Vertical Temperature and Humidity Controlled Chamber – OK-TH Series

Overview

The OK-TH Series Vertical Temperature and Humidity Controlled Chamber is an engineered environmental simulation system designed for rigorous reliability validation under controlled thermal and hygrothermal stress conditions. Based on the principle of forced-air convection combined with precision vapor compression refrigeration and steam/humidification saturation control, it delivers stable, repeatable, and traceable environmental profiles across a wide operational envelope. This chamber supports both steady-state (constant temperature/humidity) and dynamic (cyclic, ramped, or stepped) test protocols—making it suitable for accelerated life testing, qualification screening, and compliance verification in accordance with international environmental test standards.

Key Features

• Robust stainless steel construction: Fully welded interior and exterior chambers fabricated from SUS#304 stainless steel, ensuring long-term corrosion resistance and cleanroom-compatible surface integrity.
• High-fidelity climate control: Dual-stage hermetic compressors with environmentally approved refrigerants (R404A/R23), coupled with PID-controlled electric heating elements and ultrasonic steam humidifier, enable precise regulation across full operating ranges.
• Intelligent human-machine interface: 7-inch color TFT touchscreen controller with real-time graphical display, programmable multi-segment test profiles, and seamless English/Chinese language switching—designed for intuitive operation and audit-ready parameter logging.
• Optimized thermal and humidity uniformity: Optimized air distribution via centrifugal fan with adjustable baffle system ensures ±0.5 °C temperature uniformity and ±2.5 %RH humidity uniformity within the working volume.
• Enhanced visibility and accessibility: Triple-layer tempered observation window with integrated ITO conductive film prevents condensation and enables unobstructed visual monitoring without compromising chamber integrity.
• Integrated safety architecture: Comprehensive protection suite includes over-temperature cutoff, over-humidity shutdown, compressor high-pressure lockout, door-open alarm, and real-time fault diagnostics with on-screen status reporting and automatic mains disconnection.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad spectrum of physical samples—from PCB assemblies and automotive ECUs to polymer components, aerospace fasteners, and pharmaceutical packaging—without requiring internal modification. Its standardized internal dimensions (ranging from 80 L to 1000 L working volume) support standard test fixtures, load racks, and third-party sensor integration. The system complies with key environmental test standards including MIL-STD-810G Method 502.5 (Temperature), Method 507.5 (Humidity), 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 meets GB/T 2423.1–2001, GB/T 2423.2–2001, and GB/T 2423.4–1993 requirements for domestic regulatory alignment. While not pre-certified to ISO/IEC 17025 or GLP, its data logging capabilities and controller audit trail functionality support laboratory accreditation readiness when implemented within documented SOPs.

Software & Data Management

The embedded controller provides local data storage (≥30 days of 1-second interval logging) with USB export capability for CSV-formatted time-series records. Optional PC-based software (OK-Link Suite) enables remote monitoring, multi-chamber synchronization, automated report generation (PDF/Excel), and configurable alarm notifications via email or SMS. All logged parameters—including chamber setpoint, actual temperature/humidity, ramp rates, cycle counters, and fault events—are timestamped with millisecond resolution. The system supports 21 CFR Part 11-compliant user access control (role-based login), electronic signatures, and immutable audit trails when deployed with validated software configuration and network authentication infrastructure.

Applications

This chamber serves as a core platform for environmental stress screening in quality assurance, R&D, and production release workflows. Typical use cases include: thermal cycling of semiconductor packages per JEDEC JESD22-A104; humidity soak testing of conformal-coated electronics; validation of moisture barrier performance in medical device packaging; accelerated aging of elastomeric seals under combined thermal-hygric load; and qualification of battery modules per UN 38.3 thermal abuse protocols. Its vertical footprint optimizes floor space utilization in constrained lab environments while maintaining accessibility for large-format test specimens.

FAQ

What temperature and humidity ranges are available across the OK-TH series?
Standard configurations offer four temperature variants: 0–150 °C (A), −20–150 °C (B), −40–150 °C (C), and −70–150 °C (D); humidity range is 20–98 %RH as standard, with optional extensions down to 5 %RH.
Can the chamber be integrated into an existing test automation framework?
Yes—RS485 Modbus RTU and optional Ethernet TCP/IP interfaces support integration with SCADA systems, MES platforms, and custom LabVIEW or Python-based control environments.
Is calibration documentation provided with shipment?
Each unit ships with a factory-assembled calibration certificate (traceable to NIST or equivalent national metrology institute) covering temperature and humidity sensors at three points across the operational range.
What maintenance intervals are recommended for long-term reliability?
Compressor oil and refrigerant levels should be verified annually; condensate drain lines require quarterly inspection; stainless steel surfaces should be cleaned with non-chlorinated solvents every six months.
Does the system support custom test profile programming?
Yes—the controller supports up to 100 programmable segments per profile, with independent ramp rate, dwell time, and setpoint definition for both temperature and humidity axes.