Sartorius BSA323S-CW Precision Balance with Internal Motorized Calibration

Overview

The Sartorius BSA323S-CW is a high-performance precision balance engineered for routine laboratory weighing tasks requiring traceable accuracy, operational consistency, and regulatory compliance. Based on electromagnetic force compensation (EMFC) technology, it delivers stable, drift-resistant measurements under variable environmental conditions—critical for quality control labs, pharmaceutical formulation units, and academic research facilities where mass determination must meet ISO/IEC 17025 and USP requirements. With a maximum capacity of 320 g and readability of 1 mg, the BSA323S-CW operates within Class II precision tolerances per OIML R76 and ASTM E898–22 standards. Its internal motorized calibration system—actuated via single-key command—eliminates manual handling of external weights and ensures metrological integrity without user intervention or environmental disruption.

Key Features

• Electromagnetic force compensation sensor architecture for high long-term stability and minimal zero drift
• Motor-driven internal calibration mechanism with certified reference mass, activated at user-defined intervals or upon power-on
• Backlit high-contrast LCD display featuring 15 mm character height for optimal legibility under low-light or ambient glare conditions
• Intuitive menu-driven interface with five-language support (English, German, French, Spanish, Chinese), enabling rapid configuration without training overhead
• Tactile membrane keypad with logically grouped function keys and clearly labeled controls to reduce operator error
• RS-232C bidirectional communication port compatible with Sartorius LabX, Excel, and LIMS platforms; optional USB-to-RS232 adapter available for modern PC integration
• Robust die-cast aluminum housing with anti-static coating, designed for durability in multi-shift industrial and regulated laboratory settings

Sample Compatibility & Compliance

The BSA323S-CW accommodates a broad range of sample types—including powders, granules, liquids in tared containers, and small solid components—within its 115 mm × 120 mm stainless-steel weighing pan. Its draft shield compatibility (sold separately) enables use in semi-controlled environments without compromising repeatability. The balance meets essential regulatory prerequisites for Good Laboratory Practice (GLP) and Good Manufacturing Practice (GMP): built-in time-stamped event logging (e.g., calibration, zeroing, overload), password-protected parameter access, and configurable user roles. When paired with Sartorius LabX software, it supports 21 CFR Part 11-compliant electronic signatures, full audit trails, and automated report generation aligned with ISO 17025 clause 7.7.

Software & Data Management

Data output from the BSA323S-CW is fully structured and protocol-compliant, supporting ASCII-based transmission over RS-232C. Each weighing record includes timestamp, net/gross/tare values, stability indicator, and calibration status flag. Integration with LabX software enables real-time data capture, statistical process control (SPC) charting, automatic uncertainty calculation per EURAMET cg-18, and seamless export to CSV, PDF, or database formats. Manual data entry is minimized through auto-ID recognition of sample IDs via barcode scanners connected to the same serial port. All communications are logged with digital signatures, ensuring data integrity across the analytical workflow.

Applications

• Pharmaceutical QC: Active pharmaceutical ingredient (API) dispensing, excipient ratio verification, and tablet weight uniformity testing per USP
• Chemical R&D: Precise reagent preparation for synthesis protocols and stoichiometric calculations
• Food & Beverage: Moisture content analysis via gravimetric loss-on-drying (LOD), portion control validation, and nutritional labeling compliance
• Materials Science: Density determination of polymer pellets, metal alloys, and ceramic powders using Archimedean principles
• Environmental Testing: Filter weighing for particulate matter (PM2.5/PM10) analysis in accordance with EPA Method 201A

FAQ

What calibration standards does the internal motorized system comply with?
The BSA323S-CW’s internal calibration mass is factory-certified traceable to national metrology institutes (e.g., PTB, NIST) and conforms to ISO 9001 and ISO/IEC 17025 calibration hierarchy requirements.
Can the balance be integrated into an existing LIMS without LabX?
Yes—its RS-232C interface supports standard ASCII protocols (e.g., SICS, MTP), enabling direct integration with third-party LIMS or custom middleware using documented command syntax.
Is the 1 mg readability maintained across the full 320 g range?
Yes—linearity deviation is specified as ≤1 mg across the entire span, verified during factory calibration and confirmed by internal diagnostic routines prior to each measurement cycle.
Does the balance support dynamic weighing or animal weighing mode?
No—the BSA323S-CW is optimized for static, high-accuracy mass determination; dynamic or averaging modes are not implemented to preserve metrological rigor.
How frequently should internal calibration be performed?
Sartorius recommends calibration at startup, after significant ambient temperature shifts (>2 °C), and at defined intervals (e.g., every 2 hours in continuous operation); frequency may be adjusted based on risk assessment per ISO/IEC 17025 clause 7.6.