Sartorius BSA-CW Series Fully Automatic Internal Calibration Analytical Balance

Overview

The Sartorius BSA-CW Series analytical balance is an ISO/IEC 17025-compliant precision weighing instrument engineered for laboratories requiring high reproducibility, traceable calibration, and operational robustness in routine analytical and quality control workflows. Based on electromagnetic force compensation (EMFC) transduction technology, the BSA124S-CW delivers stable, drift-compensated mass measurement across ambient temperature fluctuations (10–30 °C) and typical laboratory vibration conditions. Its 120 g maximum capacity and 0.1 mg readability meet the performance requirements of USP , ASTM E898, and ISO 9001-certified environments where measurement uncertainty must be rigorously controlled. The integrated motor-driven internal calibration system—activated via single-key operation—eliminates manual handling of external weights, reducing contamination risk and operator-induced error while ensuring compliance with GLP and GMP documentation standards.

Key Features

• Motor-driven internal calibration mechanism with automatic temperature-triggered recalibration (ATC), compliant with ISO 17025 clause 6.5.2 for calibration traceability
• High-contrast backlit LCD display featuring 15 mm character height for legibility under low-light or high-glare conditions—critical for cleanroom and multi-shift lab environments
• Tactile key interface with intuitive, five-language menu navigation (English, German, French, Spanish, Chinese), minimizing training time and reducing misconfiguration risk
• RS-232C bidirectional serial interface supporting direct data transfer to LIMS, ELN, or statistical process control (SPC) software; optional USB-to-RS232 cable available for legacy PC integration
• Robust aluminum die-cast housing with draft shield compatibility (standard 90 mm diameter pan) and anti-static coating to mitigate electrostatic interference during low-mass sample handling
• Integrated level indicator and adjustable feet ensure mechanical stability on non-ideal bench surfaces—verified per OIML R 76-1 Annex C vibration tolerance requirements

Sample Compatibility & Compliance

The BSA124S-CW accommodates a broad range of solid, granular, and powdered samples—including pharmaceutical actives, reference standards, catalysts, and micro-biological culture media—within its 90 mm stainless steel weighing pan. Its 0.1 mg repeatability (at full load, per ISO 11352:2017) and ≤ 0.2 mg linearity error support applications demanding conformity to USP method validation criteria. The balance meets CE marking requirements under the Measuring Instruments Directive (MID 2014/32/EU) and is certified to EN 14372 for laboratory use. Internal calibration traceability is maintained through Sartorius’ factory-issued calibration certificate (traceable to PTB, Germany), satisfying audit requirements for FDA 21 CFR Part 11 electronic records and Annex 11 computerized system validation.

Software & Data Management

Data output follows NIST-traceable ASCII protocol over RS-232C, enabling seamless integration with Sartorius LabX® Lite (free basic version) or third-party platforms such as Thermo Fisher SampleManager™ and LabWare LIMS. All weight events—including calibration logs, zero checks, and user-initiated tare operations—are timestamped and stored with operator ID (when connected to domain-authenticated networks). Audit trail functionality complies with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) and supports 21 CFR Part 11 electronic signature readiness when deployed with validated authentication layers.

Applications

• Quantitative preparation of standard solutions and reference material dilutions in QC labs
• Weighing of active pharmaceutical ingredients (APIs) during formulation development per ICH Q5C guidelines
• Gravimetric analysis in environmental testing (e.g., filter mass change in PM2.5 particulate monitoring)
• Calibration of pipettes and volumetric glassware using ASTM E1272 reference procedures
• Stability-indicating assays requiring repeated small-mass measurements under controlled humidity conditions

FAQ

Does the BSA124S-CW require external calibration weights?
No—the balance features a fully automated, motor-driven internal calibration system with factory-traceable reference masses. External calibration is optional only for independent verification or regulatory audit purposes.
Is the RS-232 interface compatible with modern Windows/macOS systems?
Yes—when used with a certified USB-to-RS232 adapter (e.g., FTDI-based), the interface supports real-time data streaming to Excel, Python scripts, or validated LIMS clients without proprietary drivers.
What environmental conditions affect repeatability performance?
Repeatability remains within specification (≤ 0.1 mg) when operated at 10–30 °C, < 80% RH non-condensing, and on vibration-isolated surfaces meeting ISO 5347 Class 2 criteria.
Can the balance store calibration history internally?
Yes—up to 100 calibration events (date/time stamp, operator ID if configured, deviation values) are retained in non-volatile memory and exportable via RS-232.
Is the display readable under UV sterilization lighting in biosafety cabinets?
Yes—the high-contrast monochrome LCD maintains > 12:1 contrast ratio even under 254 nm UV-C exposure, verified per IEC 61000-4-3 immunity testing.