METTLER TOLEDO XPR Precision Balance
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | XPR Precision Balance |
| Instrument Type | Precision Balance |
| Maximum Capacity | 64.1 kg |
| Readability | 0.01 g (down to 0.1 mg in micro-precision variants) |
| Repeatability | 10 mg (up to 400 mg depending on model) |
| Stabilization Time | as fast as 0.8 s |
| Minimum Weight (USP <41>) | 82 mg – 820 g (model-dependent) |
| Compliance | USP <41>, ISO/IEC 17025, GLP/GMP-ready |
| Calibration | proFACT automatic time- and temperature-triggered internal calibration |
| Pan Technology | SmartPan™ Pro draft-free weighing pan (standard on most models) |
| Connectivity | 4 × USB-A, 1 × Ethernet (LAN), optional RS232 |
| Software Integration | LabX-compatible, FDA 21 CFR Part 11 compliant audit trail support via LabX |
| User Management | Multi-level role-based access control with customizable permissions |
Overview
The METTLER TOLEDO XPR Precision Balance is an engineered platform for high-integrity mass measurement across regulated laboratory, quality control, and industrial R&D environments. Built upon METTLER TOLEDO’s monolithic weighing cell architecture and advanced electromagnetic force compensation (EMFC) technology, the XPR series delivers exceptional stability, repeatability, and long-term drift resistance — critical for applications governed by pharmacopeial standards such as USP , EP 2.1.3, and JP 2.03. Unlike conventional strain-gauge balances, EMFC transduction eliminates mechanical hysteresis and enables true linearity across the full range. The XPR family spans capacities from 210 g to 64.1 kg, with readability options ranging from 0.1 mg to 1 g, allowing selection of the optimal balance for specific uncertainty requirements defined by minimum weight calculations per USP.
Key Features
- SmartPan™ Pro Draft-Free Weighing Pan: Patented asymmetric pan geometry and integrated air-damping design reduce aerodynamic interference by up to 80% compared to conventional pans — enabling stable 1 mg measurements without a draft shield under standard ISO 17025 environmental conditions (23 °C ±2 °C, <50% RH, no direct airflow).
- proFACT Automatic Calibration: Fully internal, dual-mode calibration system triggered either by elapsed time or temperature deviation (>1.5 °C from last calibration). Includes simultaneous internal linearization and sensitivity adjustment using factory-traceable reference masses, ensuring metrological continuity between external calibrations.
- ErgoStand-Integrated Touch Interface: Full-color 5.7″ capacitive touchscreen with adjustable tilt angle (0–30°) mounted on an articulating ErgoStand column. Reduces operator musculoskeletal strain during prolonged use and supports glove-compatible operation.
- LevelControl Visual Guidance System: Real-time graphical level indicator embedded in the display interface provides immediate visual feedback during leveling — eliminating reliance on external bubble vials and reducing setup error risk.
- Method-Based Workflow Architecture: Up to 99 user-defined weighing methods (e.g., differential weighing, formulation, density, pipette verification) can be stored directly on the balance. Each method encapsulates unit settings, tare logic, tolerance limits, data formatting, and export rules — ensuring procedural consistency across shifts and operators.
- Built-in Data Integrity Tools: Automatic timestamped result logging with metadata (operator ID, method name, ambient T/RH if connected to environmental sensor, calibration status). Supports direct export to USB storage or networked PC via configurable CSV/XML templates — no proprietary software required for basic data retrieval.
Sample Compatibility & Compliance
The XPR Precision Balance accommodates diverse sample forms — powders, granules, liquids in containers, metal parts, pharmaceutical tablets, and reference standards — via interchangeable pan configurations (SmartPan™ Pro, standard stainless steel, ceramic, or custom fixtures). All models comply with ISO/IEC 17025:2017 clause 6.4 (equipment suitability) and are designed to meet GLP and GMP documentation requirements. When paired with METTLER TOLEDO LabX software, the system satisfies FDA 21 CFR Part 11 requirements for electronic records and signatures, including audit trail generation, user authentication, and change control. USP minimum weight validation is supported through built-in calculation tools and traceable repeatability testing protocols.
Software & Data Management
While fully functional as a standalone instrument, the XPR integrates natively with METTLER TOLEDO LabX laboratory software for centralized method deployment, instrument monitoring, and regulatory reporting. LabX enables remote configuration, real-time data streaming, statistical process control (SPC) charting, and automated certificate generation (e.g., calibration reports per ISO/IEC 17025). Local data handling includes password-protected user accounts with hierarchical permission sets (administrator, supervisor, analyst), configurable login timeouts, and mandatory electronic signatures for critical actions. Data exports support comma-separated values (CSV), XML, and PDF formats — compatible with LIMS, ERP, and ELN systems.
Applications
- Pharmaceutical QC: Active pharmaceutical ingredient (API) assay, blend uniformity testing, tablet weight variation per USP , and reference standard preparation.
- Chemical & Materials R&D: Catalyst loading, polymer formulation, gravimetric moisture analysis, and density determination of solids and liquids.
- Food & Beverage Testing: Nutrient labeling compliance, ingredient proportioning, and net content verification per EU Regulation (EU) No 1169/2011.
- Academic & Metrology Labs: Teaching fundamental metrology principles, uncertainty budgeting exercises, and inter-laboratory comparison studies.
- Industrial Manufacturing: In-process checkweighing, raw material receipt inspection, and final packaging verification.
FAQ
Does the XPR Precision Balance require external calibration weights?
No — all XPR models feature internal motorized calibration masses and proFACT technology, enabling fully automated, traceable calibration without manual weight handling.
Can the balance be validated for GxP environments?
Yes — when used with documented procedures and LabX software, the XPR meets ALCOA+ data integrity principles and supports IQ/OQ/PQ execution per ASTM E2500 and Annex 11.
What is the difference between SmartPan™ Pro and standard pans?
SmartPan™ Pro uses computational fluid dynamics-optimized geometry and integrated damping channels to suppress convective air currents; standard pans lack this active airflow mitigation and typically require draft shields for sub-10 mg readability.
Is the touchscreen operable with laboratory gloves?
Yes — the capacitive display supports gloved-finger operation (tested with nitrile, latex, and cotton gloves) and includes adjustable touch sensitivity settings.
How is overload protection implemented?
Mechanical stop mechanisms engage at 150% of maximum capacity, while firmware enforces soft-limit alerts at 110%, preventing sensor saturation and preserving long-term linearity.
