OK KS-TH-225.0 Rapid Temperature Change Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic (China) |
| Model | KS-TH-225.0 |
| Price | USD 7,000 (FOB Guangdong) |
Overview
The OK KS-TH-225.0 Rapid Temperature Change Chamber is an engineered environmental test system designed to subject electronic components, aerospace subsystems, automotive ECUs, and semiconductor packages to controlled, high-rate thermal transients. Unlike conventional temperature cycling chambers operating at 1–3 °C/min, this chamber achieves programmable average ramp rates of 5–25 °C/min across its full operating range — a performance threshold essential for simulating real-world thermal stress events such as rapid altitude changes, vehicle power-on/off cycles, or logistics-induced ambient shifts. Its core architecture implements Couette-flow-optimized air circulation, dual-stage cascade refrigeration with R404A/R23 refrigerant pairs, and high-density NiCr heating elements, enabling precise, repeatable thermal profiles compliant with IEC 60068-2-14 Test N, MIL-STD-202G Method 107, and MIL-STD-810H Method 503.4.
Key Features
- Programmable linear ramp rates from 5 to 25 °C/min (average, unloaded, per IEC 60068-2-14 Annex B)
- Temperature range: −70 °C to +150 °C (standard configuration; optional extension to −80 °C available)
- Internal working volume: 225 L (W 600 × H 750 × D 500 mm), stainless steel 304 inner chamber with electropolished finish
- Dual-stage cascade refrigeration system with independent high/low-stage compressors, oil separator, and hot-gas bypass control
- High-efficiency axial fan array (3 × 400 W) delivering ≥4.2 m/s airflow velocity at chamber center
- Industrial-grade PLC controller with 10.4″ TFT touchscreen, 1 GB internal storage, and USB export capability
- Real-time PID-based temperature regulation with ±0.3 °C uniformity (at 25 °C) and ±0.5 °C stability (±0.3 °C typical)
- Compliance-ready data logging: timestamped temperature readings at 1-second intervals, audit trail, and user-access-level permissions
Sample Compatibility & Compliance
The KS-TH-225.0 accommodates samples up to 45 kg total mass without derating specified ramp performance — verified per IEC 60068-2-14 Clause 6.2 load validation protocol. Internal mounting rails (M6 threaded) and optional sample trays support PCB fixtures, DUT carriers, and MIL-STD-704-compliant harness assemblies. The chamber meets structural and safety requirements of EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions), and supports GLP/GMP traceability through optional 21 CFR Part 11-compliant software add-ons. It is routinely deployed in AEC-Q200-compliant component qualification, JEDEC JESD22-A104 thermal cycling validation, and ISO/IEC 17025-accredited lab workflows.
Software & Data Management
Built-in OK-TCMS v3.2 firmware enables creation of multi-segment thermal profiles with dwell, ramp, and hold phases, including conditional branching (e.g., “if T ≥ 120 °C, activate auxiliary cooling”). Raw sensor data (Pt100 Class A, 4-wire) is logged to internal flash memory with SHA-256 checksum integrity verification. Export formats include CSV (ISO 8601 timestamps), PDF test reports (with digital signature fields), and XML for LIMS integration. Optional OK-CloudLink module provides encrypted TLS 1.3 remote monitoring, alarm SMS/email notifications, and centralized fleet management for multi-chamber installations.
Applications
- Aerospace: Thermal stress screening of avionics enclosures, satellite thermal control subsystems, and UAV battery modules under simulated stratospheric descent profiles
- Automotive: Validation of ADAS camera housings, power inverters, and infotainment head units per ISO 16750-4 and GMW3172 Section 5.3.2
- Semiconductor: Burn-in acceleration of stacked-die packages, wafer-level CSPs, and SiC MOSFET modules using JEDEC JESD22-A106B-compliant profiles
- Medical Electronics: Reliability assessment of implantable pulse generator housings and diagnostic imaging console subassemblies per IEC 60601-1 Clause 11.2
- Defense Systems: Environmental stress screening (ESS) of tactical radios, EO/IR sensors, and missile guidance electronics per MIL-STD-883 Method 1010.8
FAQ
What is the minimum achievable ramp rate with full thermal load?
With 45 kg stainless steel mass (specific heat ≈ 500 J/kg·K), the chamber maintains ≥4.2 °C/min average ramp rate from −40 °C to +85 °C, verified per IEC 60068-2-14 Annex B calibration procedure.
Does the system support nitrogen purge or low-humidity operation?
Yes — optional LN₂ injection port (DN15 flange) and desiccant-based dry-air purge kit are available for dew point control down to −40 °C.
Is third-party calibration documentation included?
Each unit ships with NIST-traceable factory calibration certificate (temperature uniformity, stability, and ramp accuracy), valid for 12 months.
Can the controller interface with SCADA or MES systems?
Standard Modbus TCP/IP and optional OPC UA server enable seamless integration into Industry 4.0 manufacturing execution environments.
What maintenance intervals are recommended for the cascade refrigeration system?
Compressor oil analysis every 2,000 operational hours; full refrigerant circuit inspection and filter-drier replacement every 12 months or 4,000 hours — whichever occurs first.
