OK-HC-900.121 Sand and Dust Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | OK-HC-900.121 |
| Silica Content | 97–99% SiO₂ |
| Blowing Sand Concentration | 1.1 g/m³ ±0.25 g/m³ to 2.2 g/m³ ±0.5 g/m³ |
| Blowing Sand Velocity | 0–29 m/s |
| Blowing Dust Concentration | 0.1–10.6 g/m³ ±7% |
| Blowing Dust Velocity | 8.9 m/s ±1.2 m/s |
Overview
The OK-HC-900.121 Sand and Dust Test Chamber is a precision-engineered environmental test system designed to replicate controlled airborne particulate environments in accordance with internationally recognized ingress protection (IP) and durability standards. It operates on the principle of forced-air suspension and directional particle delivery, enabling reproducible simulation of both low-velocity dust deposition (IP5X) and high-velocity sand abrasion (IP6X). The chamber employs a closed-loop recirculation architecture with integrated silica-based particulate generation, allowing for stable, quantifiable exposure conditions across defined concentration and velocity ranges. Its primary engineering objective is to assess the integrity of enclosure seals, surface erosion resistance of coatings and optical components, functional reliability under prolonged particulate exposure, and post-test performance retention — all critical parameters for products deployed in arid, desert, or industrial outdoor environments.
Key Features
- Stainless steel inner chamber constructed from SUS 304 grade material for long-term corrosion resistance and ease of particulate decontamination.
- Dual-layer silicone gasketed door seal and abrasion-resistant observation window ensure zero particulate leakage during operation.
- Adjustable-speed rotating sample turntable (optional or standard per configuration) compliant with IEC 60529 requirements for IP6X testing.
- High-efficiency particulate air (HEPA) filtration system with automatic shutdown interlock prevents ambient contamination during chamber access.
- Programmable PLC-based controller with 7-inch color touchscreen interface supports multi-step test profiles, real-time parameter logging, and data export via USB or Ethernet.
- Integrated safety protections include over-current cutoff, motor thermal overload detection, door-open interlock, and temperature monitoring of critical drive components.
- Optimized aerodynamic ducting design featuring Venturi nozzles and conical sedimentation funnels ensures uniform particle distribution and minimal stratification within the test volume.
Sample Compatibility & Compliance
The OK-HC-900.121 accommodates samples up to 900 mm × 900 mm × 900 mm (W×D×H), supporting common automotive lighting assemblies, ECUs, sensor housings, outdoor telecom enclosures, consumer electronics, and industrial control units. It is fully aligned with the test methodologies specified in IEC 60529 / GB/T 4208 for IP5X and IP6X classification. Additional compliance includes ISO 20653 for road vehicles, MIL-STD-810G/H Method 510.5 (Sand and Dust), and GJB 150.12A for military equipment qualification. All operational parameters — including airflow velocity tolerance, concentration stability, and temporal repeatability — are validated against these standards during factory calibration and documented in the supplied Certificate of Conformance.
Software & Data Management
The embedded control software enables full parametric programming of test cycles, including ramped wind speed profiles, timed dust injection sequences, and dwell periods. All operational data — including real-time wind velocity (measured via calibrated hot-wire anemometry), chamber pressure differential, elapsed time, and cumulative exposure duration — are timestamped and stored internally for ≥30 days. Export formats include CSV and PDF reports compatible with laboratory information management systems (LIMS). Audit trail functionality meets GLP and GMP documentation requirements, with user-access logs, parameter change history, and electronic signature support available upon request. Remote monitoring and alarm notification via Modbus TCP or optional IoT gateway integration are supported for enterprise-level quality assurance workflows.
Applications
- IP rating verification for electronic enclosures, connectors, and handheld devices per IEC 60529.
- Abrasion resistance evaluation of anti-reflective coatings on automotive headlamp lenses and camera optics.
- Long-term storage validation of battery management systems and energy storage cabinets intended for Middle Eastern or North African deployment.
- Functional endurance testing of UAV propulsion controllers exposed to airborne grit during takeoff/landing in unprepared airstrips.
- Qualification of aerospace avionics cooling vents and filter housings under simulated desert operational conditions.
- Material compatibility screening for gaskets, O-rings, and elastomeric seals subjected to cyclic particulate loading.
FAQ
Does the OK-HC-900.121 support automated dust concentration feedback control?
Yes — optional closed-loop concentration monitoring is available using laser scattering particle counters with analog output integration into the main PLC.
Can the chamber operate continuously for extended durations (e.g., 72+ hours)?
It is rated for uninterrupted operation up to 168 hours, subject to scheduled filter maintenance intervals and ambient cooling capacity.
Is silica dust included with the system, or must it be procured separately?
Standard delivery includes one initial charge of certified 97–99% SiO₂ test dust; subsequent consumables are available as part numbers with traceable batch certification.
What documentation is provided for regulatory audit readiness?
Each unit ships with a Factory Calibration Report, Installation Qualification (IQ) checklist, Operational Qualification (OQ) protocol template, and full electrical schematics.
How is airflow uniformity verified during commissioning?
Uniformity is confirmed per ISO 16750-3 Annex B using a minimum of nine-point traverse measurements across the test volume, with velocity deviation ≤±15% of setpoint.
