WEISS WK Walk-in Temperature and Humidity Controlled Chamber

Overview

The WEISS WK Walk-in Temperature and Humidity Controlled Chamber is an engineered environmental simulation system designed for long-term stability testing under strictly regulated conditions. Built upon decades of German precision engineering, the WK series implements a dual-loop control architecture—separately regulating temperature and relative humidity via independent refrigeration, electric heating, and ultrasonic humidification subsystems. This architecture ensures high reproducibility in pharmaceutical stability studies conducted per ICH Q1A(R3), Q5C, and Q6B guidelines, as well as compliance with USP , ISO 14644-3, and EU Annex 1 requirements for controlled environment qualification. The chamber’s structural integrity relies on seamless CFC-free polyurethane insulation (≥120 mm thickness), minimizing thermal bridging and supporting stable gradient performance across its full internal volume—from 4 m³ to 41 m³—without reliance on external water supply or steam generation.

Key Features

• Robust walk-in architecture with double-skinned stainless steel interior and electro-galvanized outer casing for corrosion resistance and cleanroom-compatible surface finish.
• Microprocessor-based controller with real-time data logging, password-protected user levels, electronic audit trail, and full traceability aligned with FDA 21 CFR Part 11 and GAMP 5 validation principles.
• Ultrasonic humidification system delivering precise, particle-free moisture without mineral deposits or maintenance-intensive steam generators.
• Refrigerant-based dehumidification integrated with air-cooled condensing units—optimized for continuous operation at low-load humidity setpoints (e.g., 20 %RH at +25 °C).
• Dual independent PT100 temperature sensors (chamber air and sample zone) with automatic deviation alerting and configurable alarm thresholds.
• Emergency mechanical door release mechanism compliant with EN 1761 and ISO 13857 safety standards—ensuring operator egress without power dependency.
• Zero-maintenance humidity sensing using capacitive polymer sensors calibrated traceably to NIST standards; no periodic recalibration required under normal operating conditions.

Sample Compatibility & Compliance

The WK chamber accommodates diverse sample configurations—including stacked pallets, open shelving, climate-controlled cabinets, and custom racking—while maintaining spatial uniformity within ±1 °C and ±3 %RH (time-weighted) across all defined test zones (per ISO 14644-3 mapping protocols). It supports qualification documentation packages (DQ/IQ/OQ/PQ) and is routinely deployed in GMP-regulated environments for ICH-compliant accelerated and long-term stability programs. All electrical components meet CE, UL 61010-1, and ATEX Zone 2 certification requirements. Environmental compliance includes adherence to RoHS 2011/65/EU and REACH SVHC restrictions, with full material declarations available upon request.

Software & Data Management

The embedded control software provides local HMI operation with optional Ethernet/IP or Modbus TCP connectivity for integration into centralized SCADA or MES platforms. Data export supports CSV, PDF, and XML formats—with timestamped records including sensor values, setpoint history, alarm events, and user actions. Electronic signatures, role-based access control (RBAC), and immutable audit trails satisfy ALCOA+ data integrity criteria. Optional validation support includes IQ/OQ protocol templates, calibration certificates (traceable to DAkkS-accredited labs), and cybersecurity hardening per IEC 62443-3-3.

Applications

• Pharmaceutical stability testing (ICH Q1–Q5 series) for APIs, drug products, and packaging systems.
• Biological storage condition verification for vaccines, monoclonal antibodies, and cell therapies.
• Electronics reliability screening under combined thermal-humidity stress (e.g., JEDEC JESD22-A110).
• Material aging studies for polymers, adhesives, and composites per ASTM D4329 and ISO 4892-2.
• Calibration laboratory environmental conditioning for reference standard storage and metrology-grade measurement.
• Regulatory submission-ready environmental data generation for FDA, EMA, PMDA, and Health Canada dossiers.

FAQ

What validation documentation is provided with the WK chamber?
Standard delivery includes Factory Acceptance Test (FAT) report, calibration certificates for all critical sensors (NIST-traceable), and a complete set of GAMP 5-aligned validation deliverables (DQ template, IQ/OQ protocols, and PQ guidance)—all customizable for site-specific requirements.
Can the chamber be qualified for 24/7 operation in a Grade C cleanroom?
Yes—the WK series meets ISO 14644-1 Class 8 (ISO Class 100,000) ambient compatibility and supports HEPA-filtered recirculation options; full cleanroom integration requires optional pressure cascade and differential airflow modules.
Is remote monitoring supported without compromising 21 CFR Part 11 compliance?
Yes—secure TLS 1.2-enabled web interface and API access are available, with full electronic signature enforcement, session timeout controls, and encrypted data-at-rest—all validated as part of the system’s Part 11 compliance package.
How often do humidity sensors require recalibration?
Capacitive polymer humidity sensors are factory-calibrated and specified for drift <±0.5 %RH/year under typical operating conditions; no scheduled recalibration is mandated per manufacturer specifications or ISO/IEC 17025 recommendations.
Does WEISS offer IQ/OQ services outside Germany?
Yes—certified field service engineers operate globally across North America, APAC, and EMEA regions, delivering on-site installation, commissioning, and regulatory-compliant qualification with documented evidence per client SOPs.