OK-TH-120 Walk-in Temperature & Humidity Environmental Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | OK-TH-120 |
| Price | ¥99,000 CNY |
| Internal Dimensions (D×W×H) | 2000 × 2000 × 2000 mm |
| Temperature Range Options | A: 0°C / B: −20°C / C: −40°C / D: −60°C / E: −70°C |
| Temperature Uniformity | ±3°C |
| Temperature Control Accuracy | ±1°C |
| Heating Rate | 1.0–4.0°C/min |
Overview
The OK-TH-120 Walk-in Temperature & Humidity Environmental Test Chamber is an industrial-grade, large-volume climate simulation system engineered for system-level environmental validation of high-value, physically expansive test articles. Designed according to the fundamental principles of forced-convection thermodynamics and psychrometric control, it maintains precise, stable, and spatially uniform temperature and relative humidity conditions across its 8 m³ internal workspace (2000 × 2000 × 2000 mm). Unlike benchtop or upright environmental chambers, the OK-TH-120 functions as a fully accessible environmental room—equipped with reinforced structural framing, a personnel-rated insulated access door, and integrated safety interlocks—enabling direct operator entry for sample installation, sensor placement, real-time instrumentation connection, and in-situ monitoring during extended test cycles. Its architecture supports continuous operation under extreme thermal stress profiles, making it suitable for reliability qualification, accelerated life testing, and environmental stress screening (ESS) of whole assemblies such as electric vehicle powertrains, aerospace avionics racks, utility-scale battery energy storage systems (BESS), and telecom infrastructure cabinets.
Key Features
- Modular high-density polyurethane (PU)-core insulated panel construction with galvanized steel or stainless-steel cladding, ensuring thermal resistance ≥ 0.85 W/m²·K and structural integrity for long-term cycling.
- Dual-stage cascade refrigeration system optimized for low-temperature performance down to −70°C, incorporating separate high- and low-stage compressors, oil management, and enhanced heat exchange surfaces.
- High-capacity axial and centrifugal air circulation system with multi-directional ducting and adjustable vanes, delivering ≥ 3 air changes per minute and achieving ≤ ±3°C temperature uniformity throughout the working volume (per IEC 60068-3-5).
- Integrated steam-based humidification system with PID-controlled water reservoir, stainless-steel evaporator, and condensate management—capable of maintaining RH ranges from 20% to 98% at temperatures ≥ 10°C.
- Programmable PLC-based controller with 10.4″ color touchscreen interface, supporting up to 99 programmable segments, ramp/soak profiles, real-time trend logging, and alarm history with timestamped event records.
- Comprehensive safety architecture including over-temperature cut-off, refrigerant pressure monitoring, door safety interlock, emergency stop circuitry, and optional nitrogen purge capability for inert atmosphere testing.
Sample Compatibility & Compliance
The OK-TH-120 accommodates test specimens with maximum external dimensions up to 1800 × 1800 × 1800 mm, leaving ≥100 mm clearance on all sides for unimpeded airflow. It is routinely deployed in compliance-critical validation workflows aligned with ISO 16750-4 (road vehicles), MIL-STD-810H Method 502.7 (low temperature) and 507.6 (humidity), IEC 62619 (industrial batteries), and UL 1973 (energy storage systems). Optional configurations support GLP/GMP-compliant data integrity requirements—including audit-trail-enabled controllers compliant with FDA 21 CFR Part 11—when paired with validated software packages and calibrated reference sensors traceable to NIST or CNAS standards.
Software & Data Management
The embedded control system provides native Ethernet connectivity (RJ45) and Modbus TCP/IP protocol support for integration into centralized laboratory information management systems (LIMS) or SCADA platforms. Optional OK-EnviroLog™ software enables remote supervision via secure HTTPS interface, synchronized multi-channel data acquisition (up to 16 external thermocouple/hygrometer inputs), automated report generation (PDF/CSV), and deviation alerting with configurable email/SMS notifications. All recorded data—including chamber setpoints, actual values, alarm states, and operational logs—are stored with cryptographic hash verification to ensure non-repudiation and regulatory traceability.
Applications
- Automotive: Whole-vehicle cold-start validation, HVAC performance mapping, battery thermal management system (BTMS) endurance testing, and ADAS sensor environmental robustness assessment.
- Aerospace & Defense: Ground-based thermal vacuum pre-screening of satellite subsystems, environmental qualification of UAV airframes, and avionics rack thermal cycling per DO-160G Section 4.
- Energy Storage: Long-duration cycle testing of 48V–1500V BESS cabinets under combined thermal-humidity stress, including charge/discharge synchronization under controlled ambient conditions.
- Telecommunications: Thermal load simulation for 5G base station cabinets, edge computing nodes, and optical line terminal (OLT) enclosures operating in outdoor-rated environments.
- Industrial Electronics: Burn-in and HALT precursor testing of industrial PLCs, motor drives, and power converters under sustained high-humidity and sub-zero thermal soak conditions.
FAQ
What is the standard lead time for factory acceptance testing (FAT) and commissioning?
Standard FAT includes functional verification of temperature/humidity range, uniformity, stability, and safety interlocks; typical lead time is 6–8 weeks post-order confirmation, subject to site readiness and utility availability.
Can the chamber be configured for rapid temperature transition testing (RTT)?
While the OK-TH-120 is optimized for steady-state and moderate-rate cycling (1.0–4.0°C/min), custom variants with enhanced compressor capacity, liquid nitrogen assist, and upgraded insulation are available for rates up to 10°C/min upon engineering review.
Is on-site installation and validation support included?
Yes—OK Instruments provides turnkey installation, IQ/OQ documentation support, and third-party calibration certification (optional) through authorized regional service partners.
How is humidity control maintained at sub-zero temperatures?
Below 0°C, the chamber operates in dry-freeze mode; humidity control is disabled per IEC 60068-2-30 Annex A to prevent ice accumulation on sensors and ductwork—consistent with industry practice for low-temperature reliability testing.
What electrical supply specifications are required?
Standard configuration requires three-phase 380 VAC ±10%, 50 Hz, with dedicated grounding and minimum 63 A circuit protection; voltage and frequency variants (e.g., 460 V/60 Hz) are available for export markets.
