DRETOP THS-B400-II High-Low Temperature Environmental Test Chamber

Overview

The DRETOP THS-B400-II High-Low Temperature Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of industrial components and finished products under precisely controlled thermal conditions. Based on the principle of forced-air convection with independent heating and refrigeration circuits, the chamber delivers high-fidelity simulation of extreme temperature profiles—including static high-temperature hold, low-temperature soak, rapid thermal cycling, and combined temperature-humidity profiles (when equipped with optional humidity control). Its operational range of −40 °C to +150 °C meets the requirements of key international test standards such as IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and MIL-STD-810G Method 502.6 (temperature shock). The chamber is widely deployed in R&D laboratories, quality assurance departments, and third-party certification facilities serving electronics, automotive, aerospace, LED lighting, medical device, and instrumentation sectors.

Key Features

• Full-color 7-inch capacitive touchscreen interface supporting dual-language (English/Chinese) operation and hierarchical user permissions—up to 10 configurable accounts with customizable access rights (e.g., operator, engineer, administrator).
• Advanced programmable logic controller enabling up to 1000 stored test programs, each containing up to 100 individual segments with independent ramp/soak settings, slope-controlled transitions, and event-triggered actions (e.g., lighting activation, data logging start).
• Independent thermal subsystems: Nickel-chromium alloy heating elements paired with high-efficiency centrifugal circulation fans; hermetically sealed, low-GWP refrigerant compressor system with electronic expansion valve for precise cold-side modulation.
• Optimized airflow architecture featuring double-layer insulated wind tunnels and tangential air distribution—ensuring ≤ ±0.5 °C temperature uniformity across the full 400 L working volume (800 × 600 × 850 mm internal dimensions).
• Double-glazed, heated observation window with anti-frost film and integrated LED illumination—prevents condensation-induced sample contamination and enables real-time visual inspection without thermal disturbance.
• Robust mechanical construction: Cold-rolled steel outer shell with electrostatic epoxy coating; 304 stainless-steel interior with seamless arc-welded corners; silicone rubber door gasket maintaining integrity from −40 °C to +150 °C.
• Comprehensive safety architecture including over-temperature cut-off, compressor/fan motor overload detection, ground-fault circuit interruption, and automatic power recovery after grid interruption.
• Standard 50 mm diameter test port with brass flange and silicone plug—enabling in-situ electrical signal, pneumatic line, or thermocouple feedthrough during active testing.

Sample Compatibility & Compliance

The THS-B400-II accommodates a broad spectrum of physical samples—from PCB assemblies and automotive ECUs to polymer housings and optical sensors—without requiring modification to specimen geometry or mounting fixtures. Its internal volume allows vertical stacking of standard ISO/IEC-compliant test specimens up to 600 mm in height. The chamber complies with core design and performance criteria outlined in IEC 60068-3-5 (methods for determining temperature change rates) and ASTM E145-22 (specification for gravity-convection and forced-ventilation ovens). While not intrinsically explosion-proof, it may be operated in non-hazardous classified areas per NEC Article 500. Optional humidity add-ons extend compliance to IEC 60068-2-78 (damp heat, cyclic) and JEDEC JESD22-A108 (temperature/humidity bias life test). For regulated industries, the embedded controller supports time-stamped, tamper-evident data logs compatible with FDA 21 CFR Part 11–aligned validation protocols when used with qualified software packages.

Software & Data Management

Data acquisition and remote supervision are enabled via embedded Ethernet/Wi-Fi connectivity and DRETOP’s proprietary CloudLink™ platform. Users may monitor real-time chamber status—including setpoint, actual temperature, ramp rate, elapsed cycle time, and alarm history—from any HTML5-compatible browser or native iOS/Android application. Concurrent access by up to five users is supported, with role-based visibility controls preventing unauthorized parameter changes. All logged data—including temperature traces, program execution logs, and system diagnostics—are timestamped, digitally signed, and exportable in CSV or Excel format. Optional RS485 Modbus RTU or USB-C interfaces permit integration into centralized MES or LIMS environments. Audit trail functionality records all user logins, parameter edits, and manual overrides—supporting GLP and GMP documentation requirements.

Applications

• Thermal cycling reliability assessment of solder joints and wire bonds in printed circuit boards (IPC-9701)
• High-temperature aging of lithium-ion battery modules per UL 1642 and UN 38.3 Section 4.4
• Low-temperature functional verification of automotive ADAS sensors and infotainment controllers (SAE J1211)
• Material coefficient-of-thermal-expansion (CTE) characterization via dimensional metrology under thermal load
• Accelerated life testing of elastomeric seals and gaskets per ASTM D573
• Pre-conditioning of calibration standards prior to metrological evaluation
• Environmental stress screening (ESS) of avionics hardware per MIL-STD-810G Method 511.6

FAQ

What is the maximum allowable ambient temperature for continuous operation?
The chamber is rated for installation in rooms maintained at 15–30 °C with ≤ 80% RH non-condensing ambient conditions. Operation above 30 °C may reduce cooling capacity and increase compressor duty cycle.
Can the THS-B400-II be validated for IQ/OQ/PQ protocols?
Yes—DRETOP provides factory-assembled qualification kits including calibrated NIST-traceable PT100 probes, mapping thermocouples, and documented test scripts aligned with ISO/IEC 17025 and ASTM E2500 guidelines.
Is remote firmware update supported?
Firmware upgrades are delivered via secure HTTPS channel through the CloudLink™ portal and require administrator-level authentication prior to installation.
What is the expected mean time between failures (MTBF) for the refrigeration system?
Based on field data from >2,000 installed units, the compressor-driven cooling system demonstrates an MTBF exceeding 12,000 hours under typical laboratory usage patterns (8 h/day, 5 days/week).
Does the unit comply with RoHS and REACH directives?
All structural materials, wiring harnesses, and electronic subassemblies meet EU Directive 2011/65/EU (RoHS 2) and Regulation (EC) No 1907/2006 (REACH), with full material declarations available upon request.