OK Instrument KS-TH-225 Rapid Temperature Transition Chamber
| Brand | OK Instrument |
|---|---|
| Model | KS-TH-225 |
| Construction | CNC-machined stainless steel (SUS304) inner chamber, A3 steel powder-coated exterior |
| Temperature Range | −70 °C to +150 °C (configurable via optional sub-zero or high-temp modules) |
| Temperature Uniformity | ≤ ±2 °C |
| Temperature Fluctuation | ±0.5 °C |
| Humidity Range | 30–98% RH |
| Humidity Deviation | +2 / −3% RH |
| Avg. Ramp Rate | 0.7–1.0 °C/min |
| Test Port | Ø50 mm |
| Time Setting Range | 0–9999 h |
| Power Supply | AC 380 V, 3-phase |
Overview
The OK Instrument KS-TH-225 Rapid Temperature Transition Chamber is an engineered environmental test system designed for accelerated thermal stress evaluation of electronic components, automotive modules, aerospace subsystems, and packaging materials under dynamically controlled temperature and humidity conditions. It operates on a dual-refrigeration + electric heating architecture with independent PID-controlled zones, enabling precise replication of real-world thermal cycling profiles—including rapid transitions between extreme low- and high-temperature states. Unlike conventional thermal chambers, the KS-TH-225 integrates optimized airflow management, high-efficiency heat exchangers, and low-inertia thermal mass design to achieve sustained ramp rates of 0.7–1.0 °C/min across its full operating range (−70 °C to +150 °C), making it suitable for IEC 60068-2-14, MIL-STD-810H Method 503.7, and JEDEC JESD22-A104D thermal shock validation protocols.
Key Features
- CNC-machined SUS304 stainless steel interior chamber with seamless welded corners and electropolished finish—resistant to corrosion, easy to decontaminate, and compliant with ISO 14644-1 Class 8 cleanroom-compatible maintenance practices
- A3 steel outer enclosure with durable epoxy-polyester powder coating for mechanical robustness and long-term structural integrity in industrial lab environments
- Large observation window with embedded heating element and tempered glass to prevent condensation—ensures unobstructed visual monitoring during sub-zero operation
- Standard Ø50 mm cable/port access with silicone gasket seal—supports integration with external data loggers, power supplies, or sensor signal conditioning units without compromising chamber integrity
- Independent temperature and humidity control loops with dual-sensor redundancy and auto-calibration traceability—meets internal quality requirements for GLP-compliant test documentation
- Intuitive touchscreen HMI with preloaded test templates (e.g., “Automotive Cold Start,” “PCB Thermal Cycling,” “Battery Charge/Discharge Cycle”) and user-defined profile programming up to 999 segments
Sample Compatibility & Compliance
The KS-TH-225 accommodates samples up to 60 × 75 × 50 cm (W × D × H) within its working volume, with sufficient clearance for fixtures, thermocouple wiring, and airflow circulation. Its chamber geometry and forced-air convection system ensure uniform thermal distribution per IEC 60068-3-5 and ASTM E145-22 Annex A3 criteria. The unit is CE-marked and conforms to EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) standards. Optional IQ/OQ documentation packages are available for GMP-regulated laboratories requiring 21 CFR Part 11–compliant audit trails, electronic signatures, and change control records.
Software & Data Management
Built-in OK-EnviroLink™ firmware supports real-time data streaming via Ethernet (Modbus TCP) or RS-485, enabling seamless integration into centralized MES or LIMS platforms. All temperature/humidity setpoints, actual readings, alarm events, and system status logs are timestamped and stored locally on an industrial-grade SD card (16 GB, included). Export formats include CSV and PDF reports with configurable metadata fields (operator ID, test ID, revision level). Remote monitoring is supported through secure HTTPS interface with role-based access control—engineers may initiate, pause, or abort tests from any authorized workstation without physical access to the chamber.
Applications
- Thermal shock testing of printed circuit assemblies per IPC-9701A and IPC-J-STD-020D.1
- Reliability screening of lithium-ion battery cells under combined temperature-humidity stress (e.g., UN 38.3 T5/T6)
- Validation of automotive ECUs against ISO 16750-4 (climate load) and SAE J2380 (thermal durability)
- Accelerated aging studies of polymer-based medical device housings per ISO 10993-12
- Material coefficient-of-thermal-expansion (CTE) correlation analysis using embedded thermistor arrays
- Pre-conditioning of optical sensors and MEMS devices prior to functional performance verification
FAQ
What is the standard warranty coverage for the KS-TH-225?
The unit includes a 24-month limited warranty covering parts and labor for defects in materials and workmanship under normal laboratory use.
Can the chamber be configured for non-standard temperature ranges?
Yes—custom configurations supporting extended low-temperature operation down to −85 °C or high-temperature excursions up to +200 °C are available upon request, subject to refrigerant system re-engineering and additional lead time.
Is humidity control available across the entire temperature range?
Humidity control is active between +10 °C and +95 °C; below +10 °C, dehumidification capability diminishes progressively due to condensation physics—this limitation is consistent with ISO 14644-3 Annex B guidance for hygrothermal test systems.
Does the system support third-party calibration traceability?
All factory-installed temperature and humidity sensors are supplied with NIST-traceable calibration certificates (as-tested data), and field recalibration services are offered annually by OK Instrument’s ISO/IEC 17025-accredited service center.
How is safety interlocked during operation?
Dual redundant door switches, over-temperature cutouts, refrigerant pressure monitoring, and emergency power-off (EPO) circuitry comply with IEC 61010-1 and UL 61010-1 requirements for Class II laboratory equipment.
