DRETOP DW-500CL Low-Temperature Incubator Chamber

Overview

The DRETOP DW-500CL Low-Temperature Incubator Chamber is a precision-engineered environmental test chamber designed for controlled-temperature applications in research laboratories, quality control environments, and industrial R&D settings. Unlike general-purpose refrigerated storage units, this chamber integrates active temperature regulation with incubation-grade stability—enabling both low-temperature preservation and dynamic thermal conditioning of biological, chemical, and material samples. It operates on a forced-air convection principle, utilizing a high-efficiency scroll compressor and environmentally compliant R134a refrigerant (CFC-free), ensuring consistent thermal performance across its full operating range of −10 °C to +65 °C. The chamber’s architecture supports ISO/IEC 17025-aligned validation protocols and meets foundational requirements for GLP-compliant sample conditioning, microbial growth studies, pharmaceutical stability testing (per ICH Q1A–Q1E), and electronic component cold-soak evaluation.

Key Features

• Microprocessor-based P.I.D. temperature controller with 0.1 °C resolution and real-time digital display; supports programmable ramp-hold profiles and user-defined alarm thresholds.
• Reinforced cold-rolled steel exterior with stainless-steel interior chamber (304 grade), fully weld-seamed and electropolished for corrosion resistance and cleanability.
• Four-point arc-edge door sealing system and magnetic gasket ensure minimal thermal leakage; integrated anti-fog heated observation window (standard) prevents condensation during sub-zero operation.
• Modular refrigeration assembly with built-in compressor protection logic—including start-up delay, inter-cycle cooling intervals, and automatic fault recovery—to extend service life and ensure long-term reliability.
• Adjustable stainless-steel shelving (3 removable trays included); optimized internal airflow via tangential blower and rear-mounted air ducts ensures ≤±0.5 °C uniformity throughout the 500 L working volume (W×D×H: 700×700×1020 mm).
• Security-enhanced access control with keyed mechanical lock; optional RS485 interface enables integration into centralized lab monitoring systems (e.g., LabVantage, Thermo Fisher SampleManager) for audit-trail-capable data logging.

Sample Compatibility & Compliance

The DW-500CL accommodates diverse sample types including culture media, lyophilized reagents, polymer specimens, PCB assemblies, and calibration standards. Its temperature stability profile satisfies ASTM E2234 (Standard Practice for Qualification of Environmental Chambers), ISO 17025 clause 5.4.2 (Equipment Verification), and USP <1151> requirements for environmental control in pharmaceutical development. While not certified for IEC 61000-4-2 ESD immunity or ATEX zones, it complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD) and RoHS 2011/65/EU material restrictions. For GxP environments, optional firmware upgrades support 21 CFR Part 11-compliant electronic signatures and audit trail generation when paired with validated third-party software.

Software & Data Management

The embedded controller stores up to 10 user-defined programs (each with 8 segments) and retains parameter history for ≥30 days without external power (via non-volatile memory). Optional RS485 serial communication allows bidirectional command exchange using Modbus RTU protocol. When connected to a host PC running DRETOP’s optional LogView Pro software (v3.2+), users gain access to real-time graphing, automated report generation (PDF/CSV), and configurable email/SMS alerts for out-of-spec events. All logged data includes timestamp, setpoint, actual reading, and alarm status—structured to meet ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for regulatory submissions.

Applications

• Low-temperature microbial incubation (e.g., psychrophilic strain propagation at 4–10 °C)
• Accelerated stability testing of APIs and finished dosage forms per ICH guidelines
• Pre-conditioning of lithium-ion battery cells prior to electrochemical cycling
• Thermal aging of elastomers, adhesives, and composite laminates (ASTM D573, ISO 188)
• Environmental stress screening (ESS) of aerospace-grade electronics under controlled cold soak
• Storage and equilibration of reference standards used in metrology labs (e.g., NIST-traceable thermistors)

FAQ

What is the minimum achievable temperature with sustained stability?
The chamber maintains −10 °C with ≤±0.5 °C fluctuation under standard ambient conditions (25 °C, 50% RH) and no internal heat load.
Can the unit be validated for IQ/OQ/PQ protocols?
Yes—DRETOP provides a Factory Acceptance Test (FAT) report and supports qualification with calibrated PT100 probes traceable to NIM (National Institute of Metrology, China); full validation documentation templates are available upon request.
Is remote monitoring supported natively?
Native Ethernet or Wi-Fi is not integrated; however, RS485-to-Ethernet gateways (e.g., Moxa EDS-205A) enable networked supervision when deployed with compatible SCADA platforms.
Does the chamber comply with FDA 21 CFR Part 11 for electronic records?
The base controller does not include Part 11 features; compliance requires installation of validated third-party software with role-based access control, electronic signature, and immutable audit trails.
What maintenance intervals are recommended?
Compressor oil and refrigerant charge require verification every 24 months; air filter cleaning is advised quarterly; door gasket integrity should be inspected biannually per ISO 13485 Annex B recommendations.