Sartorius BSA323S Precision Balance

Overview

The Sartorius BSA323S Precision Balance is an entry-level high-reliability analytical-grade instrument engineered for routine quality control, laboratory formulation, and educational applications requiring consistent 1 mg readability. Designed with Sartorius’ proven monolithic single-lever sensor architecture and 40 MHz microprocessor control (MC1), the BSA323S delivers rapid stabilization—typically within 1 second—and maintains metrological stability across ambient temperature fluctuations through dynamic temperature compensation (DTC). Unlike basic platform scales, the BSA323S operates on electromagnetic force restoration (EMFR) principle, ensuring linearity and long-term drift resistance without mechanical wear. Its robust aluminum die-cast housing and anti-static coated glass draft shield (five-sided design) mitigate electrostatic interference and air turbulence—critical for low-mass measurements in non-controlled environments. The balance meets fundamental metrological requirements for ISO/IEC 17025-accredited laboratories when operated within specified environmental conditions (20 ±5°C, <70% RH, vibration-free surface).

Key Features

• Monolithic single-lever electromagnetic force restoration (EMFR) sensor with integrated temperature compensation
• Five-sided anti-static glass draft shield for enhanced environmental isolation and operator visibility
• Internal calibration (BSA323S-CW variant) with motorized built-in weight; external calibration option available (BSA323S)
• Front-mounted bubble level and adjustable stainless-steel feet for rapid, traceable leveling
• Dual tare keys (left/right) supporting ergonomic operation for both right- and left-handed users
• Downward hook assembly for below-balance density determination and large-volume sample weighing
• GLP-compliant RS232 serial interface with time-stamped, user-ID-tagged data export (no proprietary software required)
• Embedded application modes: piece counting, percentage weighing, animal/dynamic weighing, net/gross summation, and arithmetic functions (×, ÷)

Sample Compatibility & Compliance

The BSA323S accommodates samples up to 320 g on its 115 mm diameter stainless-steel weighing pan, with optional accessories including draft shield extensions, weighing boats, and density kits. It supports compliance-driven workflows under Good Laboratory Practice (GLP) and Good Manufacturing Practice (GMP) frameworks: all measurement events—including calibration, tare, and result output—are timestamped and logged with operator ID when connected to compliant data management systems. While not certified to ASTM E898 or OIML R76 out-of-the-box, the balance’s repeatability (±1 mg) and linearity (±2 mg) meet typical acceptance criteria for Class II precision balances per USP and ISO 9001 process monitoring. Routine verification using certified test weights (e.g., Class M2 or better) is recommended prior to critical measurements.

Software & Data Management

Data output conforms to standard ASCII protocol over RS232, enabling seamless integration with LIMS, ELN, or custom database systems without middleware. Each transmitted record includes date/time stamp, user identifier (if pre-assigned), gross/net/tare values, unit designation, and application mode flag. The balance supports configurable printout formats (e.g., “Result only”, “Full header + value”) and automatic zero-tracking during idle periods to preserve zero stability. Firmware updates are performed via RS232 using Sartorius-provided utilities; no cloud dependency or subscription service is required. Audit trail functionality is implemented at the host system level—consistent with FDA 21 CFR Part 11 expectations when paired with validated third-party data capture software.

Applications

• Raw material verification in pharmaceutical and chemical manufacturing (e.g., API dispensing, excipient batching)
• Quality assurance testing of packaged goods (net content verification per EU Directive 76/211/EEC)
• Academic teaching labs for stoichiometric calculations, solution preparation, and gravimetric analysis fundamentals
• Food and beverage QC for portion control, yield calculation, and moisture loss tracking
• Environmental lab support for filter weighing in particulate matter (PM10/PM2.5) analysis
• Electronics manufacturing for component count verification and solder paste mass validation

FAQ

What is the difference between BSA323S and BSA323S-CW?
The “CW” suffix denotes internal motorized calibration; the standard BSA323S requires external calibration weights.
Does the BSA323S support connectivity to modern Windows/macOS systems?
Yes—via RS232-to-USB adapter (FTDI chipset recommended); native drivers are not required as it uses standard serial communication.
Can the balance be used for density determination?
Yes—using the optional down-hanging hook and density kit (Sartorius part no. YDK01), it supports solid and liquid density measurement per Archimedes’ principle.
Is the draft shield removable for cleaning?
Yes—the five-sided glass shield is tool-free detachable and compatible with isopropyl alcohol wiping; avoid abrasive cleaners.
How often should calibration be performed?
Per ISO/IEC 17025:2017, calibration frequency must be risk-based; daily verification with a check weight is recommended for regulated environments.