METTLER TOLEDO XS4001S Precision Balance

Overview

The METTLER TOLEDO XS4001S Precision Balance is an engineered solution for laboratories requiring consistent, high-throughput mass measurement in routine quality control, formulation, and production support applications. Operating on electromagnetic force compensation (EMFC) technology, the XS4001S delivers stable, drift-resistant readings under variable environmental conditions—including draft-prone environments, temperature fluctuations, and vibration sources common in industrial labs or shared analytical spaces. With a maximum capacity of 4.1 kg and readability of 0.1 g, it bridges the performance gap between analytical and top-loading balances, offering precision where higher resolution is unnecessary but repeatability and operational robustness are critical. Its compact footprint (96 mm H × 195 mm W × 257 mm D), low-profile housing, and integrated ergonomic design reflect METTLER TOLEDO’s commitment to human-centered instrumentation—reducing operator fatigue during extended use while maintaining metrological integrity per ISO/IEC 17025 and GxP-aligned workflows.

Key Features

• SmartPan™ weighing pan: Standard on all XS series models, this patented pan design minimizes air current interference by optimizing airflow dynamics—enabling stable 0.1 g measurements even without draft shields in fume hoods or laminar flow cabinets.
• ErgoStand™ adjustable base: A height- and angle-adjustable platform that supports neutral wrist and forearm positioning, reducing musculoskeletal strain during repetitive weighing tasks—validated through occupational ergonomics studies with laboratory personnel.
• FACT (Fully Automatic Calibration Technology): Built-in motorized internal calibration ensures traceable accuracy across temperature gradients; automatic recalibration triggers at user-defined intervals or upon detection of ambient temperature shifts ≥1.5 °C.
• TestManager™ embedded diagnostics: Runs automated daily verification routines—including zero stability, linearity check, and repeatability assessment—generating timestamped logs compliant with ISO 9001 and FDA 21 CFR Part 11 audit trail requirements.
• High-contrast 16-mm LED display: Optimized for visual acuity at standard working distances; supports multi-language UI and intuitive QWERTY keyboard input for sample IDs, batch numbers, and operator codes.
• Modular cleanability: SmartPan™ detaches in seconds; spill containment tray beneath the pan captures liquids and particulates, protecting the load cell assembly; all external surfaces feature seamless, non-porous polymer finishes resistant to common solvents and disinfectants.

Sample Compatibility & Compliance

The XS4001S accommodates heterogeneous sample forms—from bulk powders and granules to packaged intermediates and pre-weighed vials—without compromising measurement fidelity. Its 190 mm × 223 mm pan area supports standard 100 mm and 120 mm containers, while the 4.1 kg capacity enables direct weighing of larger vessels used in pharmaceutical blending, food ingredient batching, or chemical synthesis prep. The balance meets international metrological standards including OIML R76 (Class II), EN 45501, and ISO 17025 clause 6.5.2 for equipment suitability. Though not certified for legal-for-trade applications, its documented uncertainty budget (±60 mg linearity, ±40 mg repeatability) satisfies USP , EP 2.1.3, and JP 2.02 criteria for non-regulated quantitative procedures. All firmware and calibration records adhere to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) when interfaced with LabX software.

Software & Data Management

The XS4001S integrates natively with METTLER TOLEDO’s LabX® laboratory software via Ethernet or USB connection. LabX enables full SOP-driven operation: users execute preconfigured workflows directly from the balance touchscreen—including tare sequences, statistical averaging, pass/fail logic based on tolerance limits, and real-time calculation of yield, concentration, or % recovery. All raw data, metadata (operator ID, timestamp, environment log), and audit trails are stored centrally and encrypted per NIST SP 800-53 controls. Electronic signatures, role-based access, and 21 CFR Part 11-compliant electronic records ensure compliance in regulated environments. Optional connectivity to LIMS or MES systems via OPC UA or RESTful API supports end-to-end digital batch records.

Applications

• Pharmaceutical QC labs: Weighing excipients and APIs prior to tablet compression or capsule filling; performing content uniformity checks per USP .
• Food & beverage R&D: Accurate batching of flavorings, preservatives, and nutritional fortificants in pilot-scale formulations.
• Chemical manufacturing: Dispensing catalysts, reagents, and reaction intermediates where ±0.1 g tolerance is sufficient for process consistency.
• Academic teaching labs: Robust platform for stoichiometry experiments, gravimetric analysis, and method validation exercises under variable student usage patterns.
• Environmental testing facilities: Preparing soil/sediment composites and filter media for extraction protocols requiring reliable sub-gram mass determination.

FAQ

What is the minimum weight requirement for USP compliance on the XS4001S?
The typical minimum weight is 82 g, calculated per USP using a repeatability criterion of 0.10% and a standard deviation of 40 mg.
Does the XS4001S support external calibration with traceable weights?
Yes—it accepts external calibration via user-provided Class M2 or better weights; however, FACT internal calibration is recommended for routine use to maintain thermal stability and reduce manual intervention.
Can the balance be cleaned with 70% ethanol or isopropyl alcohol?
All external surfaces—including the SmartPan™ and ErgoStand™—are compatible with 70% ethanol, 70% IPA, and quaternary ammonium disinfectants; avoid abrasive cleaners or prolonged solvent immersion.
Is LabX software included with the XS4001S purchase?
LabX Basic is provided free of charge; LabX Professional (with advanced reporting, electronic signatures, and LIMS integration) requires a separate license subscription.
How does the stabilization time of 0.8 s impact throughput in high-volume weighing environments?
This rapid settling time—achieved via adaptive filtering algorithms—reduces per-sample dwell time by up to 35% compared to legacy precision balances, significantly increasing daily sample processing capacity without sacrificing measurement confidence.