OK-YT Series Liquid Thermal Shock Test Chamber

Overview

The OK-YT Series Liquid Thermal Shock Test Chamber is a dual-zone, liquid-based thermal cycling system engineered for rapid and repeatable evaluation of material resilience under extreme temperature transitions. Unlike air-based thermal shock chambers, this system utilizes high-thermal-capacity liquid media in segregated hot and cold reservoirs—enabling faster heat transfer, tighter temperature stability, and superior thermal inertia control during shock cycles. It operates on the principle of mechanical sample transfer between thermally isolated zones via pneumatic actuation, eliminating airflow turbulence and ensuring consistent thermal loading across test specimens. Designed for compliance-driven industries—including aerospace, defense, medical device manufacturing, nuclear instrumentation, and automotive electronics—the chamber delivers traceable, reproducible thermal stress profiles required for qualification testing per MIL-STD, GJB, and IEC/ISO environmental standards.

Key Features

• Large-format color LCD touchscreen controller with intuitive HMI interface, real-time graphical display of zone temperatures, cycle progress, and alarm history
• Dual independent refrigeration circuits: high-efficiency plate-type heat exchangers coupled with binary ultra-low-temperature freezing system (R404A/R23)
• LAN-enabled Ethernet port supporting remote monitoring, parameter upload/download, and integration into centralized lab management networks
• Multi-mode operation: configurable as standalone high-temperature chamber, low-temperature chamber, or full thermal shock tester—with programmable dwell times, transition rates, and cycle counts
• Pre-conditioning logic: automatic pre-cooling or pre-heating of reservoirs prior to scheduled test initiation, minimizing start-up delays
• Intelligent defrost management: user-selectable auto/manual defrost cycles with adjustable frequency and duration, optimized to maintain long-term compressor reliability
• Robust mechanical architecture: stainless steel SUS#304 interior and exterior construction, fire-retardant polyurethane insulation (≥30 mm thickness), and precision-guided pneumatic transfer basket

Sample Compatibility & Compliance

The OK-YT chamber accommodates rigid and semi-rigid samples up to 60 kg, including printed circuit assemblies (PCBAs), hermetically sealed sensors, polymer housings, metallic fasteners, ceramic substrates, and composite structural components. Its static-test configuration—where the specimen remains stationary while thermal zones are alternately engaged via pneumatic door switching—ensures minimal mechanical disturbance and eliminates vibration-induced artifacts common in moving-basket designs. The system meets critical regulatory requirements for environmental qualification: GB/T 2423.1 (cold), GB/T 2423.2 (dry heat), GB/T 2423.22 (temperature change), GJB 150.5 (military temperature shock), GJB 360.7 (electronic component shock), and GJB 367.2 (405-series equipment validation). While not inherently FDA 21 CFR Part 11 compliant, audit-ready data logging (with time-stamped event records and user-access logs) supports GLP/GMP-aligned validation protocols when paired with validated third-party software.

Software & Data Management

The embedded controller firmware supports CSV export of full-cycle temperature logs (hot zone, cold zone, and test zone), alarm timestamps, and operational status events. Optional PC-based software (OK-LogSuite v3.2) provides advanced features including multi-chamber fleet monitoring, statistical process control (SPC) charting, deviation threshold alerts, and PDF report generation with digital signature fields. All data files include embedded metadata (operator ID, test ID, calibration certificate reference, and environmental ambient conditions) to satisfy ISO/IEC 17025 documentation requirements. Remote access is secured via TLS 1.2 encryption and role-based authentication; no cloud storage is performed by default—data residency remains fully on-premise unless explicitly configured otherwise.

Applications

This chamber serves as a core tool in accelerated reliability engineering workflows. Typical use cases include: solder joint fatigue assessment in avionics modules subjected to −65 °C/+150 °C cycling; evaluation of seal integrity in implantable medical devices under repeated thermal contraction/expansion; verification of coating adhesion on turbine blades exposed to rapid thermal gradients; screening of optical lens assemblies for delamination risk; and qualification of battery pack enclosures for electric vehicle applications per UN ECE R100 Annex 8. In academic research, it supports studies on phase-transition kinetics in shape-memory alloys and cryo-mechanical behavior of polymer nanocomposites. Its stable thermal ramp profiles also enable controlled simulation of field-service thermal transients—notably in marine electronics operating across tropical and polar deployment zones.

FAQ

What is the difference between liquid-based and air-based thermal shock chambers?

Liquid-based systems achieve faster thermal transfer due to higher specific heat capacity and thermal conductivity of liquid media versus air—resulting in shorter soak and recovery times, improved temperature uniformity, and reduced energy consumption over extended cycling.

Can the OK-YT chamber perform ramp-and-soak profiles within a single zone?

Yes—each reservoir can operate independently as a conventional high- or low-temperature chamber, supporting steady-state exposure, linear ramping, and stepwise temperature holds per IEC 60068-2-1/2/14.

Is calibration certification included with shipment?

A factory-as-built NIST-traceable calibration report (covering sensor linearity, uniformity, and control accuracy across all operational ranges) is provided standard. On-site IQ/OQ validation support is available upon request.

What maintenance intervals are recommended for the refrigeration system?

Compressor oil analysis and refrigerant purity checks every 12 months; heat exchanger cleaning every 24 months; full system performance verification annually or after 5000 thermal cycles—whichever occurs first.

Does the chamber support custom test sequences beyond standard GJB/GB protocols?

Yes—the controller accepts user-defined multi-segment programs with variable dwell times, temperature setpoints, and conditional branching (e.g., pause on alarm, resume after manual reset).