Other Brands OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH Series Temperature and Humidity Controlled Environmental Test Chambers are engineered for precision simulation of climatic conditions in laboratory and industrial quality assurance environments. These chambers operate on a dual-loop control architecture—separate proportional-integral-derivative (PID) algorithms govern temperature and humidity regulation—to ensure stable, repeatable exposure profiles across extended test durations. The system employs forced-air convection with optimized airflow distribution to maintain uniform thermal and hygroscopic conditions throughout the working volume, as verified by ISO 16750-4 and IEC 60068-3-5 calibration protocols. Designed for compliance-driven testing workflows, the OK-TH series supports both steady-state (constant) and cyclic (alternating) environmental stress profiles, making it suitable for accelerated aging, reliability validation, and pre-compliance screening per military, automotive, and electronics standards.

Key Features

• Modular chamber configurations spanning 80 L to 1000 L internal volume—scalable to accommodate prototype assemblies, PCBs, enclosures, or small subsystems.
• Four-tier temperature range options: 0–150 °C, –20–150 °C, –40–150 °C, and –70–150 °C—achieved via cascade refrigeration with R404A (high-stage) and R23 (low-stage) refrigerants, meeting EPA SNAP and EU F-Gas Regulation requirements.
• Humidity generation via steam injection with PID-controlled saturation vessel; dehumidification through surface condensation on chilled evaporator coils—enabling precise RH setpoint control from 20 %RH to 98 %RH (with optional extension to 5 %RH).
• SUS#304 stainless steel construction—fully welded interior cavity, non-porous surfaces, and corrosion-resistant hardware—for long-term stability under high-humidity and saline fog test conditions.
• Intuitive 7-inch TFT-LCD touch controller with real-time trend graphs, multi-segment programmability (up to 99 cycles × 99 steps), data logging (internal SD card + USB export), and configurable alarm thresholds (deviation, sensor fault, door open).
• Integrated mechanical safety systems: over-temperature cutoff, refrigerant pressure monitoring, phase-loss protection, and independent humidity over-saturation lockout.

Sample Compatibility & Compliance

The OK-TH chambers accommodate diverse sample geometries through customizable internal dimensions and standard accessories—including removable shelves, a 50 mm diameter cable port with silicone gasket, and load-rated casters with locking leveling feet. All models meet structural and operational requirements for test method execution under MIL-STD-810G (via Chinese national adaptation GJB150.3–150.4), IEC 60068-2-1 (cold), -2-2 (dry heat), -2-30 (cyclic damp heat), and -2-78 (steady-state damp heat). Chamber performance is validated per IEC 60068-3-5 (methods for determining uniformity and stability), with documented traceability to NIST-traceable reference sensors. Optional qualification packages include IQ/OQ documentation templates aligned with GLP and ISO/IEC 17025 laboratory accreditation frameworks.

Software & Data Management

While the embedded controller provides standalone operation, optional PC-based software (OK-Link™) enables remote monitoring, script-based test sequencing, automated report generation (PDF/CSV), and audit-trail-enabled user access control. Data logs include timestamped temperature/humidity readings, setpoint deviations, alarm events, and system status flags—structured to support FDA 21 CFR Part 11 compliance when paired with electronic signature modules and role-based permissions. Raw data export adheres to ASTM E2500-18 Annex A3 formatting conventions for regulatory submissions.

Applications

• Environmental stress screening (ESS) of electronic components, automotive ECUs, and aerospace avionics per JEDEC JESD22-A104 and A110.
• Material stability assessment for pharmaceutical packaging, medical device housings, and polymer composites under ISO 11607-1 accelerated aging protocols.
• Pre-conditioning of sensors, batteries, and optoelectronic modules prior to functional testing or EMC evaluation.
• Validation of sealing integrity and condensation resistance in IP-rated enclosures (IEC 60529) and MIL-DTL-38999 connector assemblies.
• Research-grade climate simulation for material science labs investigating hygrothermal degradation kinetics in composites and coatings.

FAQ

Is this chamber certified to IEC 60068-2-30 for cyclic damp heat testing?
Yes—the OK-TH series is configured and factory-validated to execute IEC 60068-2-30 Test Db (cyclic damp heat) with programmable ramp rates, dwell periods, and transition tolerances per Clause 6.2.

Can the controller interface be operated exclusively in English?
Yes—the touch-screen controller supports full English-language UI localization, including menus, error messages, and report headers, with no Chinese text displayed unless manually selected.

What is the maximum allowable load weight per shelf?
Each SUS#304 shelf is rated for 15 kg uniformly distributed load; total chamber payload capacity is specified per model in the technical datasheet (e.g., OK-TH-408: 45 kg max).

Do you provide installation and commissioning support?
Standard delivery includes mechanical installation guidance and on-site operational verification. Full IQ/OQ services, including third-party metrology certification and GMP-aligned documentation, are available as optional add-ons.

Are spare parts and calibration services available internationally?
Yes—critical spares (humidity sensors, PID controllers, refrigerant filters) are stocked regionally; NIST-traceable calibration certificates and preventive maintenance contracts are offered globally through authorized service partners.