Sartorius CPA1003S Precision Balance

Overview

The Sartorius CPA1003S Precision Balance is an ISO/GLP-compliant laboratory balance engineered for high-reproducibility mass measurement in routine analytical, quality control, and research environments. Designed and manufactured in Germany, it employs a patented monolithic weighing sensor architecture—eliminating mechanical joints and thermal drift sources—to deliver long-term stability and metrological integrity. With a 1000 g capacity and 1 mg readability, the CPA1003S operates within a rigorously controlled temperature and humidity envelope to maintain traceable accuracy across daily use cycles. Its core functionality centers on deterministic mass determination via electromagnetic force compensation (EMFC), where load-induced displacement is actively nullified by a precisely regulated current through a coil suspended in a permanent magnetic field. This principle ensures linearity, minimal hysteresis, and immunity to gravitational fluctuations across standard lab installations.

Key Features

• Internal calibration with isoCAL technology: Fully automated, motor-driven calibration using built-in reference masses; triggered manually or scheduled at user-defined intervals to maintain compliance with ISO 9001, ISO/IEC 17025, and pharmacopeial requirements.
• Monolithic sensor design: A single-piece, stress-relieved alloy transducer minimizes creep, improves shock resistance, and extends service life under continuous operation.
• Backlit LCD display with 16 mm digit height: Ensures legibility under variable ambient lighting conditions, including laminar flow hoods and low-illumination storage areas.
• RS-232C bidirectional interface: Enables seamless data transfer to PCs, LIMS, or ERP systems; supports ASCII and Sartorius-specific protocols for audit-ready traceability.
• Preloaded application modes: Includes percentage weighing, net weight summation, animal weighing (dynamic averaging), unit conversion (g, oz, ct, dwt, etc.), and piece counting—each configurable with user-defined tolerances.
• GLP-compliant documentation: Timestamped weight records with operator ID, balance ID, and environmental metadata (when connected to optional environmental sensors); compatible with Sartorius YDP03-0CE and YDP20-0CE printers for hard-copy audit trails.

Sample Compatibility & Compliance

The CPA1003S accommodates a broad range of sample types—from powders and granules to small hardware components—on its Ø110 mm stainless steel pan. Its draft shield compatibility (sold separately) enables stable measurements of low-density or electrostatic-prone materials. All firmware and hardware configurations adhere to EU Directive 2014/30/EU (EMC), 2014/35/EU (LVD), and RoHS 2011/65/EU. For regulated industries, the balance supports 21 CFR Part 11–compliant electronic signatures when integrated with validated Sartorius LabX software (not included). Calibration certificates are NIST-traceable and issued per ISO/IEC 17025-accredited procedures upon request.

Software & Data Management

While the CPA1003S operates autonomously via front-panel controls, its RS-232C port enables integration into centralized data ecosystems. When connected to a PC running Sartorius’ free DataTransfer software, users can configure automatic data logging, generate CSV exports, and apply custom formatting rules for regulatory submissions. For GMP environments, LabX software provides full ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate + Complete, Consistent, Enduring, Available) data governance—including electronic signature workflows, role-based access control, and immutable audit trails. Printer outputs include GLP headers with date/time stamps, balance serial number, operator code, and calibration status.

Applications

This balance serves as a primary mass standard in pharmaceutical QC labs for assay preparation, excipient dispensing, and tablet weight uniformity testing per USP and Ph. Eur. 2.1.3. It is routinely deployed in chemical synthesis labs for stoichiometric reagent dosing, in food testing facilities for moisture content determination (per AOAC 950.46), and in academic research for gravimetric analysis of catalysts or nanomaterials. Its repeatability (≤ ±0.001 g) and linearity (≤ ±0.002 g) meet ASTM E898-20 criteria for Class II precision balances used in non-critical but documented weighing tasks.

FAQ

Does the CPA1003S support external calibration with user-provided weights?
Yes—while isoCAL provides internal calibration, the balance accepts external calibration via certified weights traceable to national standards; this mode is required for periodic verification per ISO 17025.

Is the RS-232C interface compatible with modern Windows/macOS systems?
Yes—using a USB-to-RS-232 adapter (e.g., FTDI chipset-based), the interface functions with DataTransfer or LabX on Windows 10/11 and macOS 12+. Driver installation is required.

Can the CPA1003S be integrated into a networked LIMS environment?
Yes—via serial-to-Ethernet converters or LabX middleware, it supports HL7, ASTM E1384, and custom API integrations for real-time data ingestion into enterprise systems.

What is the recommended recalibration frequency under GLP conditions?
Daily zero-point verification is mandatory; internal isoCAL calibration should be performed at least once per shift or after significant ambient temperature changes (>2 °C).

Is the monolithic sensor repairable in the field?
No—the sensor is sealed and non-serviceable; however, Sartorius offers factory recalibration and sensor replacement under warranty or extended service contracts.