YSEI SHH-500SD Temperature and Humidity Controlled Stability Testing Chamber

Overview

The YSEI SHH-500SD Temperature and Humidity Controlled Stability Testing Chamber is an ICH-compliant environmental test system engineered for pharmaceutical stability studies in accordance with ICH Q1A(R3), Q1B, Q5C, and relevant sections of USP <1151>, EP 2.9.40, and Chinese Pharmacopoeia Chapter 9001. It implements dual-loop PID control architecture for independent regulation of temperature and relative humidity, utilizing air-jacketed heating for rapid thermal response and compressor-based refrigeration for precise sub-ambient cooling capability. The chamber maintains stable setpoint conditions across its full operational envelope—critical for long-term (25 °C/60 %RH), accelerated (40 °C/75 %RH), and intermediate (30 °C/65 %RH) storage condition protocols. Its design adheres to Good Manufacturing Practice (GMP) and Good Laboratory Practice (GLP) requirements for data integrity, traceability, and environmental reproducibility in regulated drug development workflows.

Key Features

• Air-jacketed heating system ensures uniform thermal distribution and minimizes internal gradients during prolonged operation
• Compressor-driven refrigeration enables reliable dehumidification and sub-ambient temperature control down to 15 °C at high RH levels
• Externally mounted humidification reservoir reduces internal condensation risk and simplifies maintenance without interrupting ongoing studies
• Dual independent PID controllers provide real-time compensation for load changes, door openings, and ambient fluctuations
• Integrated thermal cut-off protection, dry-run safeguard for humidifier, and compressor overcurrent monitoring ensure uninterrupted compliance-grade operation
• Low-noise mechanical design achieves ≤55 dB(A) at 1 m distance—suitable for shared laboratory environments requiring continuous 24/7 operation
• Energy-optimized thermal insulation and adaptive power modulation reduce average energy consumption by up to 28% versus conventional stability chambers

Sample Compatibility & Compliance

The SHH-500SD accommodates standard ICH-compliant stability sample configurations—including open trays, sealed vials, blister packs, and IV bags—within its 500 L working volume. Its validated temperature uniformity (±2 °C) and humidity accuracy (±5 %RH) meet the acceptance criteria defined in FDA Guidance for Industry: “Stability Testing of Drug Substances and Products” (2022) and ICH Q5C Annex 1. The chamber supports low-humidity testing profiles such as 40 °C / 20 %RH required for large-volume parenterals (LVPs), with verified performance under worst-case load conditions. All control logic and alarm events are timestamped and stored internally with audit trail functionality compliant with 21 CFR Part 11 requirements when paired with optional software validation packages.

Software & Data Management

The SHH-500SD includes a built-in thermal printer supporting configurable print intervals (1 min to 24 h) for continuous hard-copy recording of temperature and humidity trends—providing legally admissible documentation per ALCOA+ principles. Printed output includes date/time stamps, setpoints, measured values, deviation alerts, and operator ID fields. Internal memory retains ≥30 days of second-by-second data (expandable via USB export). Optional Ethernet-enabled data logging modules support integration into enterprise LIMS or MES platforms, enabling remote monitoring, automated report generation, and electronic signature workflows aligned with GxP documentation standards.

Applications

• ICH Q1A(R3)-mandated long-term, accelerated, and intermediate stability studies for APIs and finished dosage forms
• Photostability pre-screening under controlled dark conditions (optional light module available)
• Accelerated aging tests for packaging compatibility and container closure integrity assessment
• Reference standard storage under certified environmental conditions (e.g., 2–8 °C equivalents with humidity control)
• Biological product stability evaluation under stress conditions including low-RH desiccation cycles
• Method validation support for dissolution, assay, and impurity profiling where environmental consistency impacts analytical outcomes

FAQ

Does the SHH-500SD comply with 21 CFR Part 11 for electronic records?
Yes—when configured with optional audit-trail-enabled firmware and user access controls, it satisfies electronic signature and record retention requirements for regulated submissions.
What is the minimum humidity achievable at 40 °C?
The system reliably achieves and maintains 20 %RH at 40 °C, validated per ICH Q1B Annex II for low-humidity stability protocols.
Is external calibration support available?
YSEI provides NIST-traceable calibration certificates and on-site IQ/OQ/PQ qualification services through authorized regional partners.
Can multiple units be centrally monitored?
Yes—via optional TCP/IP network interface and centralized dashboard software supporting up to 32 connected chambers with unified alarm routing and historical trend comparison.
What ambient conditions are required for installation?
Operating environment must maintain 5–35 °C ambient temperature and ≤85 %RH non-condensing humidity; minimum clearance of 100 mm on all sides is required for heat dissipation.