METTLER TOLEDO MA Series Analytical Balance

Overview

The METTLER TOLEDO MA Series Analytical Balance is an entry-level precision weighing instrument engineered for routine laboratory applications requiring high reproducibility, regulatory traceability, and operational efficiency. Based on electromagnetic force compensation (EMFC) transducer technology, the MA Series delivers stable, drift-resistant measurements across its full range—from semi-micro (0.01 mg readability) to standard analytical (0.1 mg readability) configurations. Designed in Switzerland and manufactured under strict ISO 9001-certified processes, each unit undergoes factory calibration with traceable standards and ships with full OIML R76 and NTEP Class I certification documentation. The series supports Good Laboratory Practice (GLP) and Good Manufacturing Practice (GMP) workflows through built-in audit trail capabilities, user management, and compliance-ready data export formats—making it suitable for QC labs operating under FDA 21 CFR Part 11, USP , and ISO/IEC 17025 requirements.

Key Features

• Electromagnetic force compensation (EMFC) sensor architecture ensures long-term stability, minimal thermal drift, and immunity to mechanical wear.
• Internal motorized calibration with integrated reference weights (standard configuration); optional ExCal variants omit internal weights for cost-sensitive or low-risk environments.
• Hybrid touchscreen LCD interface with intuitive icon-based navigation—designed for glove-compatible operation and rapid method recall.
• QuickLock draft shield system enables tool-free assembly/disassembly, optimized airflow management, and full accessibility during weighing of tall or irregular samples.
• Dual USB-A and RS232 interfaces support direct connection to printers, PCs, or LIMS; optional Bluetooth module enables wireless data transmission to mobile devices or networked workstations.
• Metal base and PBT polymer top housing provide structural rigidity, chemical resistance, and ease of decontamination—critical in regulated pharmaceutical and academic settings.
• Overload protection up to 500% of maximum capacity safeguards sensor integrity during accidental overloading.
• Built-in sample ID entry, tare memory, and 9 preloaded application modes—including statistics, density, percentage, and formulation—reduce manual calculation errors.

Sample Compatibility & Compliance

The MA Series accommodates a broad spectrum of sample types—from powders and granules to small metallic components and filter papers—within its standardized pan diameters (80–90 mm) and enclosed draft shield volume. All models meet OIML R76-1 (2017) and NTEP Class I accuracy requirements for legal-for-trade use in North America and globally recognized metrological frameworks. Minimum weight validation per USP is supported via automated calculation using k = 2 uncertainty expansion and user-defined tolerance thresholds (e.g., 0.10% or 1%). Each balance includes a front-mounted bubble level and adjustable feet for rapid leveling verification prior to use—a prerequisite for ISO/IEC 17025-compliant measurement uncertainty budgets. Optional ExCal models maintain identical performance specifications but exclude internal calibration weights, enabling simplified maintenance protocols where external calibration is performed at defined intervals by accredited service providers.

Software & Data Management

Data integrity and workflow integration are ensured through two complementary software platforms: MT-SICS (Standard Interface Communication Software) and EasyDirect™ Balance Software. MT-SICS provides raw ASCII data streaming to third-party systems—including LIMS, ERP, and ELN platforms—via configurable delimiters and real-time timestamping. EasyDirect™ offers a dedicated GUI for local data visualization, statistical analysis (mean, SD, CV%, min/max), PDF report generation with digital signatures, and secure user authentication (up to 10 operator profiles). Both tools support audit trail logging compliant with FDA 21 CFR Part 11 requirements, including electronic record retention, change history, and event-driven alerts for calibration due dates or out-of-tolerance conditions. Export formats include CSV, XML, and PDF/A-2b for archival compliance.

Applications

The MA Series serves as a foundational weighing platform across multiple disciplines: pharmaceutical quality control (active ingredient assay, excipient blending, tablet weight variation), academic research (gravimetric titration, catalyst loading, nanoparticle synthesis), food safety testing (moisture content, ash determination), and environmental analysis (filter weighing for particulate matter). Its fast stabilization time (2–4 s), low minimum weight thresholds (as low as 30 mg at 0.10% USP tolerance), and robust repeatability make it especially suited for high-throughput batch release testing where throughput and measurement confidence must coexist. In teaching laboratories, the intuitive interface and built-in educational applications reduce training overhead while maintaining metrological rigor.

FAQ

What calibration options are available for the MA Series?
All standard MA models feature internal motorized calibration with built-in weights; ExCal variants are offered without internal weights for labs performing periodic external calibration using certified mass standards.
Is the MA Series compliant with FDA 21 CFR Part 11?
Yes—when used with EasyDirect™ software and configured with user authentication, electronic signatures, and audit trail logging enabled, the system meets core Part 11 requirements for electronic records and signatures.
Can the MA Series be connected to a laboratory network?
Via optional Bluetooth or wired USB/RS232 interfaces, the balance integrates with local networks and enterprise systems using MT-SICS or EasyDirect™ for centralized data aggregation and remote monitoring.
What is the recommended recalibration frequency?
Per ISO/IEC 17025 and USP , recalibration interval should be risk-based—typically daily verification with check weights, plus full calibration after relocation, major environmental shifts, or at manufacturer-recommended intervals (e.g., every 6–12 months).
Does the MA Series support GLP-compliant reporting?
Yes—EasyDirect™ generates PDF reports containing balance ID, operator ID, timestamp, environmental conditions (if connected to optional sensors), raw data, statistics, and digital signature fields—all traceable via embedded audit trail.