Constant Temperature and Humidity Chamber

Overview

The Constant Temperature and Humidity Chamber is a precision-engineered environmental test system designed to simulate and maintain stable thermal and hygroscopic conditions for reliability validation, accelerated aging, and qualification testing of materials, electronics, aerospace components, and medical devices. Operating on the principle of forced-air convection with independent PID-controlled heating, refrigeration, and humidification subsystems, it delivers highly reproducible climatic profiles across a wide operational envelope. Unlike transient or cycling chambers, this unit is optimized for long-duration steady-state exposure—enabling compliance verification against military, industrial, and international environmental stress standards including MIL-STD-810, IEC 60068-2, and GB/T 2423 series.

Key Features

• Multi-range temperature capability: Selectable configurations from 0 °C to +150 °C (Model A), down to –70 °C (Model D), accommodating both high-temperature bake-out and deep-cold storage simulation.
• High-fidelity humidity control: Standard 20–98 %RH range; optional extended ranges (5–98 %RH or 10–98 %RH) available for low-humidity desiccation or ultra-high RH validation.
• Precision uniformity and stability: Achieves ±0.5 °C temperature uniformity and ±2.5 %RH humidity uniformity within the working volume; temporal stability maintained at ±2 °C and +2–3 %RH over extended dwell periods.
• Advanced dual-stage refrigeration architecture: Utilizes hermetically sealed, low-noise compressors compliant with EU F-Gas Regulation (R404A primary stage, R23 cascade stage for sub-zero operation), ensuring energy-efficient cooling and minimal maintenance intervals.
• Intuitive 7-inch color touchscreen controller: Supports real-time monitoring, programmable setpoint scheduling, data logging (internal SD card), alarm history, and seamless language switching between English and Chinese—designed for integration into GLP/GMP-compliant lab environments.
• Rugged SUS#304 stainless steel construction: Fully welded interior chamber, insulated double-wall housing, and corrosion-resistant hardware ensure longevity under continuous high-humidity operation and chemical exposure.

Sample Compatibility & Compliance

This chamber accommodates samples up to 1000 L internal volume (OK-TH-1000 model), with customizable internal dimensions and standard features including one 50 mm diameter cable/port access hole, two adjustable stainless steel shelves, four swivel casters with locking brakes, and four leveling feet. All models comply with essential environmental test standards, including but not limited to: GB/T 10586–2014 (Technical Requirements for Humidity Chambers), GB/T 2423.3–2016 (Damp Heat, Steady State), IEC 60068-2-78 (Test Cab), and MIL-STD-810H Method 507.7 (Humidity). The chamber’s design supports traceable calibration per ISO/IEC 17025 requirements and facilitates audit-ready documentation for FDA 21 CFR Part 11–compliant systems when paired with validated software modules.

Software & Data Management

Embedded firmware enables local data recording at user-defined intervals (1 s to 60 min), with timestamped CSV export via USB or SD card. Optional PC-based software provides remote monitoring, multi-chamber fleet management, automated report generation (PDF/Excel), and electronic signature support aligned with 21 CFR Part 11 Annex 11 expectations. Audit trail functionality logs all operator actions—including setpoint changes, door openings, and alarm acknowledgments—with immutable timestamps. Calibration certificates are digitally attachable to test records, supporting full traceability from instrument to final test report.

Applications

• Electronics: PCB moisture sensitivity level (MSL) testing, conformal coating adhesion evaluation, and solder paste shelf-life validation under controlled humidity.
• Aerospace: Composite material outgassing assessment, seal integrity verification, and avionics enclosure environmental screening per DO-160 Section 4.5.
• Pharmaceuticals: Stability chamber qualification (ICH Q1A–Q1E), packaging permeability studies, and excipient hygroscopicity profiling.
• Automotive: ECU functional testing at elevated temperature/humidity, battery module condensation resistance, and polymer aging per ISO 16750-4.
• Academic & Government Labs: Climate simulation for material science research, corrosion rate modeling, and sensor drift characterization under sustained hygrothermal stress.

FAQ

What standards does this chamber meet for humidity testing?
It complies with GB/T 2423.3–2016, IEC 60068-2-78, and MIL-STD-810H Method 507.7 for steady-state damp heat testing, with optional validation kits available for IQ/OQ/PQ protocols.
Can the chamber operate continuously at 98% RH and 85°C?
Yes—models equipped with enhanced condensate management and anti-drip heater systems sustain 98% RH at temperatures up to 85°C without chamber wall condensation or sample wetting.
Is remote monitoring supported out of the box?
Basic Ethernet or RS485 connectivity is standard; full remote supervision requires optional software licensing and IT infrastructure configuration per site-specific cybersecurity policies.
How often does the chamber require recalibration?
Annual calibration is recommended per ISO/IEC 17025 guidelines; interval may be extended to 18 months based on usage intensity and internal verification records.
Are custom internal dimensions or special port configurations available?
Yes—OEM engineering support provides tailored chamber geometry, additional access ports, reinforced shelving, or inert gas purge interfaces upon request.