OK-TH-80 Programmable Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH-80 Programmable Temperature and Humidity Controlled Environmental Test Chamber is an engineered environmental simulation system designed for precise, repeatable evaluation of product reliability under controlled thermal and hygrothermal stress conditions. Based on the principles of forced-air convection, dual-stage refrigeration, and PID-controlled steam humidification, this chamber delivers stable, traceable climate profiles required for qualification testing in compliance with international standards including MIL-STD-810, IEC 60068-2, and GB/T 2423 series. Its architecture supports both steady-state (constant temperature/humidity) and dynamic (ramp-soak-cycle) test protocols, making it suitable for accelerated life testing, design validation, and pre-compliance screening across electronics, aerospace components, automotive ECUs, polymer packaging, and pharmaceutical primary packaging materials.

Key Features

• Microprocessor-based color touch-screen controller with intuitive GUI, supporting seamless switching between English and Chinese interfaces for global lab operation.
• High-efficiency, fully sealed low-noise dual-stage compressor system utilizing environmentally compliant refrigerants (R404A for high-temp stage; R23 for ultra-low-temp variants), enabling operation down to −70°C.
• Double-gasketed door seal using high-tensile silicone rubber rated for continuous service from −70°C to +150°C, ensuring long-term integrity and minimizing humidity leakage during cyclic tests.
• Interior and exterior chambers fabricated entirely from electropolished SUS#304 stainless steel—resistant to corrosion, non-outgassing, and compatible with cleanroom-grade maintenance protocols.
• Multi-layer insulated observation window with embedded ITO (indium tin oxide) conductive film, providing electrostatic-free visibility and preventing condensation without compromising optical clarity or thermal insulation.
• 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-80 accommodates a wide range of sample geometries via its standardized internal volume (40 × 50 × 40 cm) and optional custom configurations. A single 50 mm diameter through-port on the left wall enables external cabling for powered device-under-test (DUT) monitoring, while two adjustable SUS#304 shelves support load distribution up to 30 kg per shelf. The chamber meets structural and performance requirements outlined in GJB 150.3–1986 (high-temperature), GJB 150.4–1986 (low-temperature), IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (steady-state damp heat), and IEC 60068-2-30 (cyclic damp heat). It supports full audit trails for GLP/GMP-aligned laboratories when paired with validated data logging software.

Software & Data Management

The embedded controller records all operational parameters—including chamber setpoints, actual readings, ramp rates, soak durations, and alarm events—at user-defined intervals (1 s to 60 min resolution). Data export is supported via USB flash drive in CSV format for post-processing in MATLAB, Excel, or LIMS platforms. Optional Ethernet or RS-485 interface modules enable remote monitoring and integration into centralized test management systems. All firmware updates are digitally signed and version-tracked; configuration files are password-protected and support role-based access control (operator, engineer, administrator). For regulated environments, optional 21 CFR Part 11-compliant software packages provide electronic signatures, audit trail generation, and secure user authentication.

Applications

• Electrical and electronic component validation: solder joint fatigue analysis, capacitor derating studies, PCB delamination assessment under thermal cycling with humidity bias.
• Aerospace hardware qualification: avionics enclosure sealing verification, composite material moisture absorption kinetics, and connector contact resistance stability testing.
• Automotive ECU environmental endurance: functional safety testing per ISO 16750-4, including combined temperature-humidity-vibration profiles.
• Pharmaceutical packaging integrity: blister pack permeability evaluation under accelerated aging conditions per ICH Q1A(R2).
• Polymer and coating durability: UV-cured resin crosslinking stability, paint adhesion loss quantification, and elastomer compression set measurement after humid heat exposure.

FAQ

What temperature and humidity ranges are standard on the OK-TH-80?

Standard configurations offer 0–150°C / 20–98% RH. Extended low-temperature variants (−20°C, −40°C, and −70°C) are available as factory-configured options. Humidity range can be expanded to 5–98% RH upon request.
Is the chamber suitable for continuous operation in a Class 10,000 cleanroom environment?

Yes—the SUS#304 construction, zero-oil compressor design, and absence of internal lubricants or volatile organic coatings meet ISO 14644-1 particulate cleanliness requirements when operated with HEPA-filtered air intake.
Can the controller store multiple test programs with nested cycles?

Yes—the controller supports up to 100 user-defined programs, each containing up to 99 segments (ramp/soak/humidity modulation), with unlimited loop nesting and conditional branching based on time or sensor thresholds.
Does the system include calibration certificates traceable to NIST or equivalent national metrology institutes?

Factory calibration reports (temperature and humidity) are provided with each unit, referencing traceable standards. On-site ISO/IEC 17025-accredited calibration services are available as an add-on option.
What electrical infrastructure is required for installation?

AC 380 V ±5%, 50 Hz ±0.5 Hz, 3-phase 5-wire supply with dedicated circuit breaker (min. 32 A), proper grounding, and isolation transformer recommended for sensitive DUTs.