OK Instruments OK-TH-80.0 Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK Instruments OK-TH-80.0 Temperature and Humidity Controlled Environmental Test Chamber is an engineered benchtop system designed for precise, repeatable simulation of ambient and stress-level thermal-hygrometric conditions in laboratory and quality assurance environments. Based on forced-air convection with dual-loop PID-controlled heating and refrigeration circuits, the chamber maintains stable setpoints across its operational envelope—15 °C to 45 °C and 30–98 %RH—enabling standardized environmental stress screening per international test protocols. Its compact footprint (600×500×400 mm internal volume) supports accelerated aging, reliability validation, and pre-compliance verification for electronic components, automotive ECUs, polymer packaging, aerospace subassemblies, and pharmaceutical primary packaging materials. The system operates without water connection or external chiller, relying on a hermetically sealed, low-noise R404A/R23 cascade refrigeration unit optimized for long-term stability under continuous duty cycles.

Key Features

• Industrial-grade 7-inch color touchscreen controller with real-time graphing, data logging, and bilingual (English/Chinese) interface support
• Dual-layer high-tension silicone rubber door gasket ensuring leak-tight sealing and minimal RH drift during cyclic operation
• Double-glazed observation window with integrated ITO-coated conductive film for anti-fog viewing and uninterrupted visual monitoring
• Internal construction from electropolished SUS#304 stainless steel—fully welded, passivated, and corrosion-resistant to condensate and saline mist exposure
• Standard 50 mm diameter cable port (left-side mounted) with silicone plug and grounding terminal for external sensor integration or power feedthrough
• Four adjustable leveling feet and four swivel casters for flexible lab placement and vibration isolation
• Comprehensive safety architecture including over-temperature cutoff, compressor high-pressure shutdown, humidity sensor fault detection, and emergency power disconnect relay

Sample Compatibility & Compliance

The OK-TH-80.0 accommodates samples up to 35 kg distributed evenly across two adjustable SUS#304 shelves. Its uniformity performance—±2 °C temperature deviation and ±3 %RH humidity deviation—meets the spatial homogeneity requirements of IEC 60068-3-5 for chamber qualification. The system is factory-calibrated and supplied with traceable NIST-traceable calibration certificates for temperature and relative humidity sensors. It supports full audit trails required under GLP and ISO/IEC 17025-accredited testing labs, with optional firmware upgrades enabling 21 CFR Part 11-compliant electronic signatures and user-access control logs. All test profiles—including ramp-soak-cycling sequences—can be exported as CSV or PDF reports compliant with internal QA documentation systems.

Software & Data Management

The embedded controller records time-stamped temperature and humidity values at user-selectable intervals (1s to 60min). Data is stored onboard (≥100,000 points) and exportable via USB 2.0 to PC-compatible spreadsheet formats. Optional OK-Link PC software provides remote monitoring, multi-chamber synchronization, alarm email/SMS notification (via Ethernet or RS485 gateway), and automated report generation aligned with ISO 17025 Annex A.5 documentation standards. Firmware updates are delivered via secure HTTPS portal with version rollback capability and SHA-256 signature verification.

Applications

• Electrical/electronic component validation per JEDEC JESD22-A104 (Temperature Cycling) and JESD22-A101 (Damp Heat)
• Automotive parts qualification to ISO 16750-4 (Climate Load) and GMW15053 (Humidity Resistance)
• Pharmaceutical packaging stability per ICH Q1A(R2) and USP environmental storage condition mapping
• Polymer and composite material hygrothermal aging per ASTM D5229/D5229M and ISO 62
• Coating adhesion and blistering assessment under cyclic humidity per ASTM D714 and ISO 4628-2
• Calibration lab reference environment for weighing, dimensional metrology, and optical alignment setups

FAQ

What is the maximum sample weight the OK-TH-80.0 can accommodate without compromising uniformity?
The chamber supports up to 35 kg total load across both shelves when distributed symmetrically; exceeding this may affect airflow dynamics and increase localized gradients beyond specified uniformity limits.
Does the system include validation documentation for ISO/IEC 17025 compliance?
Yes—each unit ships with a Factory Calibration Certificate traceable to NIST standards, IQ/OQ documentation templates, and optional UKAS-accredited third-party validation support.
Can the controller log data continuously for 30 days?
Yes—the internal memory retains ≥100,000 data points; at 1-minute logging intervals, this exceeds 69 days of continuous recording.
Is remote access possible via Ethernet or Wi-Fi?
Ethernet connectivity is standard; Wi-Fi requires an external industrial-grade adapter (not included) and must comply with site IT security policies.
What maintenance is required for the refrigeration system?
No routine refrigerant servicing is needed; annual inspection of condenser coil cleanliness, door seal integrity, and sensor calibration drift is recommended per manufacturer guidelines.