Generic Brand OK-TH Series Touchscreen-Controlled Environmental Test Chamber for Temperature and Humidity Cycling

Overview

The OK-TH Series Touchscreen-Controlled Environmental Test Chamber is an industrial-grade temperature and humidity cycling system engineered for precise simulation of real-world environmental stress conditions. Based on the principles of forced-air convection, refrigerant-based vapor compression cooling, and steam-humidification or solid-state dehumidification, this chamber delivers repeatable thermal and hygrothermal profiles across a wide operational envelope—from extreme sub-zero cold (-70 °C) to high-temperature bake (+150 °C), combined with controlled relative humidity (20–98 %RH). Designed for compliance-driven testing environments, it supports standardized environmental qualification protocols required in electronics reliability, aerospace component validation, automotive ECU endurance assessment, and materials science research. Its robust architecture integrates dual-stage refrigeration, high-efficiency air circulation, and PID-controlled humidification to maintain stable chamber conditions under dynamic load conditions.

Key Features

• Full-color capacitive touchscreen controller with intuitive GUI, supporting seamless English/Chinese language switching and real-time graphical display of setpoints, actual values, and trend curves.
• Double-layer high-tensile silicone rubber door gasket ensures leak-tight sealing at all operating temperatures, minimizing humidity loss and thermal leakage during low-temperature operation.
• SUS#304 stainless steel interior and exterior construction provides corrosion resistance, non-outgassing performance, and long-term dimensional stability—critical for cleanroom-adjacent or high-salinity test environments.
• Multi-layer insulated observation window with embedded indium tin oxide (ITO) conductive film prevents condensation and enables unobstructed visual monitoring without compromising thermal integrity.
• Dual-refrigerant system (R404A primary stage + R23 cascade stage for ultra-low models) enables rapid cooling down to -70 °C while maintaining low acoustic emission (<65 dB(A)) for laboratory integration.
• Integrated safety architecture includes over-temperature cut-off, compressor high-pressure shutdown, humidity sensor fault detection, and real-time alarm logging with automatic power disconnection upon critical fault detection.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad range of sample geometries via customizable internal dimensions (from 80 L to 1000 L volume) and standard Ø50 mm cable/port access. Its design conforms to international environmental test standards including MIL-STD-810G Method 502.6 (low temperature), Method 501.6 (high temperature), Method 507.6 (humidity), and IEC 60068-2 series (e.g., IEC 60068-2-1: Cold, IEC 60068-2-2: Dry Heat, IEC 60068-2-78: Damp Heat, Steady State, IEC 60068-2-30: Damp Heat, Cycling). It is routinely deployed in laboratories conducting GLP-compliant qualification per ISO/IEC 17025 requirements, and its control firmware supports audit-ready event logging compatible with FDA 21 CFR Part 11–aligned data integrity practices when integrated with validated external software platforms.

Software & Data Management

The embedded controller supports USB export of time-stamped CSV logs (temperature, humidity, alarms, setpoint changes) with configurable sampling intervals (1 s to 60 min). Optional Ethernet or RS485 interfaces enable remote monitoring and integration into centralized lab management systems (LIMS) or MES platforms. While the base unit does not include proprietary PC software, its MODBUS RTU protocol implementation allows interoperability with third-party SCADA tools (e.g., LabVIEW, Ignition, WinCC) for automated test sequencing, statistical process control (SPC) charting, and deviation reporting. All parameter configurations are password-protected and retain settings after power interruption.

Applications

This chamber serves as a core tool in product development and quality assurance workflows across multiple sectors: accelerated life testing of PCBAs and conformally coated assemblies; thermal shock evaluation of polymer encapsulants and adhesives; validation of battery thermal management systems under combined thermal-hygric stress; pre-conditioning of optical components prior to spectral measurement; and verification of packaging barrier performance against moisture ingress. Its uniformity specifications (±0.5 °C, ±2.5 %RH) meet minimum acceptance criteria for Class II environmental chambers per IEC 60068-3-5 and support comparative analysis between batches under identical climatic exposure profiles.

FAQ

What temperature and humidity ranges are available across model variants?

Standard configurations offer four temperature base ranges: 0–150 °C (Model A), -20–150 °C (B), -40–150 °C (C), and -70–150 °C (D); humidity is standard 20–98 %RH, with optional extended ranges of 5–98 %RH or 10–98 %RH.

Is the chamber suitable for continuous operation in a certified cleanroom?

Yes—the SUS#304 construction, zero-oil compressor design, and absence of volatile organic coatings make it compatible with ISO Class 7 (10,000) cleanroom environments when installed with appropriate HVAC isolation and filtered air supply.

Can test profiles be programmed and recalled without PC connectivity?

Yes—the touchscreen interface supports up to 100 programmable multi-step cycles, each with independent ramp rates, dwell times, and humidity/temperature targets; profiles are stored in non-volatile memory.

Does the unit comply with electromagnetic compatibility (EMC) directives for CE marking?

All units are manufactured to meet EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) requirements for industrial environments, and carry CE marking per the EU Machinery Directive 2006/42/EC.

What maintenance intervals are recommended for long-term calibration stability?

We recommend annual verification of temperature/humidity sensors using NIST-traceable reference standards, biannual inspection of refrigerant charge and condensate drain lines, and quarterly cleaning of air intake filters and evaporator coils.