English Product Name

Overview

The Wuhan Constant Temperature & Humidity Environmental Test Chamber is an engineered environmental simulation system designed for precise, repeatable evaluation of material and product performance under controlled thermal and hygrothermal stress conditions. Utilizing a dual-stage hermetic refrigeration architecture with R404A/R23 refrigerant blends, the chamber achieves stable operation across an extended temperature range from –70°C to +150°C and a humidity range of 20–98% RH (with optional expansion to 5–98% RH). Its core measurement principle relies on high-fidelity feedback control of conditioned air via PID-regulated heating, cooling, humidification, and dehumidification subsystems—ensuring compliance with internationally recognized environmental testing standards including IEC 60068-2 series, MIL-STD-810G, and GB/T 2423 series. The chamber’s structural integrity, thermal inertia management, and airflow uniformity are optimized to minimize spatial gradients and transient overshoot—critical for qualification testing in aerospace, automotive electronics, medical device packaging, and polymer aging studies.

Key Features

• Color LCD touchscreen controller with real-time graphical display, data logging, and bilingual (English/Chinese) interface for global laboratory integration.
• SUS#304 stainless steel construction for both internal chamber and outer casing—resistant to corrosion, oxidation, and long-term exposure to condensation and aggressive test atmospheres.
• Dual-layer high-tension silicone gasket sealing system between door and frame, ensuring leak-tight integrity and minimizing humidity loss during cyclic tests.
• Multi-layer insulated observation window with integrated conductive film heater—prevents fogging and enables unobstructed visual monitoring of samples during operation.
• Standard 50 mm diameter cable port (left-side mounted) with removable rubber plug—facilitating external power/signal connections without compromising chamber seal integrity.
• Integrated safety architecture: real-time fault detection (over-temperature, over-humidity, compressor failure, sensor drift), automatic power cutoff, and on-screen alarm diagnostics per IEC 61000-4-5 surge immunity requirements.

Sample Compatibility & Compliance

The chamber accommodates diverse sample geometries through six standard internal volume configurations—from 80 L to 1000 L—with customizable internal dimensions upon request. Its airflow design ensures uniform distribution across load zones, validated per ISO 16750-4 Annex A for automotive component testing and ASTM E145 Class II specifications. All models meet mandatory regulatory alignment for environmental qualification under MIL-STD-810G Method 502.5 (Low Temperature), Method 501.5 (High Temperature), Method 507.5 (Humidity), and Method 506.5 (Temperature Shock). Documentation packages support GLP/GMP audit readiness, including factory calibration certificates traceable to NIST-equivalent national metrology institutes, and full compliance with IEC 61000-6-2 (EMC Immunity) and IEC 61000-6-4 (EMC Emission) directives.

Software & Data Management

The embedded controller supports USB export of time-stamped temperature/humidity profiles (CSV format), with optional Ethernet or RS-485 Modbus RTU connectivity for SCADA integration. Remote monitoring and parameter adjustment are enabled via secure web interface (HTTPS) compatible with enterprise LIMS platforms. Audit trail functionality complies with FDA 21 CFR Part 11 requirements—including electronic signatures, user access levels (admin/operator), and immutable event logs for all setpoint changes, alarm triggers, and manual overrides. Data retention supports ≥30 days of continuous 1-second interval recording, extendable via external NAS or cloud-based archival systems.

Applications

• Accelerated aging of polymer composites, adhesives, and encapsulants under combined thermal cycling and humidity exposure.
• Reliability validation of PCB assemblies, sensors, and battery modules per AEC-Q200 and IPC-9701 standards.
• Stability testing of pharmaceutical primary packaging (blister packs, vials) per ICH Q1A(R2) and USP .
• Environmental stress screening (ESS) of military-grade avionics prior to HALT/HASS protocols.
• Material coefficient of thermal expansion (CTE) characterization via dimensional metrology within stabilized chambers.
• Validation of HVAC filter media performance under high-humidity loading conditions.

FAQ

What temperature and humidity ranges are standard across all models?

Standard configuration supports –20°C to +150°C and 20–98% RH; extended ranges (–70°C min, 5–98% RH) are available as factory-installed options.

Is the chamber compliant with FDA 21 CFR Part 11 for regulated laboratories?

Yes—the controller includes electronic signature capability, role-based access control, and tamper-proof audit trails required for Part 11 compliance.

Can the chamber be integrated into an existing MES or LIMS infrastructure?

Absolutely—Modbus RTU (RS-485), Ethernet TCP/IP, and HTTP API interfaces enable seamless integration with industrial automation and laboratory informatics systems.

What is the typical lead time for custom-sized chambers?

Standard models ship within 4–6 weeks; fully customized internal dimensions or special environmental profiles require 10–12 weeks from PO confirmation and final drawing sign-off.

Are calibration certificates provided with shipment?

Each unit ships with a factory calibration report (temperature/humidity at three points: low/mid/high range), traceable to CNAS-accredited reference standards per ISO/IEC 17025.