YiHeng LHH-250SDP Drug Stability Testing Chamber
| Brand | YiHeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | LHH-250SDP |
| Temperature Range | 0–70°C |
| Humidity Range | 20–98% RH |
| Temperature Uniformity | ±0.5°C (at 25°C) |
| Humidity Uniformity | ±3% RH (at 60% RH) |
Overview
The YiHeng LHH-250SDP Drug Stability Testing Chamber is an engineered environmental simulation system designed explicitly for pharmaceutical stability studies in compliance with ICH Q1A(R3), Q1B, Q5C, and the Chinese Pharmacopoeia (2020 Edition) stability testing guidelines. It operates on a dual-chamber thermal-hygrometric control architecture, integrating precision P.I.D. algorithms with redundant refrigeration subsystems to maintain stringent temperature (0–70°C) and relative humidity (20–98% RH) setpoints under continuous 24/7 operation. Unlike conventional chambers relying on single-compressor cycling and periodic defrost cycles—which introduce thermal and hygric transients—the LHH-250SDP employs two imported compressors operating in automatic switchover mode, eliminating defrost interruptions and ensuring uninterrupted condition stability over extended durations (≥6 months). Its airflow design features a rear-mounted centrifugal fan with optimized ducted circulation, achieving ≤±0.5°C temperature uniformity and ≤±3% RH uniformity across the 250 L working volume—critical for regulatory-grade bracketing and matrixing protocols.
Key Features
- Dual-Redundant Refrigeration System: Two independent imported compressors automatically alternate based on runtime and load demand, enabling uninterrupted operation without manual intervention or defrost-induced fluctuations—essential for ICH long-term (25°C/60% RH, 12 months) and accelerated (40°C/75% RH, 6 months) protocols.
- High-Stability Environmental Control: Microprocessor-based controller with adaptive P.I.D. tuning delivers real-time correction of thermal/hygrometric drift; 304 stainless steel interior with radius-corner construction ensures cleanability and corrosion resistance per GMP Annex 1 requirements.
- Regulatory-Grade Sensor Suite: High-accuracy capacitive humidity sensor rated for continuous operation at elevated temperatures (up to 70°C); platinum RTD (PT100) temperature sensors calibrated traceably to NIST standards.
- Integrated Safety & Compliance Architecture: Independent over-temperature cut-off circuit with audible/visual alarm; password-protected touchscreen interface; event-logged fault diagnostics with dynamic error code display (e.g., E01 = compressor overload, E07 = sensor failure).
- Expandable Functional Modules: Optional UV-C germicidal lamp (254 nm) mounted on rear wall for periodic chamber decontamination; optional photometric module with calibrated silicon photodiode sensor for real-time light intensity monitoring and closed-loop dimming control (0–6000 lx, ±50 lx accuracy).
Sample Compatibility & Compliance
The LHH-250SDP accommodates standard pharmaceutical packaging formats—including blister packs, HDPE/PP vials, glass ampoules, low-density polyethylene (LDPE) infusion bags, and ophthalmic dropper bottles—within its uniformly conditioned workspace. It supports all ICH-defined storage conditions: long-term (25°C ±2°C / 60% RH ±5%), intermediate (30°C ±2°C / 65% RH ±5%), accelerated (40°C ±2°C / 75% RH ±5%), and photostability (4500 ±500 lx, cool white fluorescent, 10 days). For semi-permeable containers (e.g., LDPE bags), it meets the specific requirement of 40°C ±2°C / 25% RH ±5% per Q1A(R3) Section II.C.3. The chamber’s construction and validation documentation align with ISO 14644-1 (cleanroom classification), ASTM E2875-13 (chamber qualification), and supports IQ/OQ/PQ execution per FDA 21 CFR Part 11 and EU Annex 11 when paired with validated data logging software.
Software & Data Management
The integrated 7-inch TFT resistive touchscreen controller runs embedded Linux firmware supporting up to 100 user-defined programs, each with 1000 programmable segments and 999 loop repetitions. All setpoints, deviations, alarms, and system events are timestamped and stored internally (≥30 days of 1-minute interval data). Via RS-485 Modbus RTU or optional USB-to-RS232 adapter, raw data streams can be exported to third-party LIMS or validated electronic lab notebooks (ELN). The controller includes audit trail functionality with operator ID tagging, change history, and electronic signature support—fully compliant with ALCOA+ principles and suitable for GLP/GMP audits. Optional PC-based software (YiHeng StabilitySuite™) enables remote monitoring, automated report generation (PDF/CSV), and trend analysis aligned with ICH Q5C statistical evaluation frameworks.
Applications
- ICH Q1-compliant stability studies for APIs and finished dosage forms (tablets, capsules, injectables, topicals)
- Accelerated degradation profiling under stress conditions (thermal, humidity, photolytic)
- Package integrity assessment for semi-permeable and permeable primary containers
- Reference standard storage under controlled long-term conditions (25°C/60% RH)
- Method suitability verification for dissolution, assay, and impurity testing protocols
- Environmental qualification of QC laboratory storage areas per USP and
FAQ
Does the LHH-250SDP meet ICH Q1A(R3) and Chinese Pharmacopoeia 2020 stability testing requirements?
Yes. It is specifically engineered to satisfy all mandated temperature, humidity, and photostability test conditions defined in both frameworks—including long-term, accelerated, intermediate, and photostability protocols—with documented uniformity, stability, and recovery performance.
Is the chamber suitable for GMP-regulated environments?
Yes. Its hardware architecture (redundant compressors, independent safety cutoffs), firmware (audit trail, electronic signatures), and validation support package enable full compliance with FDA 21 CFR Part 11, EU Annex 11, and WHO TRS 986 Annex 5 requirements.
Can humidity be maintained accurately at high temperatures (e.g., 40°C/75% RH)?
Yes. The chamber uses a direct-injection humidification system combined with a high-temperature-rated capacitive RH sensor and active dew-point compensation logic—ensuring ±3% RH accuracy even at 40°C.
What validation documentation is provided?
Factory-issued IQ/OQ protocols, calibration certificates for all critical sensors (traceable to NIST), temperature/humidity mapping reports (per ISO 14644-3), and a complete Design Qualification (DQ) summary are included with shipment.
Is remote monitoring and data export supported?
Yes. RS-485 Modbus RTU interface enables integration with SCADA or centralized monitoring systems; optional Ethernet gateway allows secure cloud-based access via HTTPS with TLS 1.2 encryption.
