OK Walk-in Environmental Test Chamber OK-STH-8.0000m²

Overview

The OK Walk-in Environmental Test Chamber OK-STH-8.0000m² is an engineered solution for large-scale, long-duration environmental simulation under controlled temperature and humidity conditions. Designed in accordance with ISO 16750-4, IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat cyclic), and GB/T 2423.3–2016 (constant damp heat), this chamber employs a dual-stage cascade refrigeration system for models rated to −70°C, coupled with PID-controlled steam humidification and electric heating elements. Its structural architecture integrates high-density polyurethane (PU) insulated sandwich panels (150 mm thick, thermal conductivity ≤0.022 W/m·K), stainless steel 304 inner walls, and a double-sealed tempered glass observation window. Unlike benchtop chambers, the OK-STH series supports full operator entry, enabling real-time inspection, manual sample repositioning, and integration with external power/data feedthroughs — critical for automotive ECUs, aerospace avionics racks, and industrial control cabinets undergoing extended reliability validation.

Key Features

• Modular walk-in design with field-assembled PU-insulated panels; standard internal volume: 8.0 m³ (2000 × 2000 × 2000 mm)
• Selectable temperature ranges from 0°C to +150°C up to −70°C to +150°C, configured via single-stage or dual-stage cascade refrigeration
• Temperature uniformity maintained at ±3°C across working volume per IEC 60068-3-5; control stability: ±1°C at setpoint
• Heating rate programmable between 1.0 and 4.0°C/min (average, unloaded); cooling rates vary by configuration (e.g., −40°C model: ~1.5°C/min from +25°C)
• Integrated touch-screen controller with Ethernet interface, supporting Modbus TCP and optional RS-485 for SCADA integration
• Humidity range: 20%–98% RH (optional desiccant wheel available for <20% RH operation)
• Standard safety compliance: CE-marked electrical system, over-temperature/over-humidity cut-off, door interlock, and emergency stop

Sample Compatibility & Compliance

The chamber accommodates oversized or multi-unit test articles — including vehicle instrument clusters, server racks, battery modules, and HVAC components — without disassembly. Load capacity is engineered for static floor loading up to 500 kg/m². All configurations comply with GLP and GMP documentation requirements when paired with optional audit-trail-enabled software (21 CFR Part 11 compliant). Humidity sensors are calibrated platinum resistance thermometers (Pt100) and Vaisala HUMICAP® capacitive hygrometers (traceable to NIST standards). Refrigerant options include R404A (standard) and low-GWP alternatives (R513A or R450A) upon request. Structural integrity meets ISO 13374-2 for vibration-resilient mounting in shared laboratory environments.

Software & Data Management

Bundled OK-EnviroControl™ v3.2 software provides real-time monitoring, multi-segment profile programming, and automated data logging at user-defined intervals (minimum 1-second resolution). Export formats include CSV, PDF test reports, and XML for LIMS integration. Optional features include remote access via HTTPS-secured web portal, email/SMS alarm notifications (threshold-based), and electronic signature support for regulated industries. All system events — including setpoint changes, alarm triggers, and door openings — are time-stamped and stored locally with 32 GB onboard flash memory (retention ≥12 months). Calibration logs and maintenance records are archived separately with version control.

Applications

• Automotive: Validation of ADAS ECUs, infotainment systems, and battery management units per ISO 16750-4 and LV-124
• Aerospace: Environmental stress screening (ESS) of avionics line-replaceable units (LRUs) per DO-160G Section 4 & 5
• Energy: Accelerated aging tests for grid-scale battery enclosures and solar inverters (IEC 62619, UL 1973)
• Industrial IoT: Long-term reliability assessment of edge computing nodes operating in uncontrolled ambient zones
• Research: Climate chamber studies for building material hygrothermal behavior (ISO 10456, ASTM E283)

FAQ

Is this chamber suitable for testing heat-generating devices?
Yes. The OK-STH-8.0000m² includes optional internal air circulation optimization and auxiliary cooling ducts to manage dynamic thermal loads up to 5 kW. Load compensation algorithms adjust refrigeration output in real time.
Can I integrate third-party measurement instruments through feedthrough ports?
Standard configurations include two 80 mm diameter stainless steel feedthroughs (IP65 rated) with vacuum-tight seals. Custom port layouts (electrical, pneumatic, optical) are available upon engineering review.
What is the typical lead time for delivery and commissioning?
Standard models ship within 8–10 weeks after order confirmation. On-site installation, SAT (Site Acceptance Test), and operator training require additional 3–5 days and are quoted separately.
Does OK Instruments provide calibration certificates traceable to national standards?
Yes. Each unit ships with a factory calibration certificate (temperature/humidity) issued by our ISO/IEC 17025-accredited metrology lab. Third-party NIST-traceable certification is available as an add-on service.
How does the chamber handle condensation during rapid humidity transitions?
The system employs pre-cooled dehumidification coils and dew-point-controlled steam injection to minimize transient condensation. Optional drain-heater kits prevent freezing in sub-zero humidification cycles.