METTLER TOLEDO ME203E Precision Balance

Overview

The METTLER TOLEDO ME203E is a high-performance entry-level precision balance engineered for consistent, traceable mass measurement in routine laboratory environments. Based on METTLER TOLEDO’s proven electromagnetic force compensation (EMFC) weighing principle, the ME203E delivers stable and reproducible results across daily operational cycles — critical for quality control, formulation, sample preparation, and educational applications. With a maximum capacity of 220 g and readability of 1 mg (0.001 g), it meets the performance requirements defined by USP for analytical and semi-micro applications where uncertainty budgets must remain within ±0.1% tolerance. Its robust mechanical architecture — including a die-cast aluminum base, stainless-steel weighing pan, and integrated overload protection — ensures long-term stability under repeated use, while the low-profile design minimizes vibration sensitivity and improves ergonomic access.

Key Features

• Electromagnetic force compensation (EMFC) sensor technology for high linearity and temperature stability
• Backlit LCD display with intuitive icon-driven interface for rapid navigation through settings and applications
• External calibration capability using certified weights, supporting periodic verification per ISO/IEC 17025 and GLP requirements
• RS232 serial interface as standard; Bluetooth connectivity available as optional upgrade for wireless data transfer
• Integrated leveling feet with bubble level indicator for quick and reliable setup on non-ideal surfaces
• Stainless-steel weighing pan (Ø120 mm) resistant to corrosion and chemical exposure
• Auto-stabilization algorithm achieving 1.5 s settling time — optimized for throughput without compromising accuracy
• Dual-material housing (die-cast aluminum + ABS) providing mechanical rigidity and ESD-safe operation

Sample Compatibility & Compliance

The ME203E accommodates a broad range of sample types — from powders and granules to small solid components and liquid containers — thanks to its open pan geometry and low center of gravity. It complies with international regulatory expectations for routine weighing tasks: minimum weight validation aligns with USP guidelines (1.4 g at 0.1% tolerance); repeatability (0.7 mg typical) supports GMP-relevant process consistency; and external calibration traceability enables audit readiness under FDA 21 CFR Part 11 when paired with compliant software. While the instrument itself does not carry CE marking for medical device use or intrinsic safety certification, it fulfills essential metrological criteria outlined in OIML R76 and EN 45501 for Class II non-automatic weighing instruments.

Software & Data Management

Data output via RS232 supports seamless integration with LIMS, ELN, or custom QA/QC databases using standard ASCII protocols. Optional Bluetooth module enables direct transmission to tablets or PCs running METTLER TOLEDO’s LabX Lite software — facilitating basic audit trail generation, user-defined report templates, and electronic signature support. All weight values are timestamped and include metadata such as unit, stability status, and calibration date. The balance stores no internal history; instead, real-time streaming ensures full data integrity and eliminates post-acquisition manipulation risk — a key consideration for laboratories operating under ISO 17025 or pharmaceutical GLP frameworks.

Applications

• Raw material verification and batch release testing in pharmaceutical and chemical manufacturing
• Weighing standards and reference materials for calibration labs performing secondary standardization
• Preparation of standard solutions and titrant stock dilutions in analytical chemistry workflows
• Quality assurance checks in food and beverage production (e.g., net content verification)
• Student experiments and teaching labs requiring reliable, low-maintenance instrumentation
• Inventory management and component counting in electronics and precision machining facilities

FAQ

What is the minimum weight that can be reliably measured on the ME203E?
The minimum weight is 1.4 g when applying USP criteria (0.1% tolerance, k=2). For general-purpose use with 1% uncertainty, the minimum is 140 mg.
Does the ME203E support internal calibration?
No — it requires external calibration using traceable weights. Internal calibration is not available in the ME-E series.
Is the balance compatible with FDA 21 CFR Part 11 compliance?
The hardware supports Part 11 readiness when used with validated software (e.g., LabX) enabling electronic signatures, audit trails, and role-based access control.
Can the ME203E operate on battery power?
No — it is AC-powered only and does not include battery backup or portable operation capability.
What environmental conditions are recommended for optimal performance?
Operate within 10–30 °C ambient temperature, ≤80% RH (non-condensing), and away from drafts, vibrations, or electromagnetic interference sources.