OK Instruments OK-TH-100.00 Benchtop Temperature and Humidity Controlled Chamber

Overview

The OK Instruments OK-TH-100.00 is a compact, benchtop temperature and humidity controlled chamber engineered for precise environmental simulation in quality control, materials reliability testing, and accelerated aging studies. It operates on the principle of closed-loop PID-controlled thermoelectric and refrigerant-based conditioning—utilizing an air-cooled, hermetically sealed dual-stage compressor system with environmentally compliant R404A/R23 refrigerant blend. Designed to replicate real-world climatic stressors—including sustained high-temperature dry heat, prolonged humid exposure, and cyclic thermal-hygrometric transitions—the chamber supports deterministic evaluation of product integrity, dimensional stability, coating adhesion, electrical insulation performance, and polymer degradation kinetics under standardized environmental loads.

Key Features

• Microprocessor-based color touch-screen controller with intuitive bilingual (English/Chinese) interface and real-time graphical display of setpoints, actual values, and trend curves
• Benchtop footprint optimized for limited laboratory space; stainless steel SUS#304 interior and exterior construction ensures corrosion resistance, cleanability, and long-term dimensional stability
• Double-layer high-tension silicone rubber door gasket provides leak-tight sealing across full operating range, minimizing humidity loss and thermal drift
• Multi-layer laminated tempered observation window with embedded conductive film enables unobstructed visual monitoring without condensation or electrostatic interference
• Standard 50 mm diameter test port on left side wall, fitted with removable rubber plug—compatible with external power feeds, sensor leads, or data acquisition cables
• Integrated safety architecture includes over-temperature cutoff, compressor high-pressure protection, phase failure detection, and real-time fault logging with audible/visual alerts
• Adjustable stainless steel shelf (2 pcs), leveling casters (4 pcs), and locking leveling feet ensure stable positioning and ergonomic sample loading

Sample Compatibility & Compliance

The OK-TH-100.00 accommodates samples up to 500 × 500 × 400 mm (W × H × D) within its working volume, making it suitable for PCB assemblies, small electronic enclosures, polymer specimens, coated metal coupons, pharmaceutical packaging, and automotive sensors. Its performance aligns with core international environmental test standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (steady-state damp heat), and IEC 60068-2-30 (cyclic damp heat). It further satisfies Chinese national standards GB/T 2423.1–2001, GB/T 2423.2–2001, and GB/T 2423.4–1993, as well as military standard GJB 150.3–1986 and GJB 150.4–1986. While not inherently 21 CFR Part 11-compliant, its controller supports audit-ready event logging when integrated with validated external data management systems under GLP/GMP frameworks.

Software & Data Management

The embedded controller records time-stamped temperature and humidity profiles at user-defined intervals (default: 1 min), storing up to 100 test programs and 30 days of continuous data locally. USB export enables CSV-formatted traceability for post-test analysis in Excel, MATLAB, or LIMS platforms. Optional RS485 Modbus RTU communication allows integration into centralized facility monitoring systems. All setpoint changes, alarm triggers, and operational events are timestamped and retained in non-volatile memory—supporting basic traceability requirements for internal QA audits. For regulated environments, third-party validation packages (IQ/OQ/PQ) and calibration certificates per ISO/IEC 17025 are available upon request.

Applications

• Accelerated life testing of consumer electronics components under combined thermal and hygric stress
• Evaluation of paint, adhesive, and conformal coating durability per ASTM D2247 and ISO 6270
• Stability assessment of medical device packaging per ISO 11607-1
• Pre-conditioning of lithium-ion battery cells prior to electrical cycling tests
• Environmental screening of aerospace connectors and avionics modules per DO-160 Section 4 & 5
• Material coefficient of thermal expansion (CTE) and moisture absorption coefficient (MAC) characterization
• Validation of HVAC filter media performance under elevated humidity load

FAQ

What is the minimum operating temperature of the OK-TH-100.00?

The standard configuration supports a lower limit of +40 °C. Sub-zero variants (e.g., –20 °C or –40 °C) are available as custom configurations—contact technical support for specification review and lead-time confirmation.
Can this chamber perform temperature-humidity cycling per IEC 60068-2-30?

Yes—its programmable controller supports multi-step ramp-soak cycles with synchronized temperature and humidity transitions, meeting the timing and tolerance requirements of Test Db (cyclic damp heat). Cycle definition requires manual setup via the touch interface or USB upload.
Is the 50 mm test port sealed during operation?

Yes—the port includes a removable silicone rubber plug rated for full-range temperature and humidity retention. When used with external cabling, users must apply supplementary sealing (e.g., cable gland kits) to maintain chamber integrity.
Does the unit include calibration documentation?

Factory calibration data is provided with each shipment. NIST-traceable calibration certificates and annual recalibration services are available as optional add-ons.
What power supply is required for installation?

The OK-TH-100.00 requires a dedicated 3-phase, 5-wire AC380 V ±5 %, 50 Hz ±0.5 Hz supply. A 2.5-meter power cord is included; hardwiring is recommended for permanent installations.