Liquid Thermal Shock Test Chamber OK-YT Series

Overview

The Liquid Thermal Shock Test Chamber OK-YT Series is a dual-bath, immersion-based thermal shock system engineered for rapid and precise evaluation of material reliability under extreme temperature transitions. Unlike air-based thermal shock chambers, this system utilizes two independent liquid baths — one heated and one cryogenically cooled — to immerse test specimens directly in thermally stable fluid media. This design enables high-rate thermal transfer via convection and conduction, achieving faster transition times (≤10 s sample exchange) and superior temperature reproducibility compared to forced-air alternatives. The chamber complies with core international test standards including IEC 60068-2-14 (Change of Temperature), MIL-STD-810H Method 503.6, and JIS C 60068-2-14, making it suitable for qualification testing in aerospace, automotive electronics, battery module development, and high-reliability PCB manufacturing.

Key Features

• Dual independent liquid baths: High-temp bath (RT to +150°C) and low-temp bath (RT to –70°C), each equipped with independent circulation, temperature control, and level monitoring.
• Precision immersion transfer mechanism: Motor-driven mechanical arm transfers samples between baths within ≤10 seconds, minimizing dwell time and ensuring repeatable thermal ramp profiles.
• Advanced TEMI880 touchscreen controller (Korean origin): Supports multi-segment programmable profiles, real-time data logging, USB export, and password-protected parameter access.
• High-fidelity sensing architecture: PT100 platinum resistance sensors for temperature (±0.1°C accuracy) and capacitive RH sensors (±1% RH accuracy) with automatic drift compensation.
• Robust thermal management: Nickel-chromium heating elements, Tecumseh hermetic compressors, and stainless-steel jacketed immersion heaters ensure long-term stability and minimal maintenance.
• Corrosion-resistant construction: Interior chamber fabricated from mirror-finished SUS304 stainless steel; exterior finished with electrostatic epoxy coating or optional brushed stainless steel (SUS304).
• Flexible fluid compatibility: Designed for operation with silicone oil (–65°C to +200°C), ethylene glycol/water mixtures, or certified low-volatility synthetic coolants — all configurable per application requirements.

Sample Compatibility & Compliance

The OK-YT Series accommodates standard test fixtures up to W30 × H20 × D30 cm (OK-YT-03 model), supporting both bare components and assembled modules (e.g., EV battery cells, MEMS sensors, LED packages, and conformally coated circuit boards). All models meet ISO/IEC 17025 calibration traceability requirements when used with accredited external verification. The system supports GLP-compliant operation through audit-trail-enabled controller firmware (user login logs, profile modification history, and timestamped event records). It is compatible with ASTM D5229/D5229M (low-temperature performance of composites), IPC-9701A (thermal cycling reliability of interconnects), and JEDEC JESD22-A104F (temperature cycling test methodology).

Software & Data Management

The integrated TEMI880 controller provides native CSV data export via USB port, with timestamps synchronized to internal RTC (real-time clock). Optional PC software (OK-DataLink v3.2) enables remote monitoring, multi-chamber fleet management, automated report generation (PDF/Excel), and alignment with FDA 21 CFR Part 11 requirements — including electronic signatures, role-based permissions, and immutable audit trails. All logged parameters (bath temperatures, humidity, cycle count, alarm status, and transfer timing) are stored internally for ≥30 days and can be archived externally without interruption to ongoing tests.

Applications

• Thermal shock validation of lithium-ion battery cells and modules under UL 1642 and UN 38.3 Clause 51.5.
• Qualification testing of avionics enclosures per DO-160 Section 4 (Temperature Variation).
• Reliability screening of solder joints and underfill adhesives in semiconductor packaging.
• Material embrittlement assessment of polymer housings, gaskets, and optical lenses at sub-zero extremes.
• Accelerated aging studies for medical device sterilization packaging (ISO 11607-1) and implantable electronics.
• Process window definition for reflow soldering and die-attach curing in high-mix electronics assembly lines.

FAQ

What liquid media are compatible with the OK-YT chamber?

Silicone oil (recommended for full –70°C to +150°C range), 30/70 ethylene glycol/water mixture (–40°C to +100°C), deionized water (0°C to +95°C), or custom-certified synthetic heat transfer fluids — all requiring viscosity and flash point verification prior to use.
Is the system compliant with FDA 21 CFR Part 11 for regulated environments?

Yes, when configured with OK-DataLink v3.2 software and enabled audit-trail mode, the system meets electronic record and signature requirements for pharmaceutical and medical device validation protocols.
Can the chamber perform humidity-controlled thermal shock?

Yes — the OK-YT series integrates humidity control (20–98% RH) in the high-temp bath only, enabling combined temperature/humidity stress profiles per IEC 60068-2-30 (Damp Heat, Cycle).
What is the typical calibration interval recommended for routine use?

Annual calibration of PT100 sensors and RH transmitters is advised; NIST-traceable certificates are provided with initial delivery and available upon request for recalibration services.
Does the system support custom sample fixture integration?

Yes — standardized mounting rails and electrical feedthroughs (up to 6 channels, 30 VDC/1 A) are available for OEM fixtures, robotic loading interfaces, or in-situ electrical monitoring during thermal cycling.