OKO OK-TH-225 Temperature and Humidity Controlled Chamber

Overview

The OKO OK-TH-225 Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise, repeatable simulation of thermal and hygrometric conditions in laboratory and quality assurance settings. It operates on a closed-loop control architecture grounded in PID-based feedback regulation, integrating independent thermoelectric heating, air-cooled mechanical refrigeration, steam-based humidification, and condensative dehumidification subsystems. This architecture enables stable maintenance of setpoint conditions across its full operational envelope—from sub-zero freezing to high-temperature bake-out—while supporting both static and dynamic profile testing per international standards including IEC 60068-2, GB/T 2423, and ISO 16750-4. The chamber’s benchtop form factor delivers industrial-grade performance without requiring floor-mounted infrastructure, making it suitable for QC labs, R&D facilities, and third-party testing centers where space efficiency and operational flexibility are critical.

Key Features

• Robust air-cooled dual-stage refrigeration system with optimized heat exchange design, enabling reliable operation down to −50 °C without external water cooling or cryogenic support.
• Steam-generation humidification module using distilled or deionized water, delivering rapid humidity response and minimizing mineral deposition risk—critical for long-term calibration stability.
• High-resolution platinum resistance temperature sensors (PT100) and capacitive relative humidity transducers mounted at multiple spatial locations ensure representative measurement and uniformity validation.
• Intuitive 7-inch color touchscreen interface with embedded data logging (up to 10,000 data points), real-time trend visualization, and password-protected parameter locking for GLP-compliant operation.
• Benchtop footprint (W 600 × D 750 × H 500 mm internal volume) accommodates medium-sized electronic assemblies, automotive components, polymer specimens, and pharmaceutical packaging units without compromising airflow integrity.
• Compliance-ready configuration supports audit trails, user access levels, and exportable CSV reports—facilitating alignment with FDA 21 CFR Part 11 and ISO/IEC 17025 documentation requirements.

Sample Compatibility & Compliance

The OK-TH-225 accommodates non-hazardous solid and packaged samples up to 30 kg total load, provided they do not obstruct rear-mounted air circulation ducts or exceed the chamber’s maximum power dissipation rating (≤150 W). Samples must be placed on perforated stainless-steel shelves to maintain laminar airflow and minimize localized thermal gradients. The unit meets structural and safety provisions outlined in IEC 61000-6-2 (EMC immunity) and IEC 61010-1 (electrical safety for lab equipment). While not intrinsically rated for explosive atmospheres, optional modifications—including explosion-proof lighting and purge-compatible gasketing—are available upon request for specialized applications. All factory calibration certificates reference NIST-traceable standards, and chamber uniformity verification follows ASTM E744 procedures.

Software & Data Management

The embedded controller firmware includes built-in profile programming (up to 99 segments per cycle), ramp/soak logic, and event-triggered alarms (e.g., door-open detection, sensor fault, humidity saturation). Optional PC-based OKO-EnviroLink software extends functionality with remote monitoring via Ethernet/Wi-Fi, automated report generation (PDF/Excel), and integration into LIMS environments through Modbus TCP or OPC UA protocols. Audit trail records capture timestamped operator actions, setpoint changes, alarm events, and calibration history—supporting traceability requirements under GMP, ISO 9001, and CNAS-accredited testing workflows. Data encryption (AES-128) and role-based authentication ensure secure handling of sensitive test records.

Applications

• Electronics Reliability Testing: Thermal cycling (−40 °C ↔ +85 °C), damp heat (85 °C / 85 % RH), and storage stability assessment per JEDEC JESD22-A104 and A110.
• Automotive Component Validation: Environmental stress screening of ECUs, connectors, battery modules, and interior trim materials per ISO 16750-4 and SAE J2334.
• Materials Aging Studies: Accelerated degradation analysis of elastomers, adhesives, coatings, and composites under controlled humidity and temperature gradients.
• Pharmaceutical Stability Testing: ICH Q1A(R3)-aligned long-term and accelerated stability studies for drug substances and primary packaging systems.
• Academic & Metrological Research: Reference environment generation for sensor calibration, material property benchmarking, and climate model validation experiments.

FAQ

What type of water must be used for humidification?
Distilled or deionized water is mandatory to prevent scale buildup in the steam generator and ensure consistent humidity output over time.
Can the chamber perform rapid temperature transitions?
The OK-TH-225 supports linear heating rates of 1.0–3.0 °C/min; for faster thermal shock profiles (>5 °C/min), a dedicated thermal shock chamber is recommended.
Is remote monitoring supported out of the box?
Yes—the standard controller includes Ethernet connectivity and Modbus TCP support; OKO-EnviroLink software provides full GUI-based remote supervision and data export.
How often should preventive maintenance be performed?
We recommend quarterly inspection of condenser coils, biannual cleaning of the humidifier tank and drain lines, and annual verification of sensor accuracy using certified reference sources.
Does the unit comply with FDA 21 CFR Part 11?
The system supports electronic signatures, audit trails, and data integrity controls required by Part 11 when configured with OKO-EnviroLink and validated operating procedures.