DRETOP DRH-150CL Temperature and Humidity Controlled Environmental Test Chamber

Overview

The DRETOP DRH-150CL is a precision-engineered upright temperature and humidity controlled environmental test chamber designed for rigorous physical property evaluation under reproducible climatic conditions. It operates on the principle of integrated refrigeration, resistive heating, and ultrasonic or evaporative humidification—combined with PID-controlled air circulation—to maintain stable, programmable thermal and hygroscopic profiles across its 150 L working volume. Unlike basic incubators or storage cabinets, this chamber supports dynamic environmental stress testing—including temperature cycling, high/low humidity exposure, condensation simulation, and combined thermal-humidity ramping—enabling assessment of material integrity, dimensional stability, coating adhesion, electrical insulation performance, and microbial growth kinetics. Its operational envelope (−10 °C to +65 °C; 20–95 %RH) aligns with key international test standards such as IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat cyclic), and ASTM D4332 (conditioning of plastics). The chamber is routinely deployed in QC laboratories, R&D centers, and regulatory-compliant stability studies (ICH Q1A–Q1E), particularly where long-term exposure data under defined environmental stressors informs shelf-life estimation or failure mode analysis.

Key Features

• Stainless steel mirror-finish interior with radius-corner construction ensures corrosion resistance, ease of decontamination, and uniform airflow distribution.
• Dual-door design: Tempered glass inner door and magnetic outer seal with nano-composite gasket minimize thermal leakage and enable full-field visual monitoring without compromising chamber stability.
• Intelligent control system featuring a color touchscreen interface with bilingual (English/Chinese) navigation, 30-segment programmable logic, and adaptive equilibrium-based temperature/humidity regulation—reducing overshoot and improving setpoint repeatability.
• Integrated air-cooled refrigeration circuit using environmentally compliant non-CFC refrigerant (R134a or equivalent), paired with high-efficiency scroll compressor and low-noise centrifugal circulation fan (≤58 dB(A)).
• Top-mounted auto-refill water reservoir with external access port simplifies maintenance and eliminates manual refilling during extended tests.
• Comprehensive safety architecture including independent over-temperature cut-off, real-time fault diagnostics (compressor overcurrent, fan stall, low-water alarm), acoustic-optic alerting, and power-loss memory retention for uninterrupted protocol execution.

Sample Compatibility & Compliance

The DRH-150CL accommodates a broad spectrum of sample formats—from PCB assemblies and polymer specimens to pharmaceutical packaging, elastomeric seals, food packaging films, and microbiological culture plates—within its adjustable stainless steel shelving system (3 tiers, load-rated up to 15 kg per shelf). Its 25 mm diameter test port (left-side mounted) allows for feedthrough of sensors, thermocouples, or data loggers without breaching chamber integrity. The unit conforms to electromagnetic compatibility (EMC) requirements per EN 61326-1 and meets electrical safety standards per EN 61010-1. While not certified to ISO/IEC 17025 for calibration traceability out-of-the-box, it supports GLP/GMP-aligned workflows through audit-ready event logging, user-access controls, and optional 21 CFR Part 11–compliant software extensions (via third-party integration).

Software & Data Management

Equipped with standard RS485 serial interface, the DRH-150CL enables bidirectional communication with host PCs running Windows-based supervision software. Users can remotely configure multi-step profiles, monitor real-time temperature/humidity traces, export timestamped CSV datasets, and trigger automated start/stop commands. Optional firmware upgrades support Modbus RTU protocol for integration into SCADA or MES platforms. All operational events—including parameter changes, alarm triggers, door openings, and power interruptions—are time-stamped and stored locally for ≥30 days, facilitating root-cause analysis during quality investigations or regulatory audits.

Applications

• Accelerated aging and stability testing of medical devices, active pharmaceutical ingredients (APIs), and finished dosage forms per ICH guidelines.
• Environmental stress screening (ESS) of electronic components and assemblies to identify latent defects induced by thermal cycling or moisture ingress.
• Evaluation of hygroscopic expansion, warpage, or delamination in composite materials, laminates, and printed circuit boards.
• Controlled conditioning of rubber, plastic, and textile specimens prior to tensile, hardness, or abrasion testing (per ASTM D618, ISO 291).
• Bacterial and fungal culture incubation under precisely regulated low-humidity or condensing conditions for bioburden studies.
• Validation of packaging barrier performance against moisture vapor transmission rate (MVTR) under variable climate loads.

FAQ

What is the chamber’s temperature recovery time after door opening?
Typical recovery to ±0.5 °C of setpoint within 8–12 minutes (tested at 25 °C/50 %RH ambient, 15-second door opening).
Can the DRH-150CL operate continuously at 65 °C and 95 %RH?
Yes—its dual-mode humidification system and reinforced insulation allow sustained operation across the full specified range.
Is external water supply required?
No—integrated reservoir supports >72 hours of unattended operation at 80 %RH; optional continuous-feed kit available.
Does the controller support password-protected parameter locking?
Yes—three-tier user access (Operator, Technician, Administrator) with configurable permissions and change logs.
Are calibration certificates provided with shipment?
Factory calibration verification is included; NIST-traceable certification is available upon request (additional lead time and fee apply).