OK-HC-900.0 Sand and Dust Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | OK-HC-900.0 |
| Silica Content of Test Dust | 97–99% SiO₂ |
| Sand Blowing Concentration | 1.1 g/m³ ±0.25 g/m³ to 2.2 g/m³ ±0.5 g/m³ |
| Sand Blowing Air Velocity | 0–29 m/s |
| Dust Blowing Concentration | 0.1–10.6 g/m³ ±7 g/m³ |
| Dust Blowing Air Velocity | 8.9 m/s ±1.2 m/s |
Overview
The OK-HC-900.0 Sand and Dust Test Chamber is an engineered environmental simulation system designed to evaluate the ingress protection (IP) performance, abrasion resistance, and functional reliability of equipment under controlled airborne particulate exposure. It operates on the principle of forced-air suspension and directional particle impingement—leveraging calibrated airflow dynamics and traceable, standardized test dust—to replicate real-world desert, arid, or industrial dust environments. Unlike generic climate chambers, this unit integrates precise gravimetric dust dosing, programmable wind velocity profiles, and optional thermal-humidity coupling to satisfy the stringent physical requirements of IEC 60529, ISO 20653, MIL-STD-810G/H Method 510.5, and GJB 150.12A. Its architecture supports both continuous suspension (dust) and high-velocity impact (sand) modes, enabling dual-purpose validation for commercial electronics, automotive ECUs, military avionics enclosures, and outdoor optical sensors.
Key Features
- Modular dust delivery system with vibration-fed metering and cyclonic recirculation, ensuring stable concentration control across operational ranges.
- Variable-frequency drive (VFD)-controlled centrifugal blower assembly, delivering adjustable air velocities from 0 to 29 m/s with ±0.3 m/s repeatability.
- Calibrated silica-based test dust (97–99% crystalline SiO₂), compliant with particle size distribution specifications per MIL-STD-810G Appendix C (0–150 µm).
- Independent concentration monitoring via real-time optical particle counters (OPC), traceable to NIST-traceable reference standards.
- Stainless steel 316L internal chamber construction with sealed access ports, IP65-rated electrical interfaces, and anti-static grounding provisions.
- Optional integrated temperature range: −20°C to +85°C; humidity control: 10–95% RH non-condensing—enabling combined sand/dust + thermal stress testing per MIL-STD-810H Section 510.6.
Sample Compatibility & Compliance
The OK-HC-900.0 accommodates samples up to 900 L internal volume (W×D×H: 1000 × 900 × 1000 mm), supporting both component-level DUTs (e.g., handheld radios, camera housings) and subsystem assemblies (e.g., vehicle infotainment modules, UAV flight controllers). All operational parameters—including dust concentration tolerance (±7 g/m³ at 10.6 g/m³ setpoint), velocity accuracy (±1.2 m/s at 8.9 m/s), and particle composition—are validated against documented calibration procedures aligned with ISO/IEC 17025-accredited metrology practices. The chamber meets structural and safety requirements of EN 61000-4-27 (electrostatic discharge immunity during operation) and conforms to CE marking directives for machinery (2006/42/EC) and electromagnetic compatibility (2014/30/EU). Full compliance documentation—including test reports, uncertainty budgets, and traceability certificates—is provided upon delivery.
Software & Data Management
Equipped with OK-TestSuite™ v3.2 firmware, the chamber supports fully automated test sequencing, real-time parameter logging (≥1 Hz sampling), and configurable pass/fail logic based on user-defined thresholds. Data export is available in CSV, XML, and PDF formats, with embedded digital signatures compliant with FDA 21 CFR Part 11 Annex 11 requirements for audit trails, electronic signatures, and data integrity. Remote monitoring via secure HTTPS interface enables role-based access control (admin/operator/viewer), while local storage retains ≥30 days of raw sensor logs with SHA-256 hash verification. Calibration history, maintenance records, and operator log entries are retained in a tamper-evident database, supporting GLP/GMP-aligned quality systems.
Applications
- IP5X/IP6X certification testing per IEC 60529 and GB/T 4208, including seal integrity verification for consumer electronics and industrial HMIs.
- Automotive component qualification per ISO 20653: evaluation of headlamp lenses, radar housings, and battery management system (BMS) enclosures under simulated off-road dust loading.
- MIL-STD-810G/H Method 510.5 sand/dust exposure for defense-grade communication terminals, ruggedized tablets, and unmanned ground vehicle (UGV) sensors.
- Abrasion resistance assessment of protective coatings, AR-coated optics, and polymer-based front panels using quantitative mass-loss measurement post-test.
- Long-term storage validation for aerospace ground support equipment exposed to arid depot environments (e.g., Middle East, Central Asia).
FAQ
What dust standards does the OK-HC-900.0 support?
It is configured for Arizona Test Dust (ATD) equivalent silica powder meeting MIL-STD-810G Appendix C particle size distribution, as well as custom blends per customer-specified ISO 12103-1 A2/A4 grades.
Can the chamber perform simultaneous temperature, humidity, and dust exposure?
Yes—when equipped with the optional thermo-hygro module, it executes synchronized multi-stress profiles per MIL-STD-810H Section 510.6 and IEC 60068-2-68.
Is third-party calibration included with delivery?
Each unit ships with a full factory calibration certificate covering airflow velocity, dust concentration, and temperature/humidity sensors, traceable to national metrology institutes.
How is dust recovery and filtration managed?
A multi-stage filtration system—comprising pre-filter, HEPA H14 (99.995% @ 0.3 µm), and activated carbon post-filter—ensures >99.97% particulate retention and operator safety during maintenance cycles.
Does the system support automated test report generation?
Yes—OK-TestSuite™ generates compliant reports with embedded metadata, signature fields, revision history, and cross-referenced standard clauses for audit readiness.
