DRETOP THS-B225-II High-Low Temperature Environmental Test Chamber

Overview

The DRETOP THS-B225-II High-Low Temperature Environmental Test Chamber is an engineered thermal stress testing platform designed for rigorous evaluation of material and component reliability under controlled, programmable temperature extremes. Operating on a dual-mode refrigeration-heating principle—employing high-efficiency hermetic compressors for cooling and Ni-Cr alloy resistive heaters for precise heating—the chamber delivers stable, repeatable thermal environments across a wide operational range of -40 °C to +150 °C. Its core architecture follows the fundamental requirements of accelerated environmental aging tests, enabling simulation of thermal shock, steady-state high/low temperature exposure, and stepwise or ramped thermal cycling protocols. The chamber meets foundational design criteria for laboratory-grade environmental simulation per IEC 60068-2 series standards and supports test method development aligned with ASTM D4329 (plastics), ISO 4892-2 (polymeric materials), and MIL-STD-810G Method 502.6 (temperature cycling). It is not rated for explosive atmospheres and is intended for use in non-hazardous industrial R&D, QC, and validation laboratories.

Key Features

• Full-color 7-inch capacitive touchscreen HMI with bilingual (English/Chinese) interface, multi-tier user permission management (up to 10 configurable accounts), and password-protected parameter editing to prevent unauthorized configuration changes.
• Advanced programmable logic: Supports up to 1000 stored test programs, each comprising up to 100 individual segments with independent ramp rates, dwell times, and setpoint transitions—enabling complex thermal profiles including rapid thermal cycling and hold-and-soak sequences.
• Independent control loops for heating, cooling, and optional humidity modules (not included in THS-B225-II base configuration), minimizing cross-interference and improving system stability and energy efficiency.
• Optimized forced-air convection system featuring centrifugal fans and aerodynamically tuned wind tunnels, ensuring ≤2 °C temperature uniformity across the 225 L working volume (600 × 500 × 750 mm).
• Heated double-glazed observation window with anti-frost coating and integrated LED lighting—eliminates condensation during low-temperature operation and enables real-time visual monitoring without thermal disturbance.
• Robust mechanical construction: 304 stainless steel interior chamber with seamless arc-welded corners; powder-coated cold-rolled steel exterior; silicone rubber door gasket maintaining integrity from -40 °C to +150 °C.
• Comprehensive safety architecture: Dual-stage over-temperature cutoff, compressor/fan motor overload protection, ground-fault circuit interruption (GFCI), and automatic power recovery after mains interruption.
• Standard 50 mm diameter test port with EPDM sealing collar—compatible with electrical feedthroughs, pneumatic lines, or sensor cables for in-situ monitoring of powered or signal-active specimens.

Sample Compatibility & Compliance

The THS-B225-II accommodates a broad spectrum of non-hazardous test specimens—including printed circuit boards (PCBs), automotive ECUs, LED modules, polymer housings, battery cells, optical sensors, and precision instrumentation components—within its 225 L workspace. Two adjustable stainless steel shelves (included) allow vertical stratification for multi-sample parallel testing. While the base model is configured for dry thermal testing only, it is mechanically and electrically pre-wired for optional humidification module integration (sold separately), extending compliance to combined temperature-humidity stress tests per IEC 60068-2-30. All electronic controllers are CE-marked and comply with EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. The system’s data logging functionality supports audit-ready traceability when used under GLP or GMP-aligned quality systems—though formal 21 CFR Part 11 compliance requires supplementary IT validation by the end user.

Software & Data Management

The embedded controller firmware provides native data acquisition at 1-second intervals, storing time-stamped temperature readings internally for up to 30 days. Data export is supported via USB flash drive in CSV and Excel-compatible formats, with optional graphical trend visualization (temperature vs. time) directly on the display. For networked operation, the chamber integrates with DRETOP’s cloud-based remote management platform via Ethernet or Wi-Fi—enabling secure web-browser access (HTML5), real-time dashboard viewing, remote program upload/download, and push notifications for alarm events. Mobile applications for iOS and Android mirror the local HMI layout exactly, supporting concurrent access by up to five users. Remote firmware updates and diagnostic logs are accessible through role-based administrator portals, facilitating preventive maintenance scheduling and technical support escalation without on-site intervention.

Applications

This chamber is routinely deployed in electronics manufacturing for thermal cycling qualification of solder joints (per IPC-9701), automotive Tier-1 suppliers conducting climate endurance validation of infotainment displays and ADAS sensors, and academic materials science labs investigating glass transition behavior in thermoplastics. It serves as a primary tool for pre-compliance screening prior to third-party certification testing, supports failure mode analysis (FMEA) of thermal-induced delamination or coefficient-of-thermal-expansion (CTE) mismatch, and fulfills internal product lifecycle testing requirements for consumer electronics, medical devices, and aerospace subassemblies. Its programmable ramp/dwell flexibility also makes it suitable for process development studies such as annealing profile optimization and low-temperature storage stability assessment.

FAQ

What is the standard warranty period for the THS-B225-II?
DRETOP provides a 24-month limited warranty covering parts and labor for defects in materials and workmanship under normal laboratory use.
Can this chamber be validated for IQ/OQ/PQ protocols?
Yes—the unit includes factory calibration certificates for temperature sensors and is supplied with a traceable NIST-style calibration report. Users may perform installation, operational, and performance qualification using standard PT100 probes and external reference standards.
Is remote software update capability built-in?
Yes—firmware updates can be delivered over-the-air via the cloud platform or manually loaded via USB, with version rollback and integrity checksum verification.
Does the chamber meet any specific energy efficiency standards?
It complies with China’s GB 12021.2-2015 energy labeling requirements for environmental test equipment and features variable-speed compressor control and intelligent fan modulation to minimize power consumption during stabilization phases.
What documentation is provided with shipment?
Each unit ships with an English-language user manual, electrical schematic diagram, CE Declaration of Conformity, factory calibration record, and packing list—all in digital PDF format on a supplied USB drive.