OK Instruments OK-TH-100.1 Temperature and Humidity Controlled Chamber

Overview

The OK Instruments OK-TH-100.1 Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise, repeatable simulation of climatic stress conditions in laboratory and quality assurance environments. Based on the principle of forced-air convection combined with dual-stage refrigeration and PID-controlled steam humidification, the chamber delivers stable thermal and hygrometric profiles across a wide operational envelope. It is intended for evaluating material and component behavior under controlled temperature and relative humidity (RH) exposure—critical for reliability validation, accelerated aging studies, and compliance verification per international environmental testing standards.

Key Features

• Microprocessor-based color touchscreen controller with intuitive bilingual (English/Chinese) interface and real-time graphical display of setpoints, actual values, and trend curves.
• Benchtop configuration with compact footprint (500 × 500 × 400 mm internal volume), optimized for space-constrained labs while maintaining robust performance.
• Full-sealed, low-noise, dual-stage air-cooled refrigeration system using environmentally compliant R404A/R23 mixed refrigerant, enabling rapid thermal response and extended low-temperature capability down to –40 °C.
• Double-layer high-tensile silicone rubber door gasket ensures long-term sealing integrity; multi-layer laminated tempered glass observation window with embedded conductive film prevents condensation and enables unobstructed visual monitoring.
• Interior and exterior chambers constructed from SUS#304 stainless steel—corrosion-resistant, non-outgassing, and compatible with cleanroom and GLP-compliant workflows.
• Standard 50 mm diameter cable port on left side wall, pre-installed with removable blanking plug; includes two adjustable stainless steel shelves and four leveling casters with locking mechanism.
• Comprehensive safety architecture: over-temperature, over-humidity, compressor overload, phase failure, and sensor fault detection—all triggering automatic power cutoff and on-screen alarm with event logging.

Sample Compatibility & Compliance

The OK-TH-100.1 accommodates a broad range of sample types—including electronic assemblies, polymer specimens, coated substrates, pharmaceutical packaging, and optical components—without requiring modifications to the chamber structure. Its thermal and humidity uniformity specifications (±2 °C / ±3 %RH) meet minimum requirements for routine environmental qualification per IEC 60068-2 series and GB/T 2423 national standards. The unit is configured to support testing protocols defined in:

• GJB 150.3–1986 (High-Temperature Environmental Testing)
• GJB 150.4–1986 (Low-Temperature Environmental Testing)
• IEC 60068-2-1 (Test A: Cold)
• IEC 60068-2-2 (Test B: Dry Heat)
• IEC 60068-2-78 (Test Cab: Damp Heat, Steady State)
• IEC 60068-2-30 (Test Db: Damp Heat, Cycling)

While not certified to ISO/IEC 17025 or accredited for regulatory submission, the chamber’s control stability, traceable calibration points, and audit-ready operation logs align with internal QA/QC, supplier qualification, and pre-compliance screening workflows in electronics, automotive, and industrial R&D settings.

Software & Data Management

The integrated touch controller supports data logging at user-defined intervals (1–600 seconds), storing up to 100 test programs with up to 99 segments each. Logged data—including time-stamped temperature, RH, and alarm events—is exportable via USB to CSV format for post-processing in Excel or statistical analysis software. The system records timestamped operational events (e.g., door opening, program start/stop, fault triggers) with retention for ≥30 days. While native remote monitoring or Ethernet connectivity is not included, optional RS485/Modbus RTU output allows integration into centralized facility SCADA systems. All parameter changes and alarm acknowledgments are time-stamped and retained in non-volatile memory, supporting basic GLP-aligned recordkeeping requirements.

Applications

• Electrical and electronic component validation under thermal cycling and humidity bias stress (e.g., solder joint integrity, conformal coating adhesion, capacitor leakage current).
• Automotive interior material testing for fogging, warping, and VOC emission under elevated temperature/humidity (per ISO 6452 or SAE J1756).
• Coating and paint durability assessment—including blistering, chalking, and gloss loss—per ASTM D2247 and ISO 4624.
• Pharmaceutical packaging permeability screening (e.g., blister foil, HDPE bottles) under accelerated moisture ingress conditions.
• Calibration lab environmental stabilization for precision weighing, dimensional metrology, and optical alignment procedures.
• Academic research in polymer science, corrosion kinetics, and hygroscopic material behavior.

FAQ

What is the standard power requirement for the OK-TH-100.1?
The chamber operates on three-phase AC 380 V ±5 %, 50 Hz ±0.5 Hz, with a 2.5-meter power cord supplied as standard.
Can the chamber be customized for wider temperature or humidity ranges?
Yes—OK Instruments offers optional configurations including extended low-temperature variants (–70 °C), ultra-low humidity (<10 %RH), and larger internal volumes (up to 1000 L); consult engineering support for feasibility and lead time.
Is the controller compatible with external data acquisition systems?
Yes—the built-in RS485 port supports Modbus RTU protocol for read-only access to real-time sensor values and status flags; custom integration requires third-party driver development.
Does the unit include calibration documentation?
A factory calibration report (covering temperature and humidity sensors at three points within the operating range) is provided with shipment; periodic recalibration is recommended annually per ISO/IEC 17025 guidelines.
What maintenance is required to ensure long-term stability?
Routine tasks include quarterly cleaning of condenser coils and air intake filters, biannual inspection of door gaskets for compression integrity, and annual verification of refrigerant charge and humidifier tank cleanliness.