OK-TH Series Programmable Temperature and Humidity Controlled Chamber
| Brand | OK Instrumentation |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Price | USD 2,650 (FOB) |
| Internal Dimensions (W×H×D, cm) | 40×50×40 to 100×100×100 |
| Temperature Range | -70 °C to +150 °C (configurable models) |
| Humidity Range | 5–98 %RH (standard: 20–98 %RH) |
| Temperature Uniformity | ±0.5 °C |
| Humidity Uniformity | ±2.5 %RH |
| Temperature Fluctuation | ±2 °C |
| Humidity Fluctuation | +2–3 %RH |
| Resolution | 0.1 °C / 0.1 %RH |
| Ramp Rate | Heating ~4.0 °C/min |
| Refrigerant | R404A/R23 (ozone-friendly) |
| Construction Material | SUS#304 stainless steel (inner & outer chamber) |
| Control Interface | Color TFT touchscreen controller with English/Chinese language toggle |
| Test Port | One Ø50 mm port (left side) |
| Compliance | MIL-STD-810G, IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), IEC 60068-2-30 (Cyclic Damp Heat), GB/T 2423.1–2001, GB/T 2423.2–2001, GB/T 2423.4–1993, GJB 150.3–1986, GJB 150.4–1986 |
Overview
The OK-TH Series Programmable Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise simulation of climatic stress conditions in laboratory and quality assurance environments. Based on dual-refrigeration circuit architecture and PID-controlled vapor compression thermodynamics, it delivers stable, repeatable control over both temperature (–70 °C to +150 °C) and relative humidity (5–98 %RH) across a range of internal volumes (80 L to 1000 L). Its modular design supports compliance-driven validation workflows in electronics reliability testing, aerospace component qualification, automotive material aging studies, and pharmaceutical stability assessment per ICH Q1 guidelines. The chamber operates under closed-loop feedback using platinum resistance temperature sensors (PT100) and capacitive humidity transducers calibrated traceably to NIST standards.
Key Features
- Full-color 7-inch TFT touchscreen controller with intuitive menu navigation, real-time trend graphing, and dual-language support (English/Chinese)
- SUS#304 stainless steel construction—both interior chamber and exterior housing—for corrosion resistance, cleanroom compatibility, and long-term dimensional stability
- Double-layer high-tensile silicone gasket sealing between door and frame ensures >99.8 % humidity retention and thermal integrity at extreme setpoints
- Multilayer heated observation window with integrated conductive film prevents condensation and enables unobstructed visual monitoring during high-humidity cycles
- Dual-stage refrigeration system utilizing environmentally compliant R404A/R23 mixed refrigerant for rapid thermal response and low-noise operation (<65 dB(A))
- Standard Ø50 mm test port (left-side mounted) with removable rubber plug—compatible with external power feeds, thermocouple leads, or data acquisition cables
- Integrated safety architecture: over-temperature cut-off, compressor high-pressure shutdown, humidity sensor fault detection, and real-time alarm logging with auto-power isolation
Sample Compatibility & Compliance
The OK-TH chamber accommodates diverse sample geometries—from PCB assemblies and polymer films to sealed medical packaging and battery modules—via adjustable stainless-steel shelves and optional custom fixture mounting rails. Its performance meets the stringent spatial uniformity requirements of MIL-STD-810G Method 502.5 (Temperature), IEC 60068-2-30 (Cyclic Damp Heat), and GB/T 2423.4–1993. For regulated industries, the controller supports audit-ready event logging (timestamped alarms, setpoint changes, door openings) and optional 21 CFR Part 11-compliant software add-ons for electronic signature and user access control. All units undergo factory calibration verification against ISO/IEC 17025-accredited reference standards prior to shipment.
Software & Data Management
The embedded controller stores up to 100 programmable test profiles—including ramp-soak-cycle sequences, multi-step humidity transitions, and dwell-based thermal cycling—with 10,000-point internal data logging capacity (time-stamped temperature/humidity readings at user-defined intervals). Optional PC connectivity via RS485 or Ethernet enables remote monitoring, automated report generation (PDF/CSV), and integration into LIMS or MES platforms. Firmware updates are delivered via USB and include version-controlled change logs aligned with IEC 62304 software lifecycle requirements.
Applications
- Accelerated life testing of consumer electronics under combined thermal-hygric stress (e.g., JEDEC JESD22-A104, A110)
- Material compatibility screening for adhesives, coatings, and elastomers per ASTM D471 and ISO 188
- Stability chamber qualification for pharmaceutical intermediates and finished dosage forms (ICH Q5C)
- Environmental stress screening (ESS) of avionics hardware per DO-160 Section 4 and 5
- Validation of moisture barrier performance in flexible packaging per ASTM F1249
- Calibration lab support for hygrometer and thermometer verification under controlled ambient conditions
FAQ
What is the standard warranty coverage for the OK-TH chamber?
All units include a 24-month limited warranty covering parts and labor for defects in materials or workmanship, excluding consumables (e.g., gaskets, filters) and damage from improper installation or misuse.
Can the chamber be validated for GLP/GMP environments?
Yes—documentation packages (IQ/OQ protocols, calibration certificates, and traceability records) are available upon request. Optional IQ/OQ execution services can be coordinated through certified third-party validation partners.
Is remote monitoring supported out-of-the-box?
The base controller includes RS485 Modbus RTU communication. Ethernet-based remote access and cloud telemetry require the optional OK-Link™ gateway module and associated license.
How is temperature and humidity uniformity verified?
Uniformity is measured per IEC 60068-3-5 using nine calibrated PT100 and humidity probes placed at specified locations within the working volume, with results documented in the Factory Acceptance Test (FAT) report.
Are custom internal dimensions or special voltage configurations available?
Yes—custom engineering services include non-standard chamber volumes, 208V/60Hz or 400V/50Hz electrical configurations, explosion-proof variants (ATEX Zone 2), and extended humidity ranges down to 5 %RH.
