Shanghai Hengyi SHH-400YD / SHH-250YD / SHH-150YD Temperature and Humidity Controlled Stability Chamber

Overview

The Shanghai Hengyi SHH Series Temperature and Humidity Controlled Stability Chambers are engineered for precision-controlled environmental simulation in pharmaceutical stability testing, adhering strictly to ICH Q1 guidelines and national standards including JB/T 6823–1993 “Technical Specifications for Artificial Bioclimatic Test Chambers.” These chambers implement dual-loop PID control architecture for independent regulation of temperature and relative humidity, enabling reproducible long-term (25 °C/60% RH, 30 °C/65% RH) and accelerated (40 °C/75% RH) stability protocols required by regulatory submissions to the FDA, EMA, and NMPA. The chamber’s insulated double-wall construction—featuring high-density polyurethane foam insulation and sealed vapor barrier—minimizes thermal bridging and ensures stable setpoint maintenance across full operational load cycles. Air circulation employs a low-turbulence, backward-curved centrifugal blower with adjustable airflow distribution, guaranteeing uniform environmental conditions throughout the working chamber volume as verified per ISO 16770:2017 Annex B.

Key Features

• Dual-channel digital PID controllers with real-time setpoint programming and ramp-soak profiles for ICH-compliant test sequences
• Independent over-temperature cut-off circuit with mechanical thermostat backup, compliant with IEC 61000-4-2/4-4 immunity requirements
• Tempered double-glazed observation window with anti-fog coating and integrated LED interior lighting for non-intrusive sample monitoring
• Modular panel assembly with electrostatically applied polyester powder coating (RAL 7035), enabling field serviceability and structural rigidity
• Integrated thermal printer (RS-232 interface) supporting time-stamped printout of temperature/humidity logs or trend curves (optional USB data export)
• Short-circuit and ground-fault protected power distribution with dedicated GFCI circuit for laboratory-grade electrical safety
• Calibration-ready design: traceable sensor ports for external NIST-traceable hygrometer and thermistor verification

Sample Compatibility & Compliance

The SHH series accommodates standard ICH-compliant packaging configurations—including blister packs, HDPE bottles, aluminum tubes, and glass vials—on adjustable stainless-steel shelving (load capacity: 15 kg/shelf). Chamber interiors meet ISO 14644-1 Class 8 cleanroom particulate limits under static conditions. All models comply with Good Manufacturing Practice (GMP) Annex 15 requirements for qualification documentation, including Installation Qualification (IQ), Operational Qualification (OQ), and Performance Qualification (PQ) templates. Environmental validation supports 21 CFR Part 11-compliant electronic records when paired with optional audit-trail-enabled software (sold separately). Humidity generation utilizes ultrasonic nebulization with deionized water feed, avoiding steam sterilization interference and minimizing mineral deposition on sensors.

Software & Data Management

Standard firmware includes configurable alarm thresholds (deviation >±1 °C or >±3% RH for >30 min), event logging with timestamp and operator ID fields, and password-protected parameter modification. Optional PC-based software (SHH-Link v3.2) provides GLP-compliant data acquisition at 1-minute intervals, automated report generation per WHO TRS 953 Annex 6, and CSV/PDF export compatible with LIMS integration. Data integrity safeguards include write-once archive mode, electronic signature support, and encrypted local storage (AES-256). Firmware updates are delivered via signed USB firmware packages validated against SHA-256 checksums.

Applications

• ICH Q1A(R3) long-term, intermediate, and accelerated stability studies for API and finished dosage forms
• Bacterial and mammalian cell culture incubation under controlled humidity (e.g., mycoplasma detection media conditioning)
• Seed germination and plant tissue culture under defined thermo-hygrometric regimes
• Fermentation process development requiring stable sub-ambient to 60 °C environments
• Accelerated aging of polymer-based medical device packaging per ASTM F1980
• Reference standard storage per USP “Packaging and Storage Requirements”

FAQ

What regulatory standards does the SHH series support for pharmaceutical stability testing?
The chambers are designed to fulfill ICH Q1A(R3), Q5C, and Q5D; align with USP , , and ; and comply with national standard JB/T 6823–1993. Full PQ documentation meets FDA and EMA expectations for submission-ready environmental qualification.
Is humidity control available below 50% RH?
No—the operational humidity range is fixed at 50–85% RH per design intent for ICH stability protocols. Sub-50% RH capability requires optional desiccant-based dehumidification modules (not included in base configuration).
Can the chamber be qualified for GMP production environments?
Yes. The system supports full GMP qualification (IQ/OQ/PQ) with documented calibration certificates for PT100 temperature sensors and capacitive RH transducers, all traceable to NIM (China National Institute of Metrology) standards.
What maintenance intervals are recommended for long-term reliability?
Monthly visual inspection of door gaskets and nebulizer reservoir; quarterly cleaning of condensate drain line and air filter; annual verification of humidity sensor drift (±2% RH tolerance) and temperature uniformity mapping per ISO 16770.
Is remote monitoring supported via Ethernet or Wi-Fi?
Ethernet (TCP/IP) connectivity is available via optional communication module (SHH-Net), enabling SNMP-based network alerts and Modbus TCP integration with building management systems. Wi-Fi is not supported due to electromagnetic interference risks in regulated labs.