Jianhu JH-THC Series Temperature and Humidity Controlled Environmental Test Chamber

Overview

The Jianhu JH-THC Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise, repeatable simulation of ambient climatic conditions in laboratory and industrial quality assurance environments. Based on dual-loop PID control architecture with independent temperature and humidity regulation systems, the chamber employs high-efficiency air-cooled refrigeration combined with steam-based humidification and solid-state dehumidification to maintain stable setpoints across its operational range. Designed in strict accordance with ICH Q1A(R2), USP , and ISO 14644-3 environmental validation requirements, it serves as a foundational platform for stability testing of pharmaceuticals, medical devices, electronic components, polymers, and food packaging materials. Its upright vertical configuration optimizes floor space utilization while supporting ergonomic sample loading and thermal mass distribution—critical for minimizing gradient-induced measurement variance during long-term exposure protocols.

Key Features

• Dual independent PID controllers for simultaneous, decoupled regulation of temperature and relative humidity—ensuring minimal cross-talk and high reproducibility over extended test durations.
• Air-cooled condensing system with eco-friendly R134a refrigerant, integrated with variable-speed compressors and optimized fin-tube heat exchangers to reduce energy consumption by up to 22% compared to conventional single-stage units.
• Steam-humidification system featuring stainless-steel boiler and precision solenoid valve control, delivering rapid RH ramping without condensation risk or mineral deposition.
• Multi-segment programmable controller (up to 99 cycles, 24 segments per cycle) compliant with ASTM E145-22 Annex A4 for complex environmental profiles including diurnal cycling, seasonal simulation, and accelerated aging sequences.
• Interior constructed from 304 stainless steel with seamless welding and rounded corners; exterior housing in powder-coated cold-rolled steel for corrosion resistance and cleanroom-compatible surface finish.
• Real-time monitoring interface with optional Ethernet/RS485 connectivity, supporting Modbus TCP protocol for integration into centralized lab management systems (LIMS) and MES platforms.

Sample Compatibility & Compliance

The JH-THC chamber accommodates diverse sample geometries through customizable internal dimensions (standard base: W600 × D500 × H700 mm; extended options available). It supports standard stability test packages—including blister packs, HDPE bottles, aluminum foil pouches, and glass vials—without airflow obstruction or localized condensation. All operational parameters are traceable to NIST-traceable reference standards via built-in calibration ports. The system complies with regulatory documentation requirements under FDA 21 CFR Part 11 (when paired with validated software), EU Annex 15, and WHO Technical Report Series No. 992. Validation documentation—including IQ/OQ/PQ templates, uncertainty budgets, and sensor placement rationale—is provided to support GMP/GLP audits.

Software & Data Management

Equipped with Jianhu’s proprietary TH-Control Suite v3.2, the chamber enables secure user-role-based access (administrator, operator, reviewer), electronic signature capture, and full audit trail logging—including parameter changes, alarm events, and manual interventions. Data export formats include CSV, PDF reports with embedded metadata (timestamp, operator ID, chamber ID), and XML for LIMS ingestion. Optional cloud synchronization allows remote monitoring via TLS-encrypted HTTPS connection, with local data caching ensuring continuity during network outages. All firmware updates undergo rigorous regression testing against ISO/IEC 17025-compliant verification protocols prior to release.

Applications

• Pharmaceutical stability studies per ICH Q5C and Q1E guidelines, including real-time (25 °C/60% RH) and accelerated (40 °C/75% RH) protocols for shelf-life estimation.
• Package integrity validation—assessing moisture vapor transmission rates (MVTR) of barrier films and seal strength degradation under cyclic humidity stress.
• Electronics reliability screening—evaluating solder joint fatigue, conformal coating delamination, and capacitor leakage current drift under thermal-hygric cycling.
• Polymer aging analysis—monitoring tensile strength loss, discoloration, and dimensional change in elastomers and thermoplastics exposed to controlled humidity gradients.
• Biological reagent storage qualification—verifying stability of lyophilized antibodies, PCR master mixes, and enzyme formulations at defined温湿度 setpoints.

FAQ

What is the recommended calibration frequency for this chamber?
Annual calibration is advised per ISO/IEC 17025; however, internal verification using NIST-traceable handheld sensors should be performed before each critical test run.
Can the chamber operate continuously for 180-day stability studies?
Yes—the system features redundant safety interlocks, continuous compressor duty-cycle monitoring, and predictive maintenance alerts based on runtime and thermal load history.
Is third-party validation support available?
Jianhu provides IQ/OQ/PQ execution services through ISO 17025-accredited partners, including protocol development, witness testing, and final compliance sign-off.
Does the controller support custom alarm logic (e.g., deviation >±1.5°C for >30 min)?
Yes—user-defined alarm thresholds, delay timers, and escalation pathways (email/SMS) are configurable within the TH-Control Suite.
How is humidity uniformity verified during qualification?
Per ISO 16730-2, 9-point sensor mapping is conducted at three vertical levels using Class A platinum RTDs; spatial variation must remain within ±3% RH across all monitored positions.