems via Ethernet. All weighing events—including tare, net weight, statistics, and calibration logs—are timestamped, digitally signed, and stored locally with encryption. Audit trail entries capture operator ID, action type, parameter changes, and contextual metadata, fulfilling ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Data integrity is further reinforced by write-protected internal memory and optional cloud synchronization with TLS 1.2 encrypted transmission.

Applications

This balance serves critical roles in quality control laboratories performing active pharmaceutical ingredient (API) potency assays, dissolution testing sample preparation, and residual solvent quantification. It is routinely deployed in academic research for nanomaterial mass dosing, gravimetric sorption analysis, and micro-scale reaction stoichiometry validation. Regulatory submission workflows benefit from its built-in compliance features—particularly in method validation studies where repeatability (0.0125 mg typ.) and linearity across the 42 g range must be rigorously demonstrated per ICH Q2(R2). Its dual-readability configuration also supports transition between high-resolution analytical tasks and broader-range formulation checks within a single instrument footprint.

FAQ

What does “FACT” calibration mean, and how frequently is it triggered?
FACT (Fully Automatic Calibration Technology) performs temperature-triggered internal recalibration using built-in reference masses. It activates automatically when a 1.5 °C deviation from the last calibration temperature is detected—or manually on demand—ensuring continuous traceability without user intervention.
Is the MX105DU/A suitable for ISO/IEC 17025-accredited testing laboratories?
Yes. Its documented uncertainty budget, factory calibration certificate, audit trail functionality, and support for uncertainty-based minimum weight calculation align with ISO/IEC 17025:2017 clause 7.6.3 on measurement traceability and clause 7.7 on result reporting.
Can the balance interface directly with enterprise LIMS or ERP systems?
Yes. Via Ethernet, it supports standardized communication protocols including TCP/IP, Modbus TCP, and METTLER TOLEDO’s proprietary EasyDirect™ protocol, enabling bi-directional data exchange with validated middleware or custom API integrations.
Does the touchscreen support glove operation and cleaning validation?
The chemically strengthened glass display is rated IP54 for dust and splash resistance and compatible with common lab disinfectants (e.g., 70% ethanol, isopropanol); touch sensitivity remains functional with nitrile or latex gloves.
How is data security maintained during network transmission?
All Ethernet communications employ TLS 1.2 encryption; local storage uses AES-256 encryption; and user authentication follows PBKDF2-HMAC-SHA256 key derivation with salting to prevent credential compromise.