OK Instrument OK-TH-150 Programmable Temperature and Humidity Chamber

Overview

The OK Instrument OK-TH-150 is a benchtop programmable temperature and humidity chamber engineered for precision environmental simulation in laboratory and quality assurance settings. It operates on the principle of active thermodynamic control—integrating vapor-compression refrigeration, resistive heating, steam-based humidification, and mechanical dehumidification—to establish and maintain stable, repeatable climatic conditions across defined operational envelopes. Designed for compliance-critical testing workflows, the chamber delivers traceable, reproducible environmental profiles required for accelerated reliability assessment, stability studies, and qualification per international product standards. Its compact footprint and air-cooled architecture make it suitable for integration into controlled laboratory spaces without dedicated utility infrastructure.

Key Features

• Integrated dual-loop PID + PLC + fuzzy logic control system ensures dynamic compensation for thermal mass, load variation, and ambient drift—enabling high-fidelity replication of complex multi-step test profiles.
• Touchscreen controller with multilingual interface (English/Chinese), real-time graphical display of temperature/humidity trajectories, and built-in data logging with timestamped event markers.
• Robust chamber construction: interior chamber fabricated from electropolished SUS304 stainless steel; exterior housing finished with corrosion-resistant powder-coated steel; triple-layer vacuum-insulated observation window for non-intrusive monitoring.
• Comprehensive safety architecture including overtemperature cut-off, low-humidity shutoff, compressor overload protection, phase-loss detection, and auto-restart functionality following power interruption—with seamless program resumption from last valid segment.
• Low-noise operation (<65 dB(A) at 1 m), compliant with ISO 7730 and ISO 10534-2 acoustic requirements for laboratory environments.

Sample Compatibility & Compliance

The OK-TH-150 accommodates samples up to 50 L volume (500 × 600 × 500 mm internal dimensions), supporting standard test specimens used in electronics packaging, automotive components, pharmaceutical primary packaging, and polymer formulations. Chamber performance conforms to key regulatory and industry benchmarks including GB/T 10592–2008 (General Technical Conditions for Environmental Testing Equipment), GB/T 2423.4–2016 (Test Db: Damp Heat, Cyclic), GJB 150.3A–2009 and GJB 150.4A–2009 (Military Standard Environmental Test Methods), IEC 60068-2-30 (Cyclic Damp Heat), and ISO 16750-4:2010 (Road Vehicles – Environmental Conditions and Testing for Electrical and Electronic Equipment – Climatic Loads). While not certified to UL or CE as a standalone medical device, its design principles align with GLP/GMP environmental monitoring expectations when deployed within validated laboratory systems.

Software & Data Management

Data integrity is maintained through embedded audit-trail-capable firmware that records all parameter changes, alarm events, and runtime status transitions with UTC timestamps. Logged datasets (up to 30 days of continuous 1-min interval recording) are exportable via USB 2.0 interface in CSV format—compatible with common statistical process control (SPC) and LIMS platforms. Optional Ethernet connectivity enables remote monitoring and configuration via HTTP/HTTPS protocols, supporting integration into centralized facility management systems. All stored data retain immutable metadata—including operator ID, test protocol version, and chamber calibration certificate reference—supporting alignment with FDA 21 CFR Part 11 requirements when paired with organizational electronic signature policies.

Applications

• Electronics Reliability: Thermal cycling and damp heat stress testing of PCBAs, connectors, and encapsulated semiconductors per JEDEC JESD22-A104 and A110.
• Automotive Component Validation: Climate endurance evaluation of battery modules, sensors, and infotainment housings under ISO 16750-4-defined temperature/humidity ramps and dwell cycles.
• Pharmaceutical Stability: ICH Q1A(R2)-aligned long-term and accelerated stability trials for drug products and packaging systems, including real-time storage condition simulation (e.g., 25 °C/60 % RH, 30 °C/65 % RH).
• Materials Science: Hygrothermal aging of composites, adhesives, and elastomers to assess dimensional stability, delamination onset, and mechanical property degradation.
• Quality Control Screening: Burn-in and ESS (Environmental Stress Screening) protocols for incoming component lots prior to assembly.

FAQ

What is the maximum sample weight the OK-TH-150 can accommodate without compromising chamber uniformity?
Chamber uniformity specifications assume a maximum load of 15 kg distributed evenly on the standard shelf. For heavier or thermally massive samples, optional perforated stainless-steel trays and auxiliary airflow baffles are available to maintain ≤±2 °C temperature uniformity.
Does the chamber support custom test profile import via external software?
Yes—CSV-formatted step sequences (time, setpoint T, setpoint RH, ramp rate) can be uploaded directly to the controller’s memory using the USB port. Profiles must conform to the internal 120-program × 1200-segment memory architecture.
Is calibration documentation provided with shipment?
Each unit ships with a factory calibration report traceable to NIM (National Institute of Metrology, China), covering temperature (−20 °C to +150 °C) and humidity (20–98 % RH) verification points using NIST-traceable reference sensors.
Can the OK-TH-150 operate continuously for extended stability studies?
Yes—the system is rated for unattended 24/7 operation with scheduled maintenance intervals every 1,000 hours. Continuous operation is supported by redundant safety interlocks and self-diagnostic routines executed at startup and hourly during runtime.