DRETOP DRH-100CL Temperature and Humidity Controlled Chamber
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DRH-100CL |
| Instrument Type | Benchtop |
| Cooling Method | Air-Cooled |
| Temperature Range | −10 °C to +65 °C |
| Humidity Range | 20–95 %RH |
| Temperature Uniformity | ±0.5 °C |
| Humidity Deviation | ±3 %RH |
| Interior Dimensions (W×D×H) | 450 mm × 380 mm × 590 mm |
Overview
The DRETOP DRH-100CL Temperature and Humidity Controlled Chamber is a benchtop environmental test system engineered for precision stability testing, long-term storage simulation, and accelerated aging studies under controlled thermal and hygrometric conditions. It operates on the principle of dual-loop PID-controlled refrigeration and steam-based humidification, enabling reproducible generation of defined climate profiles—including low-humidity cold environments (−10 °C / 20 %RH), high-humidity elevated temperatures (+65 °C / 95 %RH), and dynamic cycling sequences such as temperature-humidity ramping, condensation simulation, and dry-to-wet transitions. Its design addresses critical reliability validation requirements across electronics, automotive components, pharmaceutical packaging, polymer materials, and food stability protocols—particularly where electrostatic discharge (ESD) sensitivity at low RH (<30 %RH) or moisture-induced degradation must be quantified per IEC 60068-2-30, ASTM D4332, or ISO 188.
Key Features
- Mirror-finish stainless steel interior with radius-corner construction for seamless cleaning and corrosion resistance; adjustable shelf spacing supports flexible sample arrangement.
- Dual-door configuration: outer magnetic door seal with nano-composite gasket and inner tempered glass viewing window—enabling full-field visual monitoring without thermal disturbance or humidity loss.
- Integrated top-mounted automatic water reservoir with external refill port; eliminates manual refilling during extended tests and maintains consistent feed pressure for uniform humidification.
- 25 mm diameter access port on left side wall—compatible with external sensors, thermocouples, or data loggers while preserving chamber integrity.
- 7-inch color TFT touchscreen controller with bilingual (English/Chinese) interface; supports up to 30 programmable segments with ramp/soak logic, real-time trend display, and event logging.
- Air-cooled refrigeration system using R134a-free eco-friendly refrigerant (R600a); paired with high-efficiency scroll compressor and axial circulation fan for low noise (<55 dB(A)) and stable thermal distribution.
- Comprehensive safety architecture: independent overtemperature cut-off, compressor overcurrent/overheat protection, fan failure detection, low-water alarm, and power-loss recovery with parameter retention.
Sample Compatibility & Compliance
The DRH-100CL accommodates diverse sample geometries up to 100 L internal volume (450 × 380 × 590 mm), supporting standard petri dishes, PCB trays, sealed vials, packaged medical devices, and small mechanical assemblies. Its performance conforms to key international test standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (damp heat, steady state), and ISO 4892-2 (plastics exposure). For regulated industries, the system supports audit-ready operation through optional RS485 Modbus RTU connectivity—enabling integration into LIMS or SCADA platforms compliant with FDA 21 CFR Part 11 when paired with validated software and electronic signature workflows. All control firmware includes timestamped event logs with user-accessible audit trails for GLP/GMP-aligned documentation.
Software & Data Management
Local operation is managed via embedded controller firmware supporting CSV export of time-stamped temperature/humidity records directly to USB drive. Optional PC-based software (DRETOP EnviroLink™) provides remote programming, multi-chamber synchronization, real-time graphing, deviation alerts, and automated report generation (PDF/Excel). Data integrity safeguards include write-protected memory, cyclic redundancy check (CRC) validation on stored logs, and configurable alarm escalation—via email or optional GSM SMS module (SIM card not included). The system does not require cloud dependency; all data remains on-premise unless explicitly exported by the user.
Applications
- Electronics reliability testing: ESD susceptibility assessment at low-RH conditions (e.g., semiconductor storage at 25 °C / 20 %RH), solder joint fatigue under thermal cycling, conformal coating adhesion under damp heat.
- Pharmaceutical stability: ICH Q1A(R2) long-term and accelerated storage condition simulation (e.g., 25 °C / 60 %RH, 30 °C / 65 %RH), packaging permeability evaluation, lyophilized product reconstitution behavior.
- Polymer and elastomer aging: oxidation kinetics under elevated humidity, dimensional stability of composites, vulcanization reversal in rubber compounds.
- Food and agricultural science: shelf-life modeling of dried foods, mold growth inhibition thresholds, seed germination rate dependence on vapor pressure deficit.
- Automotive component validation: dashboard material cracking under low-RH freeze-thaw cycles, adhesive bond strength retention in humid tropical environments.
FAQ
What is the maximum allowable ambient operating temperature for the DRH-100CL?
The unit is rated for installation in rooms maintained at ≤30 °C and ≤70 %RH non-condensing ambient conditions to ensure compressor efficiency and condensate management.
Does the chamber support continuous unattended operation for 30 days or longer?
Yes—provided water reservoir capacity is augmented via external supply line (optional accessory), and power continuity is ensured via UPS or generator backup. Internal logging retains 30 days of 1-minute interval data.
Can the DRH-100CL achieve and hold 10 %RH?
No—the specified lower limit is 20 %RH. Achieving sub-20 %RH requires desiccant-based or nitrogen-purge systems beyond this model’s steam-humidification architecture.
Is calibration certificate traceable to NIST or CNAS available?
Factory calibration reports are provided with each unit. Third-party accredited calibration (CNAS or equivalent) is available upon request prior to shipment, with documented uncertainty budgets per ISO/IEC 17025.
How is defrosting managed during low-temperature operation?
The system employs adaptive demand-based defrost: frost accumulation on evaporator coils triggers automatic heater activation only when sensor thresholds are exceeded—eliminating fixed-interval energy waste and maintaining setpoint fidelity.
