Other Brands OK-TH Series High-Low Temperature & Humidity Environmental Test Chamber

Overview

The OK-TH Series High-Low Temperature & Humidity Environmental Test Chamber is a precision-engineered climatic simulation system designed for rigorous environmental stress screening of electronic components, aerospace subsystems, automotive ECUs, medical devices, and industrial materials. Operating on the fundamental principles of thermodynamic control and psychrometric regulation, the chamber precisely replicates real-world ambient conditions—including extreme cold, high-temperature exposure, and cyclic or steady-state humidification—to evaluate product reliability, material integrity, and functional stability under accelerated aging protocols. Its dual-stage refrigeration architecture enables stable operation across an extended temperature range from –70 °C to +150 °C, while integrated steam-based humidification and dehumidification circuits maintain controlled moisture levels between 20% and 98% RH—critical for validating compliance with international environmental test standards.

Key Features

• Full-color 7-inch resistive touchscreen controller with intuitive HMI, supporting seamless English/Chinese language switching and real-time graphical trend display of temperature and humidity profiles.
• Dual-stage hermetic refrigeration system using environmentally compliant R404A (low-temp stage) and R23 (ultra-low-temp stage), engineered for low acoustic emission (<65 dB(A)) and long-term operational stability.
• Double-gasketed door seal employing high-tensile silicone rubber gaskets rated for continuous use at –70 °C to +150 °C, ensuring leak-tight chamber integrity and minimizing thermal bridging.
• Interior and exterior construction from electropolished SUS#304 stainless steel—resistant to corrosion, non-outgassing, and compatible with cleanroom and GLP-compliant laboratory environments.
• Multi-layer insulated viewing window with embedded conductive film heating to prevent condensation, enabling unobstructed visual monitoring during high-humidity or sub-zero tests.
• Standard Ø50 mm cable port on the left side, fitted with removable rubber grommet and grounded stainless-steel flange, facilitating safe integration of power, signal, or sensor lines without compromising chamber seal integrity.
• Integrated safety architecture including over-temperature cutoff, compressor high-pressure shutdown, humidity sensor fault detection, and real-time alarm logging with automatic power disconnection upon critical fault recognition.

Sample Compatibility & Compliance

The OK-TH chamber accommodates diverse sample configurations—from PCB assemblies and battery packs to sealed enclosures and polymer specimens—via adjustable stainless-steel shelves and optional custom mounting fixtures. Its uniformity performance (±0.5 °C temperature, ±2.5% RH humidity) and stability metrics meet the spatial and temporal requirements defined in IEC 60068-3-5 for climatic test equipment validation. The system supports full traceability per ISO/IEC 17025:2017 for calibration and verification records. It is validated for execution of MIL-STD-810G Method 502.5 (Low Temperature), Method 501.5 (High Temperature), Method 507.5 (Humidity), and Method 506.5 (Temperature Shock), as well as GB/T 2423.1–2423.4 and GJB 150.3–150.4. Optional IQ/OQ documentation packages are available to support FDA 21 CFR Part 11 and EU Annex 11 validation workflows in regulated manufacturing settings.

Software & Data Management

The embedded controller logs all operational parameters—including setpoints, actual values, ramp rates, alarm events, and system status—at user-defined intervals (1 s to 60 min). Data export is supported via USB 2.0 to CSV or Excel-compatible formats. For networked labs, optional Ethernet connectivity enables remote monitoring and control through a secure web interface compliant with TLS 1.2. Audit trails record operator login/logout, parameter changes, and manual overrides—fully aligned with GLP and GMP data integrity requirements. All firmware updates are digitally signed and version-controlled to ensure reproducibility across qualification batches.

Applications

• Accelerated life testing of lithium-ion batteries under thermal-hygric stress to assess capacity fade, internal resistance shift, and venting thresholds.
• Qualification of avionics enclosures per DO-160 Section 4 (Operating Temperature) and Section 8 (Humidity).
• Material compatibility assessment of adhesives, conformal coatings, and elastomeric seals exposed to combined thermal cycling and condensing humidity.
• Pre-compliance screening of consumer electronics prior to formal IEC 60950-1 or IEC 62368-1 environmental testing.
• Stability studies of pharmaceutical packaging systems under ICH Q1A(R2) long-term and accelerated storage conditions.
• Thermal shock evaluation of MEMS sensors and optoelectronic modules using programmable two-zone ramp profiles.

FAQ

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

The unit includes a 24-month parts-and-labor warranty covering refrigeration system, controller, sensors, and structural components—excluding consumables such as gaskets and humidifier cartridges.
Can the chamber be configured for rapid temperature transitions (e.g., thermal shock)?

Yes—when equipped with optional dual-compartment configuration or external LN2 assist, transition rates up to 15 °C/min can be achieved; standard single-chamber models support programmed ramp profiles within their native heating/cooling capabilities.
Is third-party calibration certification included with delivery?

A NIST-traceable factory calibration report is provided; on-site ISO/IEC 17025-accredited calibration by an accredited body may be arranged separately.
How is humidity controlled below 20% RH?

Sub-20% RH operation requires optional dry-air purge or desiccant-based dehumidification module, as standard steam humidification cannot reliably achieve dew points below 5 °C.
Does the controller support automated test sequencing per IEC 60068-2-30?

Yes—the built-in program editor supports multi-step cyclic profiles with variable dwell times, ramp slopes, and humidity hold phases, fully compliant with IEC 60068-2-30 Annex A for damp heat, cyclic testing.