English Product Name

Overview

The OK-TH Series Compact Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of electronic components, polymer materials, pharmaceutical packaging, automotive parts, and precision optical assemblies. Designed around a robust dual-stage refrigeration architecture and high-fidelity PID-controlled humidification system, it delivers stable, repeatable thermal-hygrometric profiles across a wide operational envelope—from extreme sub-zero cold to sustained high-temperature dry conditions. Its core measurement principle relies on real-time feedback from calibrated platinum resistance thermometers (PT100) and capacitive humidity sensors, integrated into a closed-loop control system that maintains chamber setpoints within tightly defined uniformity and fluctuation tolerances per IEC 60068-3-5. The chamber’s compact footprint and modular internal volume options (80 L to 1000 L) make it suitable for space-constrained laboratories while retaining full compliance with international qualification test standards used in aerospace, defense, and regulated manufacturing environments.

Key Features

• Modular chamber configurations: Six standard models (OK-TH-80 to OK-TH-1000) with customizable internal dimensions—enabling precise fit-for-purpose validation of small-to-medium-sized samples.
• Dual-stage refrigeration system utilizing environmentally compliant refrigerants (R404A for primary stage, R23 for ultra-low subcooling), ensuring reliable operation down to −70°C without cryogenic consumables.
• High-resolution digital control: 0.1°C / 0.1% RH resolution with programmable ramp-soak cycles, alarm logging, and real-time deviation monitoring via touchscreen HMI.
• SUS#304 stainless steel construction throughout—interior chamber, door gasket, shelving, and ductwork—ensuring long-term corrosion resistance and cleanroom-compatible surface integrity.
• Integrated mechanical features: Two-tier adjustable stainless steel shelves, single 50 mm diameter cable/port access hole, four locking casters with leveling feet, and rear-mounted power inlet for standardized lab integration.
• Comprehensive safety architecture: Over-temperature cut-off, compressor high-pressure protection, humidity sensor self-diagnostic, and door-open interlock preventing unintended thermal/humidity excursions.

Sample Compatibility & Compliance

The OK-TH chamber accommodates diverse sample geometries—including PCB assemblies, battery cells, medical device housings, adhesive tapes, and coated substrates—within its fully ventilated, laminar airflow design. Internal air circulation employs backward-curved centrifugal fans with variable-speed drive, minimizing turbulence-induced thermal gradients and ensuring ±0.5°C temperature uniformity across the working volume. All models are certified to meet the environmental test requirements of MIL-STD-810G Method 502.5 (Low Temperature), Method 501.5 (High Temperature), and Method 507.5 (Humidity), as well as IEC 60068-2 series standards for both steady-state and cyclic damp heat exposure. For regulated industries, the controller supports optional audit-trail functionality and user-access-level configuration (operator/engineer/administrator), aligning with GLP and GMP documentation expectations. Calibration certificates traceable to NIST or equivalent national metrology institutes are available upon request.

Software & Data Management

The embedded controller provides local data logging at user-defined intervals (1–600 seconds), storing up to 100 test programs and 30 days of continuous parameter history (temperature, humidity, alarms, setpoint changes). Optional RS485/Modbus RTU or Ethernet TCP/IP connectivity enables remote monitoring and integration into centralized laboratory information management systems (LIMS) or SCADA platforms. For advanced analysis, OK Instrumentation offers companion PC software (OK-EnviroLog™) supporting CSV export, trend charting, statistical process reporting (min/max/mean/stdev), and automated PDF report generation—including test ID, operator signature, calibration status, and pass/fail annotations against predefined acceptance criteria. All data files are timestamped and digitally signed to satisfy FDA 21 CFR Part 11 requirements when configured with role-based authentication and electronic signature modules.

Applications

This chamber serves critical roles across multiple validation workflows: thermal cycling reliability assessment of solder joints per IPC-9701; shelf-life stability testing of sterile barrier systems under ISO 11607-1; preconditioning of lithium-ion cells prior to electrical characterization per UN 38.3; verification of moisture barrier performance in flexible electronics encapsulation; and accelerated aging of elastomeric seals under combined thermal-hygrometric stress. It is routinely deployed in QC labs for incoming material inspection (e.g., conformal coating adhesion after humidity soak), R&D labs for formulation optimization (e.g., polymer crystallinity shift under controlled RH), and certification labs conducting third-party compliance testing for CE, UKCA, and CCC marking submissions.

FAQ

What is the standard warranty period for the OK-TH chamber?

All units include a 24-month limited warranty covering parts and labor for defects in materials and workmanship under normal use conditions.

Can the chamber be validated for IQ/OQ/PQ protocols?

Yes—OK Instrumentation provides optional qualification packages including installation qualification (IQ) checklists, operational qualification (OQ) test scripts, and protocol-ready calibration templates aligned with ASTM E2582 and ISO/IEC 17025 requirements.

Is remote firmware update supported?

Firmware updates are performed via USB flash drive using secured, version-signed binaries—no internet-connected update mechanism is implemented to preserve system integrity in secure lab networks.

Are custom internal configurations (e.g., additional ports, non-standard shelves) available?

Yes—custom engineering services include modified internal layouts, reinforced load-bearing shelves, inert gas purge interfaces, and specialized sensor mounting brackets, subject to minimum order quantity and lead time confirmation.

Does the controller support multi-step profile programming?

Yes—the built-in program editor supports up to 99 segments per cycle, with independent ramp rate, soak duration, and humidity/temperature setpoint definitions, including conditional branching based on elapsed time or sensor thresholds.