OK-SH Series Environmental Test Chamber for Combined Temperature-Humidity-Salt Spray Cycling
| Brand | OK Instruments |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | RT+10°C to 50°C |
| Humidity Range | 85–98% RH |
| Temperature Uniformity | ≤2°C |
| Temperature Fluctuation | ±0.5°C |
| Salt Solution Concentration | 0.1–1% v/v |
| Spray Method | Compressed Air Atomization (PYREX Glass Nozzle) |
| Saturated Air Tank Control | Henry’s Law-Based Heating & Humidification |
| Test Modes | Continuous Salt Spray (ASTM B117), Cyclic Salt Spray (GB/T 10587, ISO 9227), NSS/ASS/CASS Protocols |
| Chamber Models | OK-SH-60 (850×1300×600 mm), OK-SH-80 (850×1600×600 mm), OK-SH-120 (900×2000×600 mm) |
Overview
The OK-SH Series Environmental Test Chamber is an engineered solution for accelerated corrosion testing under dynamically controlled temperature, humidity, and salt fog conditions. Designed in accordance with internationally recognized test standards—including ASTM B117 (neutral salt spray), ISO 9227 (NSS, ASS, CASS), and GB/T 10587 (cyclic salt spray)—this chamber enables precise simulation of aggressive atmospheric environments encountered in automotive, aerospace, marine, and electronics industries. Its core architecture integrates three interdependent environmental subsystems: a PID-controlled thermal chamber, a saturated air conditioning system governed by Henry’s Law principles, and a precision PYREX glass nozzle-based atomization system. Unlike single-parameter salt spray cabinets, the OK-SH series supports programmable transition sequences between temperature-humidity phases and salt fog exposure—enabling realistic replication of diurnal or seasonal environmental stress cycles. The chamber’s structural integrity is reinforced with corrosion-resistant stainless steel 316L interior cladding and double-wall insulation, ensuring long-term stability during extended qualification runs.
Key Features
- Triple-environment control: independent regulation of chamber temperature (RT+10°C to 50°C), relative humidity (85–98% RH), and sodium chloride aerosol concentration (0.1–1% v/v).
- PYREX borosilicate glass nozzles ensure uniform, non-clogging雾 dispersion; conical spray tower with adjustable diffuser directs mist vertically downward at defined impact angles.
- Saturated air tank maintains thermodynamic equilibrium via electric heating and water vapor saturation—critical for stable fog generation per ISO 9227 requirements.
- Dual safety architecture: independent overtemperature cut-off relays + real-time water-level monitoring with auto-refill function to prevent test interruption.
- Digital PID temperature controller with ±0.1°C accuracy; steam-direct heating system achieves rapid, uniform chamber warm-up (≤15 min from 25°C to 50°C).
- Programmable cycle sequencing: users define dwell times, ramp rates, and phase transitions between dry heat, high-humidity soak, and salt fog exposure.
Sample Compatibility & Compliance
The OK-SH chamber accommodates specimens up to 2000 mm wide (OK-SH-120 model), supporting full-size automotive trim components, printed circuit board assemblies, coated fasteners, and galvanized sheet metal panels. Internal dimensions are optimized to meet minimum specimen spacing requirements specified in ASTM B117 (≥25 mm from chamber walls) and ISO 9227 (≥150 mm from nozzle tip). All models comply with electromagnetic compatibility (EMC) per IEC 61326-1 and electrical safety per IEC 61010-1. Calibration traceability follows ISO/IEC 17025 guidelines, and operational logs support GLP/GMP audit readiness when paired with optional data-logging modules.
Software & Data Management
The integrated touch-panel controller supports multi-step profile programming with up to 99 cycles and 999 segments per cycle. Real-time parameter logging (temperature, humidity, spray duration, saturation tank status) is stored internally (≥30 days) and exportable via USB 2.0. Optional Ethernet connectivity enables remote monitoring and integration into centralized lab management systems (LIMS). Audit-trail functionality records all user actions—including parameter modifications, start/stop commands, and alarm events—with timestamps and operator ID—meeting FDA 21 CFR Part 11 requirements when validated.
Applications
This chamber is routinely deployed for: corrosion resistance validation of electroplated coatings (Zn/Ni, Cr, Sn); evaluation of anti-corrosion inhibitors in automotive coolants; qualification of conformal coatings on PCBs per IPC-CC-830B; comparative lifecycle testing of polymer gaskets under combined hygrothermal-salt stress; and accelerated aging of offshore wind turbine fasteners per DNV-RP-F112. It is also used in R&D labs to correlate laboratory-induced corrosion morphology (e.g., pitting density, white rust formation) with field exposure data per ISO 12944-9.
FAQ
What standards does the OK-SH chamber support for cyclic corrosion testing?
It fully complies with ISO 9227 (NSS/ASS/CASS), ASTM B117 (continuous salt spray), ASTM D6899 (cyclic corrosion testing), GB/T 10587, and JIS Z 2371.
Can the chamber operate without continuous supervision?
Yes—the auto-refill water system, dual overtemperature protection, and fault-logging capability enable unattended operation for up to 96 hours.
Is calibration documentation provided with shipment?
Each unit ships with a factory calibration certificate covering temperature uniformity, humidity accuracy, and spray rate verification—traceable to NIST-certified reference standards.
What maintenance intervals are recommended for the PYREX nozzle assembly?
Visual inspection every 50 hours of cumulative spray time; ultrasonic cleaning recommended after each CASS test sequence due to copper-acetate residue accumulation.
Does the chamber support custom test profiles beyond standard protocols?
Yes—the controller allows user-defined ramp rates, dwell times, and conditional triggers (e.g., “initiate salt spray only after chamber reaches 45°C ±0.5°C”).
