English Product Name

Overview

The OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber is a precision-engineered climatic simulation system designed for rigorous environmental stress testing of electronic components, automotive modules, aerospace hardware, polymer materials, and consumer appliances. Operating on the principle of forced-air convection combined with dual-stage refrigeration and PID-controlled steam humidification, it delivers stable, repeatable thermal and hygrothermal profiles across defined operational envelopes. Its architecture conforms to the fundamental thermodynamic requirements of accelerated aging, qualification, and reliability validation—enabling users to replicate real-world ambient exposure conditions such as tropical humidity, arctic cold, desert dryness, or cyclic condensation environments. The chamber supports both steady-state and programmable ramp-and-soak profiles, making it suitable for compliance-driven testing per MIL-STD-810, IEC 60068-2, and GB/T 2423 standards.

Key Features

• Full-color 7-inch LCD touchscreen controller with intuitive graphical interface and bilingual (English/Chinese) language support for global laboratory operation.
• Dual-stage hermetic refrigeration system using environmentally compliant refrigerants R404A (low-temp stage) and R23 (ultra-low-temp cascade stage), engineered for stable sub-zero performance down to –70 °C.
• Internal and external chambers constructed entirely from electropolished SUS#304 stainless steel—resistant to corrosion, oxidation, and chemical exposure during long-term humidity cycling.
• Multi-layer observation window with integrated conductive film heating to prevent fogging and ensure unobstructed visual monitoring under high-humidity conditions.
• Single 50 mm diameter access port located on the left side wall, sealed with silicone gasket and compatible with shielded signal cables, thermocouple feeds, or DC power lines.
• Comprehensive safety architecture including over-temperature cutoff, compressor high-pressure shutdown, humidity sensor failure detection, and real-time fault logging with audible/visual alerts.
• Thermal insulation using high-density polyurethane foam (≥100 mm thickness) with vacuum-sealed joints to minimize thermal bridging and energy loss.

Sample Compatibility & Compliance

The OK-TH series accommodates test specimens up to 1 m³ in volume (OK-TH-1000 model), supporting standard-sized PCB assemblies, battery packs, LED lighting modules, medical device enclosures, and small mechanical subassemblies. Its uniformity specifications (±0.5 °C temperature, ±2.5 %RH humidity) meet the spatial homogeneity criteria required by ISO 17025-accredited laboratories for calibration traceability. The system is pre-configured to execute standardized test methods including 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 also satisfies military-grade environmental screening per GJB 150.3–1986 and GJB 150.4–1986, with full documentation support for GLP/GMP audit trails when paired with optional data logging firmware.

Software & Data Management

The embedded controller includes built-in data logging at user-selectable intervals (1–600 seconds), storing up to 100 test programs and 10,000 hours of timestamped temperature/humidity records internally. Optional USB export enables CSV-formatted data transfer for post-processing in MATLAB, Excel, or LIMS platforms. For networked environments, RS485 Modbus RTU or Ethernet TCP/IP communication modules are available (model-dependent), enabling integration into centralized facility monitoring systems. All logged data include operator ID, program name, start/stop timestamps, and deviation flags—supporting FDA 21 CFR Part 11 compliance when used with validated electronic signature workflows and audit trail configuration.

Applications

• Electronics reliability validation: solder joint fatigue assessment under thermal cycling, conformal coating adhesion testing under humidity soak.
• Automotive component qualification: ECU thermal shock resistance, connector corrosion evaluation under high-RH storage.
• Polymer and composite aging: dimensional stability measurement of thermoplastics, hydrolysis rate analysis of polyurethanes.
• Pharmaceutical packaging integrity: moisture vapor transmission rate (MVTR) correlation studies under controlled RH gradients.
• Research-grade material science: phase transition mapping of shape-memory alloys, crystallinity evolution in biodegradable films.
• Quality control in manufacturing: incoming inspection of sensors, capacitors, and optoelectronic devices prior to final assembly.

FAQ

What temperature and humidity ranges are standard across all OK-TH models?
All units support 20–98 %RH humidity control; temperature range depends on configuration grade (A: 0–150 °C, B: –20–150 °C, C: –40–150 °C, D: –70–150 °C).
Is the chamber suitable for continuous 24/7 operation in a production QA lab?
Yes—designed for Class II industrial duty cycle with redundant safety interlocks, thermal overload protection, and compressor oil management optimized for extended runtime.
Can I retrofit an existing OK-TH unit with Ethernet connectivity and remote monitoring?
Ethernet communication modules are available as field-installable options for controllers manufactured after Q3 2022; compatibility verification with serial number is required prior to ordering.
Does the system include NIST-traceable calibration certificates?
Factory calibration certificates (temperature/humidity) are provided with each shipment; optional UKAS-accredited calibration with uncertainty budgets is available upon request.
How is humidity generated and controlled within the chamber?
Humidity is produced via electrically heated stainless steel steam generator with PID-modulated water feed; measurement uses capacitive polymer sensors calibrated against chilled-mirror reference.