Sartorius Specialized OEM Load Cell Series WZA26-HC

Overview

The Sartorius Specialized OEM Load Cell Series—exemplified by the WZA26-HC—is a purpose-engineered family of high-precision force transducers designed exclusively for original equipment manufacturers integrating weighing functionality into mission-critical automation systems. Built upon Sartorius’ proprietary Monolithic (Super-Cell®) sensor architecture, these load cells eliminate traditional mechanical linkages and multi-component strain gauge assemblies, delivering superior long-term stability, minimal creep, and exceptional resistance to off-axis loading and thermal drift. The WZA26-HC model provides a nominal capacity of 20 g with a resolution of 0.001 mg—making it particularly suited for applications demanding ultra-fine mass discrimination, such as automated pipette calibration stations, micro-dosing modules in pharmaceutical fill-and-finish lines, and closed-loop gravimetric control in liquid dispensing robots. Its compact form factor, stainless steel housing, and robust mechanical interface facilitate seamless integration into space-constrained OEM enclosures without compromising metrological integrity.

Key Features

• Monolithic (Super-Cell®) sensing element: Single-piece, stress-optimized stainless steel structure ensuring high linearity (<±0.01% FS), repeatability (<±0.005% FS), and temperature stability (≤0.01 µV/V/°C).
• Hermetically sealed stainless steel housing: Corrosion-resistant construction compliant with ISO 9001–certified manufacturing processes; standard IP44 ingress protection; optional IP68 rating available for WZA25-NC via VF6825 configuration.
• Ultra-fast dynamic response: Optimized analog signal path enables settling times ≤300 ms (validated per ASTM E467-15 for dynamic load testing), supporting high-throughput calibration cycles and real-time feedback control.
• OEM-optimized electrical interface: Standard mV/V output (2.0 mV/V nominal) with low-noise shielded cabling; compatible with industrial-grade signal conditioners and PLC analog input modules meeting IEC 61000-4 EMC requirements.
• Traceable metrology: Each unit supplied with individual calibration certificate traceable to national standards (NIM, China) and optionally to PTB or NIST via Sartorius Calibration Services.

Sample Compatibility & Compliance

This load cell series is not intended for direct end-user operation but functions as an embedded component within larger systems subject to regulatory oversight. It is routinely integrated into equipment falling under FDA 21 CFR Part 11, EU Annex 11, and ISO 13485 frameworks—particularly in pharmaceutical secondary packaging lines, automated QC laboratories, and ISO Class 5–7 cleanroom-compatible robotics. While the sensor itself does not carry CE marking independently, its design conforms to EN 61326-1 (EMC) and EN 61000-6-2/6-3 when installed per Sartorius OEM Integration Guidelines. For applications requiring full auditability, the WZA-series supports integration with Sartorius Proline+ or Cubis® II-based data acquisition environments enabling ALCOA+ compliant electronic records.

Software & Data Management

As a hardware-only OEM component, the WZA26-HC does not include embedded firmware or user-facing software. However, its analog output is fully interoperable with third-party SCADA, MES, and PLC platforms (e.g., Siemens SIMATIC, Rockwell Allen-Bradley, Beckhoff TwinCAT). When paired with Sartorius-certified signal conditioning modules (e.g., YK-2000 series), it enables seamless connection to Sartorius LabX® software for centralized calibration management, statistical process monitoring (SPC), and automated report generation aligned with ISO/IEC 17025 and USP requirements. All calibration data—including raw mV readings, temperature compensation coefficients, and linearity corrections—is stored in non-volatile memory on the signal conditioner, supporting full GLP/GMP audit trails.

Applications

• Pipette calibration systems requiring traceable gravimetric verification per ISO 8655-6 and CLSI EP10-A3.
• Automated liquid handlers performing low-volume dispensing (1–100 µL) where real-time mass feedback improves volumetric accuracy.
• GMP-compliant powder micro-dosing units in solid oral dosage manufacturing.
• Robotic arms equipped with end-effector weighing for adaptive payload compensation and collision avoidance logic.
• In-line gravimetric fill verification in sterile vial and syringe filling lines operating under Grade A environments.

FAQ

Is the WZA26-HC certified for use in regulated pharmaceutical manufacturing?
It is designed and validated for integration into Class A/B/C/D cleanroom equipment per ISO 14644-1 and supports compliance with EU GMP Annex 1 when implemented with appropriate system-level controls.
Can the WZA26-HC be calibrated in-house using standard weights?
Yes—calibration follows ISO/IEC 17025 procedures using Class E2 or better reference masses; Sartorius provides OEM-specific calibration protocols and uncertainty budgets upon request.
What is the recommended excitation voltage and cable length limit?
Nominal excitation is 5 V DC; maximum recommended cable length is 30 m using twisted-pair, foil-shielded cable (AWG 24) to maintain signal integrity and noise immunity.
Does Sartorius provide mechanical mounting templates or CAD models?
Yes—STEP and IGES files, along with torque specifications and thermal expansion allowances, are available under NDA to qualified OEM partners.
How is long-term stability verified during production?
Each unit undergoes 72-hour thermal soak testing at 40°C and cyclic load endurance validation (≥1 million cycles at 100% FS) prior to shipment.