DRETOP THS Series High-Low Temperature & Humidity Environmental Test Chamber

Overview

The DRETOP THS Series High-Low Temperature & Humidity Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of industrial components and finished products under rigorously controlled thermal and hygrothermal conditions. Based on the principle of forced-air convection with independent dual-loop control of temperature and humidity, the THS chamber replicates real-world climatic exposures—including steady-state high/low temperature, constant humidity, cyclic temperature-humidity profiles, and combined thermal-humidity shock—to evaluate material integrity, dimensional stability, electrical performance, and long-term reliability. Designed in accordance with IEC 60068-2, GB/T 2423, and MIL-STD-810G test methodologies, it serves as a core asset in R&D validation, quality assurance, and pre-compliance screening across electronics, automotive subsystems, LED lighting modules, aerospace components, and medical device packaging.

Key Features

• 7-inch full-color capacitive touchscreen interface supporting dual-language (English/Chinese) operation, hierarchical password-protected access (administrator/operator/user), and up to 1000 stored test programs—each configurable with 100 sequential or looping segments.
• Independent PID-controlled heating (Ni-Cr alloy heaters), cooling (imported hermetic scroll compressor with eco-friendly R404A/R507 refrigerant), and humidification (steam generator + dehumidification via cold trap) systems ensure precise decoupled regulation and minimize cross-interference during dynamic profile execution.
• Optimized air distribution architecture featuring centrifugal circulation fans, aerodynamically shaped ducts, and symmetrical baffle placement achieves ≤1.5 °C temperature uniformity across the working volume and rapid thermal recovery (<3 min) after door opening.
• Dual-layer tempered glass observation window with integrated anti-frost heating element and LED illumination enables unobstructed visual inspection without condensation-induced optical distortion or sample contamination.
• Robust chamber construction: exterior electrostatically sprayed steel housing; interior 304 stainless steel chamber with radius-rounded corners, removable load-bearing shelves (50 kg capacity per shelf), and silicone rubber door gaskets maintaining seal integrity from –70 °C to +150 °C.
• Comprehensive safety architecture includes over-temperature cutoff, compressor/fan overload protection, earth-leakage circuit interruption, voltage fluctuation compensation, and automatic power-resume functionality following grid interruption.

Sample Compatibility & Compliance

The THS chamber accommodates a broad spectrum of test specimens—from PCB assemblies and sensor housings to automotive ECUs and polymer enclosures—via customizable internal dimensions and standard 50 mm diameter test ports (optional sealed feedthroughs for power, signal, or pneumatic lines). Its operational envelope (–70 °C to +150 °C / 10–98 % RH) aligns with common requirements in ISO 16750-4 (road vehicles), IPC-9701 (electronic interconnect reliability), and JEDEC JESD22-A104 (temperature cycling). While not intrinsically rated for hazardous locations, optional modifications may support non-explosive ambient classifications per IEC 60079-0. All units undergo factory calibration traceable to NIM (National Institute of Metrology, China) standards and support user-performed verification using external reference sensors.

Software & Data Management

Embedded firmware enables real-time data acquisition at user-defined intervals (1 s to 60 min resolution), local storage of ≥10,000 hours of timestamped temperature/humidity logs, and direct export to CSV/Excel format. Optional PC software provides advanced analysis tools—including deviation trending, pass/fail threshold mapping, and comparative overlay of multiple test runs—while maintaining full audit trail compliance for GLP/GMP environments. The cloud-enabled remote management system supports simultaneous access by up to five authenticated users across heterogeneous endpoints (iOS/Android apps, Windows/macOS browsers, tablets), with role-based permissions (read-only, parameter edit, program upload, system admin) enforced via TLS 1.2 encryption and session timeout policies. Firmware updates, log retrieval, and live parameter adjustment are executed remotely without physical intervention.

Applications

• Thermal cycling validation of solder joint fatigue resistance in printed circuit boards per IPC-TM-650 2.6.7.
• Humidity resistance assessment of conformal coatings and encapsulants under 85 °C/85 % RH bias conditions (JEDEC J-STD-020).
• Storage stability evaluation of lithium-ion battery modules across extended low-temperature discharge and high-temperature aging profiles.
• Environmental stress screening (ESS) of automotive ADAS sensors prior to AEC-Q200 qualification.
• Accelerated corrosion testing of metal-plated connectors via alternating dry/wet cycles per ASTM B117 and ISO 9227.
• Pre-conditioning of optical lenses and camera modules for thermal lensing and focus shift quantification.

FAQ

What is the standard warranty period for the THS series chamber?
DRETOP provides a 24-month limited warranty covering parts and labor for manufacturing defects, excluding consumables (e.g., humidifier tanks, filters) and damage resulting from improper installation or misuse.
Can the chamber be integrated into a centralized laboratory monitoring network?
Yes—the optional Ethernet-enabled controller supports Modbus TCP and HTTP API protocols, enabling seamless integration with LabVantage, Siemens Desigo, or custom SCADA platforms for enterprise-wide environmental data aggregation.
Is third-party calibration certification available upon delivery?
Calibration reports issued by CNAS-accredited laboratories (e.g., SGS, TÜV Rheinland) can be arranged at additional cost, including uncertainty budgets compliant with ISO/IEC 17025.
How does the system handle humidity control below 0 °C?
Below freezing, the chamber maintains relative humidity via dew-point referencing rather than RH percentage, utilizing chilled-mirror hygrometry feedback to prevent ice formation on critical sensors and sample surfaces.
Are custom interior configurations—such as reinforced shelves or vibration-isolated mounting plates—available?
Yes; DRETOP offers OEM engineering services for mechanical adaptations, including structural reinforcements, EMI-shielded enclosures, and liquid-cooled base plates, subject to minimum order quantity and lead time confirmation.