Other Brands OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise simulation of climatic stress conditions in laboratory and industrial quality assurance environments. Based on forced-air convection and dual-stage refrigeration architecture, the chamber delivers stable, repeatable control across wide thermal and hygrometric ranges—enabling rigorous validation of product reliability under accelerated aging, storage, transportation, and operational scenarios. Its design adheres to fundamental thermodynamic principles governing heat transfer, moisture diffusion, and psychrometric equilibrium, ensuring traceable performance against internationally recognized environmental test standards. Unlike generic climate cabinets, the OK-TH series integrates calibrated sensor feedback loops, PID-controlled heating/cooling modulation, and humidity generation via steam injection or ultrasonic atomization—providing high reproducibility essential for compliance-driven testing workflows.

Key Features

• Configurable temperature range spanning -70 °C to +150 °C, with selectable sub-zero tiers (B: -20 °C, C: -40 °C, D: -70 °C) to accommodate diverse material response profiles.
• Humidity control from 20 %RH to 98 %RH as standard; optional extended range (5–98 %RH) supports ultra-low dew point evaluation for electronics and aerospace components.
• High-fidelity uniformity: ±0.5 °C temperature deviation and ±2.5 %RH spatial variation across working volume—validated per IEC 60068-3-5.
• Dual-stage hermetic refrigeration system utilizing R404A/R23 blended refrigerant ensures rapid thermal ramping (~4.0 °C/min heating, ~1.0 °C/min cooling) while maintaining low acoustic emission (<65 dB(A)).
• SUS#304 stainless steel construction—both interior chamber and outer casing—resists corrosion, facilitates cleaning, and complies with ISO 14644-1 Class 8 cleanroom compatibility requirements.
• Intuitive touchscreen controller with real-time graphing, programmable multi-step profiles, alarm logging, and audit-ready event history.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad spectrum of physical specimens—from printed circuit boards and polymer housings to automotive ECUs, medical device packaging, and pharmaceutical primary containers. Internal dimensions range from 80 L to 1000 L (OK-TH-80 to OK-TH-1000), with customizable configurations including additional ports, reinforced shelves, and inert gas purge options. All models are validated to meet the environmental stress test requirements of MIL-STD-810G (via GJB150.3/4), IEC 60068-2 series (tests A, B, Cab, Db), and corresponding Chinese national standards (GB/T 2423.1–2423.4). The system supports GLP-compliant operation through configurable user access levels, electronic signature capability, and data integrity features aligned with FDA 21 CFR Part 11 expectations when integrated with compliant software platforms.

Software & Data Management

The embedded controller provides native support for test program creation, execution monitoring, and real-time parameter visualization. Logged data—including temperature, humidity, timestamps, alarms, and setpoint deviations—is exportable in CSV format for post-test analysis. Optional PC-based software extends functionality with remote supervision, automated report generation (PDF/Excel), statistical process control (SPC) overlays, and integration into enterprise LIMS or MES systems via Modbus TCP or Ethernet/IP protocols. All data records retain full traceability: operator ID, calibration status of sensors, firmware revision, and environmental condition metadata are embedded within each dataset.

Applications

• Accelerated life testing of consumer electronics under combined thermal-hygrometric stress.
• Validation of seal integrity and moisture barrier performance in sterile medical packaging per ISO 11607.
• Material characterization of elastomers, adhesives, and composites across glass transition and moisture absorption boundaries.
• Pre-conditioning of lithium-ion battery cells prior to electrical cycling per UN 38.3 Section 40.3.
• Environmental stress screening (ESS) of avionics modules to MIL-STD-883 Method 1010.8.
• Stability studies for pharmaceuticals under ICH Q1A(R2) long-term and accelerated storage conditions.

FAQ

What temperature and humidity accuracy can be expected during steady-state operation?
At nominal setpoints (e.g., 25 °C/60 %RH), typical measurement uncertainty is ±0.3 °C and ±2.0 %RH, referenced to NIST-traceable secondary standards.
Is the chamber suitable for testing samples requiring inert atmosphere exposure?
Yes—optional nitrogen purge kits and sealed gas inlet/outlet ports enable controlled atmosphere operation down to <100 ppm O₂.
How is calibration maintained over time?
The system includes built-in sensor self-diagnostics and supports external verification using Class AA platinum resistance thermometers and chilled-mirror hygrometers per ISO/IEC 17025 guidelines.
Can test profiles be exported and shared between multiple chambers?
Yes—profile files (.prf) are platform-agnostic and interoperable across all OK-TH series units with identical firmware versions.
Does the controller support regulatory audit trails?
All configuration changes, manual overrides, and alarm events are timestamped, user-identified, and retained for ≥18 months—meeting minimum ALCOA+ data integrity criteria.