METTLER TOLEDO MR204/A Analytical Balance

Overview

The METTLER TOLEDO MR204/A Analytical Balance is an ISO/IEC 17025–compliant high-precision weighing instrument engineered for trace-level mass determination in regulated and non-regulated laboratory environments. Operating on electromagnetic force compensation (EMFC) principle, the MR204/A delivers stable, drift-compensated measurements with a certified readability of 1 mg and high-resolution mode readability of 0.1 mg—enabling accurate quantification of small sample masses critical in pharmaceutical formulation, reference standard preparation, and quality control testing. Its robust monolithic sensor architecture, combined with temperature-controlled internal calibration (FACT — Fully Automatic Calibration Technology), ensures long-term stability and minimizes thermal drift across ambient fluctuations. Designed for deployment in dynamic operational settings—including QC labs, production floors, and R&D facilities—the balance meets IP43 ingress protection standards and features a chemically resistant, seamless stainless-steel pan and smooth, rounded housing for rapid decontamination and compliance with hygiene-critical workflows.

Key Features

• Internal FACT calibration system with automatic temperature-triggered recalibration—no manual intervention required to maintain metrological integrity.
• 4.5-inch full-color TFT capacitive touchscreen with intuitive icon-based navigation and multi-language support (English, German, French, Spanish, Chinese, Japanese, etc.).
• Integrated levelControl™ guidance system: real-time visual feedback via on-screen bubble indicator and audible prompts ensure optimal horizontal alignment prior to measurement.
• Multi-interface connectivity: native support for RS232, USB-A, USB-C, and Ethernet (TCP/IP), enabling seamless integration into LIMS, MES, and PLC systems using standardized MT-SICS (METTLER TOLEDO Standard Interface Command Set) protocol.
• User management with role-based access control (up to 10 user profiles), password protection, and audit trail logging for GLP/GMP compliance.
• Energy-saving mode automatically reduces power consumption during idle periods without compromising readiness or calibration status.
• Compact footprint (209 mm wide) and low-profile design facilitate installation in fume hoods, glove boxes, and confined analytical workstations.

Sample Compatibility & Compliance

The MR204/A accommodates a broad range of sample types—from powders and granules to viscous liquids and coated tablets—within its 90 mm diameter stainless-steel pan. Its minimum weight performance (160 mg per USP at 0.1% tolerance, k=2) validates suitability for pharmacopeial applications including assay, dissolution testing, and content uniformity analysis. The balance conforms to international regulatory frameworks: it supports 21 CFR Part 11 compliance when paired with METTLER TOLEDO LabX® software (audit trail, electronic signatures, data integrity controls); meets ISO 9001 and ISO/IEC 17025 requirements for measurement uncertainty reporting; and satisfies EU Directive 2014/31/EU for non-automatic weighing instruments used in legal metrology (trade settlement). All factory calibrations are traceable to national standards (e.g., PTB, NIST) via DAkkS-accredited calibration certificates.

Software & Data Management

Data integrity is ensured through native compatibility with METTLER TOLEDO’s LabX® standalone software and direct integration into enterprise systems via MT-SICS. LabX provides full electronic recordkeeping—including timestamped raw data, metadata (operator ID, location, environmental conditions), and automated report generation compliant with ALCOA+ principles. The balance stores up to 1,000 measurement records internally with time/date stamping, and exports data in CSV, XML, or PDF formats. Ethernet connectivity enables remote monitoring, firmware updates over LAN, and centralized device management across multi-site deployments. Optional Bluetooth module supports wireless pairing with mobile devices for ad-hoc data capture in field applications.

Applications

• Pharmaceutical: Active pharmaceutical ingredient (API) dispensing, reference standard weighing, excipient ratio verification, and stability study sample preparation.
• Chemical & Materials Science: Catalyst loading, polymer additive dosing, nanomaterial dispersion quantification, and stoichiometric reagent weighing.
• Food & Beverage: Nutrient fortification validation, allergen threshold testing, and sensory panel sample preparation requiring sub-milligram consistency.
• Academic Research: Gravimetric titration, crystallization kinetics, and micro-reaction stoichiometry where measurement reproducibility ≤ 0.08 mg is essential.
• Industrial QA/QC: Incoming raw material inspection, batch release testing, and packaging net content verification under OIML R76 or NIST Handbook 44 guidelines.

FAQ

What is the difference between certified readability (1 mg) and high-resolution mode (0.1 mg)?
Certified readability reflects the smallest increment legally validated for trade or regulatory use per OIML R76; high-resolution mode is intended for internal process optimization and method development—not for certified documentation.
Does the MR204/A support GMP-compliant electronic signatures?
Yes—when operated with LabX software and configured with user authentication, digital signature workflows, and immutable audit trails, it fulfills FDA 21 CFR Part 11 requirements.
Can the balance be integrated into a Siemens PLC environment?
Yes—via RS232 or Ethernet using MT-SICS ASCII commands; preconfigured function blocks are available for SIMATIC S7 platforms.
Is FACT calibration sufficient for daily verification in a GLP lab?
FACT maintains calibration stability, but GLP mandates documented daily performance checks using traceable test weights; the MR204/A supports automated checkweighing routines with pass/fail thresholds.
What environmental conditions affect repeatability?
Air currents, electrostatic charge, vibration, and thermal gradients >0.5 °C/hour degrade repeatability; the MR204/A includes draft shield compatibility and anti-static ionizer options to mitigate these factors.