DRETOP CRH-1000 Environmental Chamber (Constant Temperature & Humidity Test Chamber)

Overview

The DRETOP CRH-1000 Environmental Chamber is an engineered solution for precise, repeatable simulation of temperature and humidity stress conditions in laboratory and industrial quality assurance environments. Based on dual-loop PID-controlled refrigeration and steam humidification principles, the chamber maintains stable thermal-hygric profiles across its full operational range—enabling accelerated aging, environmental stress screening (ESS), and reliability validation per IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-30, and ISO 16750-4 standards. Its 1000 L nominal volume and modular architecture support both component-level qualification (e.g., PCBs, ICs, MEMS sensors) and system-level testing (e.g., automotive ECUs, medical imaging subsystems, battery modules), making it suitable for R&D labs, QC departments, and third-party certification facilities operating under GLP or ISO/IEC 17025 frameworks.

Key Features

• Robust chamber construction featuring a seamless AISI 304 stainless steel inner liner with mirror-polished surface—resistant to corrosion, non-porous, and compliant with pharmaceutical and food-grade cleaning protocols.
• Dual-layer insulation using high-density polyurethane foam (≥120 mm thickness) minimizes thermal bridging and reduces external surface condensation, achieving ≤0.5 K surface temperature differential under full-load operation at 65 °C/95 %RH.
• High-fidelity control system with color TFT touchscreen interface, supporting up to 100 programmable segments with ramp-soak logic, real-time trend logging, and timestamped event recording.
• Optimized observation capability via double-glazed, low-emissivity tempered glass viewport with integrated anti-fog heating circuit—ensuring unobstructed visual monitoring during sub-zero or high-humidity cycles.
• Standard Ø25 mm test port located on the right lateral wall, pre-sealed with silicone grommet; configurable for signal cabling, power feedthrough, or gas purging—compatible with external data loggers, load cells, or optical measurement systems.
• Compressor-based cooling system utilizing a branded hermetic scroll compressor and copper-aluminum finned condenser, delivering stable sub-ambient capability down to 0 °C with acoustic noise <62 dB(A) at 1 m distance.

Sample Compatibility & Compliance

The CRH-1000 accommodates diverse sample geometries—from miniature surface-mount devices mounted on test boards to fully assembled electronic enclosures (max. 800 mm H × 450 mm W × 400 mm D). Four adjustable stainless steel shelves (load capacity: 15 kg/shelf, uniformly distributed) provide vertical flexibility. The chamber meets electromagnetic compatibility requirements per EN 61326-1 and safety standards per EN 61010-1. All firmware and controller logs comply with ALCOA+ data integrity principles; optional audit trail and electronic signature modules satisfy FDA 21 CFR Part 11 requirements for regulated industries.

Software & Data Management

Onboard controller firmware supports CSV export via USB 2.0 port, with time-stamped temperature/humidity readings recorded at user-defined intervals (1 s to 60 min). Optional Ethernet or RS485 communication enables integration into centralized LabVantage or TrackWise LIMS platforms. Remote access functionality permits real-time parameter adjustment, alarm acknowledgment, and historical data retrieval via secure HTTPS interface—configured to align with enterprise IT security policies including TLS 1.2 encryption and role-based user authentication.

Applications

• Thermal cycling and damp heat testing of printed circuit assemblies per JESD22-A104 and A110.
• Accelerated life testing of lithium-ion battery packs under combined thermal-hygric stress (e.g., 40 °C/90 %RH for 1000 h).
• Stability assessment of sterile medical device packaging per ISO 11607-1.
• Material compatibility evaluation of adhesives, conformal coatings, and elastomeric seals used in aerospace avionics.
• Validation of environmental resilience for IoT edge sensors deployed in tropical or desert climates.
• Process qualification of polymer extrusion or coating drying steps requiring controlled ambient conditioning.

FAQ

What is the maximum allowable sample weight inside the CRH-1000 chamber?

The total payload must not exceed 60 kg, distributed evenly across four shelves (≤15 kg per shelf) to maintain airflow uniformity and thermal stability.
Does the CRH-1000 support ramp-and-soak profiling with humidity modulation?

Yes—the controller allows independent programming of temperature and relative humidity setpoints across up to 100 sequential segments, including linear ramps, dwell periods, and conditional triggers.
Is calibration documentation provided with shipment?

Each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China), covering temperature (at 25 °C, 40 °C, 60 °C) and humidity (at 30 %RH, 65 %RH, 90 %RH) reference points.
Can the chamber be integrated into a building management system (BMS)?

Via optional Modbus RTU or BACnet MS/TP protocol modules, enabling status reporting, fault alerts, and setpoint synchronization with facility-wide HVAC infrastructure.
What maintenance intervals are recommended for long-term reliability?

Compressor oil and refrigerant levels should be verified annually; humidifier tank and water inlet filter require quarterly cleaning; sensor verification is advised every six months using NIST-traceable reference hygrometers and dry-well calibrators.