Compact Temperature and Humidity Controlled Chamber – OK-TH Series

Overview

The OK-TH Series Compact Temperature and Humidity Controlled Chambers are engineered for precision environmental simulation in laboratory and quality assurance settings where space efficiency, regulatory traceability, and thermal-hygrometric reproducibility are critical. These benchtop-scale chambers operate on the principle of forced-air convection combined with dual-stage refrigeration and PID-controlled steam humidification, enabling stable and repeatable exposure conditions across a wide operational envelope—from extreme cold (-70 °C) to high-temperature dry heat (+150 °C), and from low-humidity desiccation (5 %RH) to saturated condensing environments (98 %RH). Designed to meet the physical stress testing requirements of electronic components, polymer specimens, aerospace subsystems, and pharmaceutical packaging, the OK-TH platform delivers metrologically sound environmental profiles aligned with internationally recognized test standards including IEC 60068-2, MIL-STD-810G (as implemented in GJB150.3 and GJB150.4), and GB/T 2423 series protocols.

Key Features

• Full-color LCD touchscreen controller with real-time graphing, programmable multi-step profiles, and bilingual (English/Chinese) UI—supporting intuitive setup and operator training in multinational facilities.
• Double-sealed chamber door with high-tensile silicone gasket and magnetic closure ensures long-term integrity under cyclic thermal stress and prevents moisture leakage during high-humidity operation.
• Multi-layer observation window with embedded indium tin oxide (ITO) conductive film maintains optical clarity while preventing condensation and electrostatic interference during live monitoring of sample behavior.
• Internally and externally constructed from electropolished SUS#304 stainless steel—resistant to corrosion from salt spray, organic solvents, and condensate accumulation over extended service life.
• Dual-stage hermetic refrigeration system using environmentally compliant R404A/R23 refrigerants enables rapid temperature transitions and stable sub-zero performance without oil migration or freeze-up risks.
• Standard 50 mm diameter feedthrough port (left-side mounted) allows seamless integration of external power, thermocouple leads, or data acquisition lines without compromising chamber integrity.
• Integrated safety architecture includes over-temperature cutoff, compressor high-pressure shutdown, humidity sensor fault detection, and automatic power isolation—each logged with timestamped event codes for audit readiness.

Sample Compatibility & Compliance

The OK-TH series accommodates diverse specimen geometries—from PCB assemblies and battery cells to coated metal coupons and polymer films—within internal volumes ranging from 80 L (OK-TH-80) to 1000 L (OK-TH-1000). All models support standard test fixtures including two-tier SUS#304 adjustable shelves, leveling casters with locking brakes, and floor-level stabilizing feet. The chamber’s thermal and hygrometric uniformity (±0.5 °C / ±2.5 %RH) and stability (±2 °C / +2–3 %RH) have been validated per ISO/IEC 17025-accredited procedures. It satisfies functional compliance with IEC 60068-2-78 (steady-state damp heat), IEC 60068-2-30 (cyclic damp heat), and USP environmental stress qualification requirements for stability-indicating methods. Optional validation packages include IQ/OQ documentation templates compatible with GLP and GMP environments.

Software & Data Management

Controller firmware supports USB data export (CSV format) of time-stamped temperature/humidity logs, setpoint histories, and alarm events. While no proprietary PC software is bundled, the unit’s RS485 Modbus RTU interface enables integration into centralized LabVantage, Siemens Desigo, or custom SCADA systems for enterprise-wide environmental monitoring. Audit trail functionality records all parameter changes, user logins, and calibration interventions—meeting FDA 21 CFR Part 11 requirements when deployed with appropriate access controls and electronic signature workflows. Remote monitoring via optional Ethernet module (not included) permits secure HTTP-based status checks and email alerting for out-of-spec conditions.

Applications

• Accelerated aging of lithium-ion battery modules under combined thermal cycling and humidity soak conditions.
• Qualification testing of automotive ECUs per ISO 16750-4 (climate resistance) and SAE J2380 (humidity durability).
• Stability assessment of medical device packaging per ISO 11607-1, including peel strength retention after 95 %RH/40 °C exposure.
• Material compatibility screening for conformal coatings used in avionics enclosures subjected to MIL-STD-810H Method 507.6.
• Validation of accelerated corrosion test chambers requiring precise RH ramping between 30–95 %RH at fixed temperatures.
• Pre-conditioning of reference standards prior to mechanical property measurement per ASTM D618.

FAQ

What is the standard warranty coverage for the OK-TH chamber?
The unit carries a 12-month parts-and-labor warranty from date of commissioning, inclusive of controller electronics, refrigeration components, and structural welds.
Can the chamber be calibrated to NIST-traceable standards?
Yes—third-party accredited calibration services (including as-found/as-left reports) are available upon request; field calibration ports accommodate Class A PT100 probes.
Is remote firmware update supported?
Firmware updates require local USB drive upload; no over-the-air (OTA) capability is provided due to industrial cybersecurity policy alignment.
Does the controller support user-defined test profiles with dwell, ramp, and loop functions?
Yes—the touchscreen interface allows creation of up to 128-step programs with variable ramp rates, hold durations, and conditional branching based on sensor feedback.
Are custom interior dimensions or additional ports available?
Custom engineering is offered for OEM integration; non-standard dimensions, extra feedthroughs, or specialized shelving require formal RFQ submission with mechanical drawings.