OKO Environmental Test Chamber with Large Viewing Window – Temperature and Humidity Controlled Chamber

Overview

The OKO Environmental Test Chamber with Large Viewing Window is a precision-engineered temperature and humidity controlled chamber designed for accelerated environmental stress screening (ESS), reliability validation, and climatic simulation of electronic components, automotive parts, aerospace hardware, and industrial materials. Built upon the principle of balanced heating, cooling, humidification, and dehumidification (BTHC), the chamber maintains highly stable setpoints across wide operating ranges—typically −40°C to +150°C and 20% to 98% RH—using closed-loop PID control of solid-state relays (SSRs) and high-efficiency thermal management subsystems. Its large observation window—constructed from double-layer tempered low-emissivity glass with anti-fog coating—enables real-time visual monitoring of test specimens without compromising chamber integrity or thermal uniformity. The system complies with international environmental testing standards including IEC 60068-2, MIL-STD-2164A, and GJB 1032A, supporting both qualification and production-level screening in GLP- and GMP-aligned laboratories.

Key Features

• Large-format viewing window (≥600 × 450 mm) with dual-pane thermal insulation and integrated anti-condensation heating to ensure optical clarity during high-humidity operation
• Multi-layer safety architecture: independent overtemperature cutoff, dry-run protection for steam humidifier, low-water level detection, compressor overload/overheat/overcurrent protection, high-pressure refrigerant cutout, circuit breaker, and residual-current device (RCD)
• Balanced Temperature & Humidity Control (BTHC) system using PID algorithm to dynamically match heating/humidifying output with thermal/hygric load, enabling long-term stability (<±0.5°C, <±2% RH) under continuous operation
• Full-capillary automatic capacity modulation system—replacing traditional thermostatic expansion valves—for smoother refrigerant flow, faster ramp rates, and improved energy efficiency
• Self-contained tap-water filtration and auto-replenishment system eliminates dependency on deionized or distilled water; integrated distillate recovery loop reduces consumable water usage by ≥40%
• Low-noise design: Taikang hermetic scroll compressor with acoustic enclosure and vibration-dampened mounting, achieving <60 dB(A) at 1 m distance

Sample Compatibility & Compliance

The chamber accommodates standard test specimens up to 500 mm × 500 mm × 500 mm (W×D×H), with optional custom interior dimensions available upon request. Two adjustable stainless-steel sample shelves are included as standard. All structural and control systems conform to electromagnetic compatibility (EMC) requirements per EN 61326-1 and electrical safety standards per IEC 61010-1. Calibration traceability is provided via an ISO/IEC 17025-accredited third-party certificate covering temperature (−40°C to +150°C) and relative humidity (20–98% RH) at three spatial points. The unit supports audit-ready documentation for FDA 21 CFR Part 11 compliance when paired with OKO’s optional validated software package.

Software & Data Management

Equipped with OKO’s proprietary touch-enabled controller (model TC-8000), the chamber supports intuitive programming of multi-step profiles—including ramp-soak cycles, cycling tests, and dwell sequences—with up to 100 segments per program. Real-time data logging records temperature, humidity, alarm status, and system operational parameters at user-defined intervals (1 s to 60 min). Export formats include CSV and PDF reports with digital signatures. Optional PC-based software (OKO-LogSuite v4.2) enables remote supervision, multi-chamber synchronization, electronic batch records, and 21 CFR Part 11-compliant audit trails—including user login history, parameter change logs, and electronic signature capture.

Applications

This chamber serves critical roles in product development and quality assurance workflows across regulated industries. In electronics manufacturing, it performs temperature cycling, damp heat storage, and ESS per MIL-STD-2164A to identify latent solder joint defects and intermetallic growth. Automotive suppliers use it for climate endurance testing of ECUs, sensors, and infotainment modules per ISO 16750-4. Aerospace component vendors apply it to verify seal integrity and material dimensional stability under combined thermal-hygric stress. Additionally, it supports accelerated aging studies for polymer packaging, pharmaceutical excipients, and battery electrolyte formulations where moisture ingress and thermal degradation kinetics must be quantified.

FAQ

What is the maximum allowable test load for thermal uniformity compliance?

Per IEC 60068-3-5, uniformity specifications assume ≤1/3 chamber volume occupied by thermally inert mass. For optimal performance, load mass should not exceed 30 kg with average specific heat >0.8 J/g·K.

Can the chamber operate continuously at 98% RH above 85°C?

Yes—provided cooling water inlet temperature remains ≤25°C and flow rate meets minimum 2.5 L/min requirement. At extreme conditions, humidification duty cycle increases; full-load runtime exceeds 1,000 hours with scheduled maintenance.

Is third-party calibration included with shipment?

Yes—a certified calibration report issued by an A2LA-accredited laboratory is supplied with each unit, covering 9-point temperature and 5-point humidity verification per ISO/IEC 17025.

Does the controller support Modbus RTU or Ethernet/IP for factory automation integration?

Standard TC-8000 includes RS-485 Modbus RTU interface. Optional EtherNet/IP or PROFINET modules are available for seamless PLC integration and MES data exchange.

What maintenance schedule is recommended for sustained accuracy?

Compressor oil and refrigerant filter replacement every 24 months; humidifier tank descaling every 3 months; chamber seal inspection and cleaning quarterly; annual full-system recalibration recommended.