DRETOP THL Series High-Low Temperature Environmental Test Chamber
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Model | THL Series |
| Temperature Range | -70 °C to +150 °C |
| Refrigeration Method | Hermetic Compressor Cooling |
| Temperature Fluctuation | ±0.5 °C |
| Temperature Uniformity | ≤2 °C |
| Temperature Deviation | ±2 °C |
| Heating Rate | ≤50 min (from -20 °C to +150 °C) |
| Cooling Rate | ≤45 min (from +20 °C to -20 °C) |
| Internal Chamber Dimensions | 500×400×500 mm to 1000×1000×1000 mm |
| Compliance | Designed for ASTM D3574, ISO 16750-4, IEC 60068-2-1, IEC 60068-2-2, MIL-STD-810H environmental stress screening protocols |
Overview
The DRETOP THL Series High-Low Temperature Environmental Test Chamber is an engineered thermal stress simulation system designed to replicate extreme ambient temperature conditions for reliability validation of industrial components and finished products. Operating on a dual-stage forced-air convection principle, the chamber utilizes precision-controlled resistive heating elements and a cascade or single-stage hermetic compressor refrigeration circuit—depending on model configuration—to achieve stable, repeatable thermal profiles across wide operating ranges. The THL Series supports both static temperature exposure and dynamic thermal cycling (e.g., ramp-hold-soak sequences), enabling compliance testing per internationally recognized environmental stress standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), ISO 16750-4 (road vehicles), and ASTM D3574 (flexible cellular materials). Its architecture prioritizes thermal stability, operational safety, and long-term calibration integrity—making it suitable for use in QC laboratories, R&D centers, and production line qualification environments under GLP, GMP, and ISO/IEC 17025-accredited workflows.
Key Features
- Full-color 7-inch capacitive touchscreen controller with multilingual UI (English/Chinese), hierarchical password protection (administrator/operator/user levels), and up to 1000 programmable test cycles—each supporting 100 segments with independent ramp rate, soak time, and setpoint control;
- Dual-layer tempered glass observation window with integrated anti-frost heater and LED interior lighting, minimizing condensation and ensuring unobstructed visual monitoring without thermal leakage;
- Optimized air circulation system featuring high-efficiency centrifugal fans and aerodynamically tuned ductwork to maintain ≤2 °C temperature uniformity (per IEC 60068-3-5) and rapid recovery (<3 min) after door opening;
- Modular thermal management: independent heating, cooling, and humidity control circuits (where applicable) reduce cross-interference, improve energy efficiency, and extend component service life;
- Robust mechanical construction with stainless steel 304 inner chamber, silicone rubber door gasket rated for -70 °C to +150 °C, and heavy-duty casters with locking mechanism for secure repositioning;
- Comprehensive safety architecture including over-temperature cut-off, compressor/fan overload protection,漏电保护 (RCD), and automatic power recovery after grid interruption.
Sample Compatibility & Compliance
The THL Series accommodates diverse sample geometries via standardized internal dimensions (50 L to 1000 L volume options) and two adjustable stainless steel shelves per unit. Optional 50 mm diameter cable/port access ports (standard on all models) support powered, signal-transmitted, or pneumatic testing configurations—enabling real-time electrical parameter monitoring during thermal stress. All units are factory-calibrated and traceable to NIST-certified references. Design and performance align with requirements for environmental stress screening (ESS) per MIL-STD-810H Method 502.7 (low temperature) and Method 501.7 (high temperature), as well as automotive qualification per ISO 16750-4 and electronic component testing per JEDEC JESD22-A104. Explosion-proof variants (THL-Ex series) meet ATEX Directive 2014/34/EU Category 2G and IECEx certification for hazardous area operation.
Software & Data Management
Embedded firmware supports full data logging at user-defined intervals (1 s to 60 min resolution), storing temperature readings, alarm events, program status, and power-on duration. Export formats include CSV and Excel-compatible .xlsx files for post-test analysis. Optional PC-based DRETOP LabControl Suite enables remote supervision, multi-chamber synchronization, automated report generation (PDF/HTML), and audit-trail-enabled user activity logs compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, data immutability, and change history tracking. All recorded data retain timestamping with UTC synchronization and optional GPS-derived location stamping for field-deployed units.
Applications
- Electronics: Thermal cycling of PCBs, semiconductors, connectors, and battery modules to assess solder joint fatigue, delamination, and CTE mismatch;
- Automotive: Validation of ECUs, sensors, lighting assemblies, and infotainment systems under climatic extremes per LV-124 and GMW15002;
- Aerospace: Component-level qualification of avionics enclosures, actuators, and composite layups per RTCA DO-160 Section 4 and SAE ARP4754A;
- Materials Science: Accelerated aging studies of elastomers, adhesives, coatings, and thermoplastics per ASTM D790, ISO 527, and ISO 11357;
- Academic Research: Controlled environment experimentation in polymer physics, phase transition analysis, and low-temperature material behavior;
- Medical Devices: Shelf-life prediction and sterilization process validation for implantables and diagnostic hardware per ISO 14971 and ISO 10993-12.
FAQ
What temperature ranges are available across THL sub-series?
The THL-A/B series covers -20 °C to +120 °C and -40 °C to +120 °C respectively; THL-C/D extends to -60 °C and -70 °C minimum; THL-H variants support up to +150 °C upper limit with corresponding low-end ranges.
Is remote monitoring supported?
Yes—via Ethernet or optional Wi-Fi module, enabling real-time parameter viewing, alarm notification via email/SMS, and secure web-based interface access through TLS 1.2 encrypted connection.
Can the chamber be integrated into an existing MES or LIMS platform?
Standard Modbus TCP and optional OPC UA protocol support allow seamless integration with manufacturing execution systems and laboratory information management systems for automated test record linkage and digital twin synchronization.
What maintenance intervals are recommended?
Compressor oil and refrigerant checks every 24 months; air filter replacement every 6 months; annual verification of temperature sensor accuracy and door seal integrity per ISO/IEC 17025 internal audit checklist.
Are custom chamber modifications available?
Yes—DRETOP offers OEM engineering services including non-standard port layouts, reinforced shelving, inert gas purge capability (N₂/Ar), and bespoke software logic for specialized test protocols.
