OK KS-TH-800 Fast Thermal Cycling Environmental Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | KS-TH-800 (A–D variants) |
| Temperature Range | −70 °C to +150 °C (D-series) |
| Humidity Range | 5%–98% RH |
| Temp. Resolution/Accuracy | 0.1 °C / ±0.3 °C |
| Humidity Resolution/Accuracy | 0.1% RH / ±2.5% RH |
| Temp. Ramp Rate | Up to 3.0 °C/min (heat), 1.0 °C/min (cool) |
| Internal Dimensions | 100 × 100 × 80 cm (W×D×H) |
| Construction | SUS304 stainless steel (interior mirror finish, exterior brushed) |
| Cooling System | Air-cooled dual-stage compressor (for −70 °C capability) |
| Controller | TEMI880 touchscreen PID controller (Korean origin) |
| Compressor | Tecumseh (France) |
| Compliance | Designed per IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-14, ISO 16750-4, and ASTM D4329 for accelerated aging testing |
Overview
The OK KS-TH-800 Fast Thermal Cycling Environmental Chamber is an engineered platform for accelerated environmental stress testing under precisely controlled temperature and humidity profiles. It operates on the principle of forced-air convection with independent, dynamically balanced heating, cooling, humidification, and dehumidification subsystems—enabling rapid transitions between extreme thermal and hygrothermal states. Unlike standard climatic chambers, the KS-TH-800 series supports programmable ramp rates up to 3.0 °C/min (heating) and 1.0 °C/min (cooling), making it suitable for HALT (Highly Accelerated Life Testing), thermal shock simulation, and qualification per automotive (e.g., ISO 16750-4), aerospace (MIL-STD-810H Method 502.7), and electronics reliability standards (JEDEC JESD22-A104). Its design prioritizes thermal uniformity (±2.0 °C) and humidity stability (±3.0% RH) across the full working volume—critical for reproducible aging data in R&D and QA/QC laboratories.
Key Features
- Independent dual-stage air-cooled refrigeration system enabling stable operation down to −70 °C (D-series variant)
- High-precision TEMI880 touchscreen controller with multi-segment programmability, real-time trend logging, and USB data export
- SUS304 stainless steel chamber interior (mirror-polished) and exterior (brushed finish), corrosion-resistant and compliant with cleanroom-compatible surface requirements
- Dense polyurethane foam insulation (chlorinated ethyl formate-based) offering low thermal conductivity and long-term dimensional stability
- Redundant safety architecture: compressor overheat protection, refrigerant high/low pressure cutoffs, overtemperature/overhumidity interlocks, and non-fuse circuit breakers
- Standard 50 mm test port with silicone gasket, internal LED lighting, observation window with double-layer tempered glass, and adjustable stainless steel shelves
Sample Compatibility & Compliance
The KS-TH-800 accommodates full-size PCB assemblies, automotive ECUs, polymer housings, battery modules, and medical device enclosures within its 800 L internal volume (100 × 100 × 80 cm). It meets the physical and operational prerequisites of IEC 60068-2 environmental test methods—including Test Na (salt mist), Test Ab (cold), Test Bb (dry heat), and Test Cab (damp heat, cyclic). Its humidity control system utilizes a calibrated dry-wet bulb sensor assembly and PTFE-wrapped wick, traceable to NIST-certified reference hygrometers. The chamber is routinely validated per ISO/IEC 17025 for temperature/humidity mapping and is compatible with GLP-compliant audit trails when paired with optional external data loggers meeting FDA 21 CFR Part 11 requirements.
Software & Data Management
The TEMI880 controller supports up to 100 programmable test profiles, each with 99 segments and loop repetition capability. All setpoints, actual values, alarms, and system status events are timestamped and stored onboard (≥30 days at 1-min intervals). Data export via USB flash drive yields CSV-formatted files compatible with MATLAB, JMP, and Minitab for Weibull analysis and Arrhenius modeling. Optional Ethernet or RS485 interfaces enable integration into centralized MES or LIMS platforms. Audit trail functionality—including user login history, parameter change logs, and calibration event records—is configurable to align with GMP Annex 11 and ISO 13485 documentation protocols.
Applications
- Accelerated aging of elastomers, adhesives, and conformal coatings per ASTM D4329 and ISO 188
- Thermal cycling validation of lithium-ion battery packs under combined temperature-humidity stress (UN 38.3, Section 38.3.4)
- Qualification of avionics enclosures per RTCA DO-160G Section 4 (temperature), Section 7 (humidity), and Section 22 (altitude/temperature)
- Reliability screening of automotive infotainment systems per ISO 16750-4 (road vehicle environmental conditions)
- Material compatibility testing of packaging components under tropical or arid storage profiles (ICH Q5C)
FAQ
What is the minimum achievable temperature for the KS-TH-800 model?
The D-series variant achieves −70 °C using a dual-stage air-cooled compressor system; A–C variants support −20 °C, −40 °C, and −60 °C respectively.
Can the chamber perform humidity-free thermal cycling?
Yes—the humidification and dehumidification subsystems operate independently and can be disabled while maintaining full temperature ramp control.
Is the TEMI880 controller compliant with FDA 21 CFR Part 11?
The base controller provides electronic signatures, audit trails, and password-protected parameter modification—but full Part 11 compliance requires optional software licensing and external validation documentation.
What calibration standards are supported for temperature and humidity verification?
The chamber is compatible with accredited third-party calibration using NIST-traceable platinum resistance thermometers (PRTs) and chilled-mirror hygrometers per ISO/IEC 17025.
Does OK Instruments provide IQ/OQ documentation packages?
Yes—factory-verified Installation Qualification (IQ) and Operational Qualification (OQ) protocols are available upon request, aligned with GAMP5 guidelines and user-defined URS.
