METTLER TOLEDO ME103 Precision Balance

Overview

The METTLER TOLEDO ME103 Precision Balance is an entry-level analytical-grade instrument engineered for routine laboratory weighing tasks requiring high reproducibility and traceable accuracy. Based on electromagnetic force compensation (EMFC) transduction, the ME103 delivers stable, drift-resistant measurements across ambient temperature fluctuations—critical for QC labs, academic teaching environments, and production line quality control stations where daily throughput and regulatory compliance are equally essential. Its 120 g maximum capacity and 1 mg readability meet the performance thresholds defined in ASTM E898–22 (Standard Guide for Selection of Weighing Equipment) and ISO 9001:2015 clause 7.1.5 for monitoring and measuring resources. The balance operates within a temperature range of 10–30 °C and relative humidity up to 80 % RH (non-condensing), with built-in environmental compensation algorithms that mitigate thermal effects on sensor output.

Key Features

• Internal automatic calibration system activated by time intervals or temperature change (≥1.5 °C), ensuring continuous metrological integrity without manual intervention
• Robust all-metal frame with reinforced chassis design, providing mechanical overload protection up to 150 % of nominal capacity (180 g)
• Ergonomic curved edges and seamless stainless-steel pan surface (Ø120 mm) minimize particle entrapment and support rapid decontamination per ISO 14644 cleanroom protocols
• GLP/ISO-compliant data handling: automatic timestamping (date + time) on every recorded result, with user ID field optional via password-protected access levels
• Intuitive single-touch interface with large backlit LCD display (128 × 64 pixels), optimized for gloved operation and low-contrast lighting conditions
• Fast stabilization time of 1.5 seconds at full load, enabling >200 weighings per hour under standard lab conditions

Sample Compatibility & Compliance

The ME103 accommodates a broad range of sample forms—including powders, granules, liquids in tared containers, and small solid components—without compromising repeatability. Its draft shield compatibility (optional accessory, part no. A010151) extends operational utility to volatile or hygroscopic materials. All firmware and hardware configurations comply with ISO/IEC 17025:2017 requirements for measurement uncertainty estimation and traceability. Internal calibration certificates are generated in accordance with EURAMET cg-18 (Guidelines on Calibration of Non-Automatic Weighing Instruments) and support audit readiness for FDA 21 CFR Part 11–aligned environments when paired with METTLER TOLEDO LabX Lite software (sold separately).

Software & Data Management

While standalone operation requires no external software, the ME103 supports RS232 and USB device-mode connectivity for direct integration into LIMS or ELN platforms. Data export formats include CSV and TXT with configurable delimiters and field sequencing. When connected to LabX Lite (a free downloadable application), users gain access to automated report generation, statistical process control (SPC) charts, and electronic signature workflows compliant with 21 CFR Part 11 Annex 11 principles. Audit trails record all critical events—including calibration logs, parameter changes, and user logins—with immutable timestamps and operator identification.

Applications

• Pharmaceutical formulation: active pharmaceutical ingredient (API) dispensing, excipient ratio verification, and tablet weight uniformity testing per USP
• Chemical synthesis: stoichiometric reagent dosing, yield calculation, and reaction mixture quantification
• Food & beverage QA: portion control validation, additive concentration checks, and moisture content pre-weighing steps
• Materials science labs: powder density determination (via sinker method), alloy composition batching, and catalyst loading precision
• Education: undergraduate physics and chemistry laboratories requiring NIST-traceable mass measurement training tools

FAQ

Does the ME103 require external weights for calibration?
No—the ME103 features an integrated motorized calibration mechanism using an internal reference mass; no external weights or technician intervention is required.
Can the ME103 be used in a fume hood?
Yes, provided ambient airflow velocity remains below 0.2 m/s at the weighing pan position and temperature gradients are stabilized; optional draft shields are recommended for consistent performance.
Is the ME103 compliant with GLP documentation standards?
Yes—automatic date/time stamping, user-accessible calibration history, and configurable print/export settings satisfy core GLP data integrity requirements outlined in OECD Principles of Good Laboratory Practice.
What is the warranty coverage for the ME103?
METTLER TOLEDO provides a standard 24-month limited warranty covering parts and labor for defects in materials and workmanship under normal use conditions.
How is measurement uncertainty estimated for the ME103?
Uncertainty budgets follow EURAMET cg-18 methodology, incorporating contributions from readability, repeatability, linearity, eccentricity, and temperature sensitivity—full calculation templates available upon request from METTLER TOLEDO Technical Support.