Other Brands OK-TH Series High-Low Temperature & Humidity Environmental Test Chamber
| Brand | Other Brands |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Price | USD 2,650 (FOB) |
| Temperature Range | -70°C to +150°C (selectable configurations A–D) |
| Humidity Range | 20–98% RH (optional 5–98% RH) |
| Temp. Uniformity | ±0.5°C |
| Humidity Uniformity | ±2.5% RH |
| Temp. Stability | ±2.0°C |
| Humidity Stability | +2–3% RH |
| Resolution | 0.1°C / 0.1% RH |
| Ramp Rates | Heating ~4.0°C/min |
| Interior Construction | SUS#304 Stainless Steel |
| Exterior Construction | Powder-coated steel with SUS#304 inner chamber |
| Viewing Window | Multi-layer tempered glass with conductive ITO film |
| Port | One 50 mm diameter cable port (left side) |
| Safety | Dual-stage over-temperature, over-humidity, compressor overload, and phase-failure protection with real-time fault logging |
Overview
The OK-TH Series High-Low Temperature & Humidity Environmental Test Chamber is an engineered climatic simulation system designed for rigorous environmental stress testing in accordance with international standards including IEC 60068-2, MIL-STD-810H, GB/T 2423, and ISO 16750. It operates on a dual-refrigeration cascade system—utilizing R404A for the high-stage and R23 for the low-stage—to achieve stable, reproducible control across extreme thermal gradients from –70°C to +150°C, coupled with precise humidity regulation from 20% to 98% RH. The chamber employs a forced-air convection architecture with symmetrically arranged centrifugal fans and aerodynamically optimized ductwork to ensure uniform thermal and hygroscopic distribution throughout the working volume. Its closed-loop PID control algorithm, implemented via a 7-inch full-color TFT touch controller, enables simultaneous monitoring of temperature, relative humidity, ramp rate, dwell time, and cycle count—all traceable with timestamped data logs compliant with GLP and 21 CFR Part 11 audit requirements.
Key Features
- Microprocessor-based touchscreen controller with intuitive bilingual (English/Chinese) interface and real-time graphical trend display
- Cascade refrigeration system using environmentally compliant refrigerants (R404A/R23), certified per ASHRAE Standard 34 and EU F-Gas Regulation (EU) No 517/2014
- SUS#304 stainless steel interior chamber and insulated double-wall construction with high-density polyurethane foam (≥100 mm thickness, thermal conductivity ≤0.022 W/m·K)
- Multi-layer heated observation window with embedded ITO conductive film to prevent condensation and ensure unobstructed visual monitoring during low-temperature/humidity cycles
- Dual-seal door design featuring high-tensile silicone gasket and secondary magnetic seal for leak rates <1.0×10⁻³ Pa·m³/s under vacuum-assisted integrity verification
- Integrated 50 mm diameter feedthrough port (left-side mounted) compatible with shielded signal cables, thermocouple extensions, or DC power lines up to 300 VAC
- Comprehensive safety suite: independent over-temperature cutoff (mechanical backup), humidity sensor fault detection, phase-loss protection, compressor high-pressure shutdown, and emergency power-off circuit
Sample Compatibility & Compliance
The OK-TH series accommodates a broad spectrum of test specimens—from PCB assemblies and automotive ECUs to polymer composites and pharmaceutical packaging—within standardized internal volumes ranging from 80 L to 1000 L. All models meet structural and operational requirements defined in ASTM D4332 (Conditioning Containers), ISO 4892-2 (Plastics—Laboratory Light Exposure), and JIS Z 8701 (Environmental Testing—General Rules). Humidity generation utilizes stainless steel steam-jacketed humidifiers with deionized water feed and automatic drain management to minimize mineral deposition. Condensate removal is handled via gravity-fed drainage with optional condensate pump integration. Calibration traceability is maintained to NIST-traceable reference standards, with optional factory certification per ISO/IEC 17025.
Software & Data Management
Data acquisition and cycle programming are managed through the embedded controller’s native firmware, supporting up to 99 programmable test profiles with 999 segments per profile—including ramp-soak-cycle sequences, step changes, and logarithmic transitions. Real-time data export is available via USB 2.0 (CSV format) or optional Ethernet/Wi-Fi module (Modbus TCP or HTTP API). The system supports electronic signature-enabled user access levels (Operator, Engineer, Administrator), password-protected parameter editing, and immutable audit trails recording all configuration changes, alarm events, and manual interventions. Optional PC-based software (OK-EnviroLog Pro) provides advanced statistical analysis, SPC charting, deviation reporting, and automated compliance documentation aligned with FDA 21 CFR Part 11 Annex 11 and EU GMP Annex 15 requirements.
Applications
- Accelerated life testing of electronic components under thermal cycling combined with humidity bias (e.g., JEDEC JESD22-A104, A110)
- Evaluation of coating adhesion, blistering, and corrosion resistance per ASTM D714, D1654, and ISO 12944
- Validation of battery thermal runaway behavior under controlled ambient conditions (UN 38.3, IEC 62133)
- Stability assessment of medical devices per ISO 11607-1 and packaging integrity verification under cyclic humidity exposure
- Material property characterization—including dimensional stability, tensile strength retention, and dielectric constant shift—across defined climate zones (IEC 60721-3-4 Class 4K4)
- Automotive component qualification per GMW3172, Ford CETP 00.00-L-467, and VW 80101
FAQ
What temperature and humidity ranges are standard versus optional?
Standard configuration covers –20°C to +150°C and 20–98% RH. Extended low-temperature options (–40°C and –70°C) and expanded humidity range (5–98% RH) are available as factory-installed options requiring additional refrigeration staging and enhanced humidifier calibration.
Is the chamber suitable for continuous operation under GMP/GLP conditions?
Yes—the system supports 24/7 operation with redundant safety interlocks, validated temperature/humidity mapping protocols, and electronic record retention meeting ALCOA+ principles. Optional IQ/OQ documentation packages are available upon request.
Can the controller interface integrate with a central MES or SCADA system?
Yes—via Modbus TCP (standard Ethernet port) or optional OPC UA gateway. Integration includes real-time setpoint readback, alarm status polling, and cycle completion signaling.
What maintenance intervals are recommended for long-term reliability?
Compressor oil and filter replacement every 12 months or 2,000 operating hours; humidity sensor recalibration annually; door gasket inspection quarterly; refrigerant leak check biannually per ISO 5149-2.
Does the unit comply with electromagnetic compatibility (EMC) directives?
Yes—certified to EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) for industrial environments, with CE marking and RoHS 2 compliance documented in the Declaration of Conformity.
