Jianhu Instruments JH-TH Series Programmable Temperature and Humidity Environmental Test Chamber

Overview

The Jianhu Instruments JH-TH Series Programmable Temperature and Humidity Environmental Test Chamber is an engineered solution for controlled environmental simulation in research laboratories, quality assurance departments, and product reliability testing facilities. Designed around a robust air-cooled refrigeration architecture and precision PID-controlled steam humidification system, the chamber maintains stable thermal and hygric conditions across its operational envelope—enabling repeatable evaluation of material behavior, component integrity, and packaging performance under defined climatic stress. Unlike generic climate chambers optimized for broad-range extremes, the JH-TH Series focuses on high-fidelity stability within the biologically and industrially critical mid-range zone (15–45°C / 30–98% RH), where many pharmaceutical stability protocols (ICH Q1A–Q1E), electronic component aging standards (IEC 60068-2-30), and polymer conditioning tests (ASTM D618) are executed. Its benchtop form factor supports integration into ISO/IEC 17025-accredited labs without requiring dedicated HVAC infrastructure.

Key Features

• Programmable multi-segment cycling capability with up to 99 cycles and 999 steps per cycle, supporting complex test profiles per MIL-STD-810H, GB/T 2423.3–2016, and JEDEC JESD22-A101.
• Air-cooled condensing system with hermetically sealed compressor—designed for continuous operation with minimized maintenance intervals and reduced ambient heat load.
• Steam-based humidification with stainless-steel boiler and dry-steam distribution manifold, eliminating water droplet carryover and ensuring contamination-free exposure for sensitive electronics and optical components.
• Double-wall insulated chamber construction with high-density polyurethane foam (≥80 mm thickness) and electrostatically coated steel exterior, achieving thermal leakage <0.8 K/h at 40°C/95% RH.
• Real-time monitoring via 7-inch TFT touchscreen interface with embedded data logging (internal SD card, ≥16 GB), configurable alarm thresholds, and password-protected parameter locking for GLP/GMP compliance.
• Modular internal volume design: standard configurations range from 50 L to 500 L; custom dimensions available upon engineering review to meet ISO 17025 spatial uniformity requirements.

Sample Compatibility & Compliance

The JH-TH Series accommodates diverse sample geometries—including PCB assemblies, medical device packaging, polymer films, battery cells, and pharmaceutical blister packs—within its uniformly conditioned workspace. All models undergo factory calibration against NIST-traceable reference sensors (Rotronic HC2-S, Fluke 1524) and comply with temperature and humidity uniformity verification procedures outlined in ASTM E744-18 and IEC 60068-3-5. The chamber’s control algorithm meets the stability criteria required for long-term stability studies under ICH Q5C and USP , with documented traceability to measurement uncertainty budgets. Optional validation packages include IQ/OQ documentation templates aligned with FDA 21 CFR Part 11 Annex 11 expectations for electronic records and signatures.

Software & Data Management

Jianhu’s proprietary TH-Control Suite (v4.2+) enables remote configuration, real-time graphing, and automated report generation (PDF/CSV). The software supports audit trail functionality with user-level access controls, session timestamps, and change logs—fully compliant with ALCOA+ principles for data integrity. Exported datasets include timestamped sensor readings (temperature, relative humidity, chamber pressure), setpoint history, and alarm event logs. Integration with LIMS platforms is achieved via Modbus TCP or OPC UA protocols. Firmware updates are delivered through secure HTTPS channels with SHA-256 signature verification, ensuring firmware authenticity and version traceability.

Applications

• Accelerated aging of polymer-based medical devices per ISO 11607-1 and AAMI TIR17.
• Stability testing of lyophilized biologics and small-molecule APIs under ICH Q1A(R3) long-term and accelerated conditions.
• Environmental stress screening (ESS) of automotive ECUs per SAE J2245 and GMW14872.
• Moisture barrier evaluation of flexible packaging materials (e.g., AlOx-coated PET) using gravimetric moisture transmission rate (MVTR) correlation protocols.
• Pre-conditioning of lithium-ion battery cells prior to charge/discharge cycling per IEEE 1625 and UL 1642.
• Calibration verification of portable hygrometers and thermometers in metrology labs accredited to ISO/IEC 17025.

FAQ

What is the maximum allowable load mass for thermal stability testing?
The chamber maintains specified uniformity and fluctuation tolerances with up to 20% chamber volume occupied by non-heat-generating samples. For thermally active loads (e.g., powered PCBs), derating calculations must be performed per IEC 60068-3-6 Annex B.
Does the system support external sensor input for product-core temperature monitoring?
Yes—four isolated analog inputs (0–5 V DC) are provided for integrating third-party PT100 or thermocouple probes, with synchronized logging in TH-Control Suite.
Is the humidification system compatible with deionized water only?
Yes. Operation requires DI water (resistivity ≥1 MΩ·cm) to prevent scale formation and ensure boiler longevity. An optional integrated DI water generator module is available.
Can the chamber be validated per GAMP5 guidelines?
Full GAMP5-compliant validation support—including URS, FRS, DQ/IQ/OQ/PQ protocols and raw data archives—is available through Jianhu’s certified validation services team.
What is the expected service life of the compressor under continuous operation?
With scheduled preventive maintenance (biannual oil analysis and filter replacement), the air-cooled scroll compressor demonstrates MTBF ≥15,000 hours per ISO 13374-1.