DRETOP DW-300CL Low Temperature Incubator

Overview

The DRETOP DW-300CL Low Temperature Incubator is an engineered environmental control system designed for precise, stable, and reproducible temperature regulation across a wide operational range of –10 °C to +65 °C. Unlike standard ambient or refrigerated storage units, this incubator integrates air-jacketed heating and compressor-based refrigeration into a single robust thermal management architecture—enabling bidirectional active temperature control without reliance on external chillers or auxiliary heating elements. Its design adheres to fundamental principles of convective heat transfer optimization: a high-efficiency axial-flow fan system, combined with internally optimized airflow channels, ensures uniform air circulation throughout the 300 L stainless-steel chamber. This configuration supports applications demanding tight thermal stability—including microbial culture under sub-ambient conditions, long-term stability testing of pharmaceutical excipients, low-temperature material characterization, and controlled-environment storage of sensitive reagents and biological matrices. The unit meets essential mechanical and electrical safety requirements per IEC 61010-1 and is constructed to support GLP-compliant laboratory workflows where traceability, parameter retention, and operational continuity are critical.

Key Features

• Microprocessor-controlled P.I.D. temperature regulation with 0.1 °C resolution and ±0.5 °C fluctuation tolerance—engineered for high reproducibility in extended-duration experiments.
• Air-jacketed heating system coupled with a high-reliability hermetic compressor provides rapid thermal response and consistent dual-mode operation across the full temperature span.
• Stainless-steel interior chamber (304 grade) with fully removable, height-adjustable shelves—facilitating thorough cleaning, autoclave-compatible decontamination, and flexible sample layout.
• Embedded anti-fog observation window with integrated resistive heating—eliminates condensation during low-temperature operation and maintains optical clarity without compromising thermal integrity.
• Lockable key-operated door and caster-mounted chassis with independent leveling feet and brake-locked swivel casters—ensuring both physical security and ergonomic mobility in shared lab environments.
• Intelligent power management including automatic restart after power interruption, parameter memory retention, and programmable over-temperature alarm with audible/visual alerts.

Sample Compatibility & Compliance

The DW-300CL accommodates a broad spectrum of life science and industrial samples: microbiological cultures (e.g., psychrophilic bacteria, cryopreserved cell lines), temperature-sensitive media formulations, polymer-based calibration standards, electronic components undergoing thermal stress screening, and reference materials for stability studies. Its chamber geometry (580 × 540 × 950 mm) allows stacking of standard ISO-compliant petri dishes, multi-well plates, and 500 mL Erlenmeyer flasks without airflow obstruction. While not certified to UL 61010-2-040 or FDA 21 CFR Part 11 out-of-the-box, the unit supports integration with external data loggers compliant with ISO/IEC 17025-accredited validation protocols. Optional RS485 interface enables connection to centralized building management systems (BMS) or LIMS platforms for audit-ready temperature logging—aligning with GxP documentation expectations for storage and incubation environments.

Software & Data Management

The DW-300CL operates via an embedded LCD interface with tactile membrane keys—designed for glove-compatible operation and minimal firmware complexity. It records real-time temperature history in non-volatile memory and retains user-defined setpoints, alarm thresholds, and timer configurations across power cycles. Though it does not include native cloud connectivity or proprietary software, its RS485 port (optional) supports Modbus RTU communication for integration with third-party SCADA systems or validated data acquisition software such as LabVIEW or WinCC. For regulated environments, users may deploy external Class I, Division 2–rated data loggers (e.g., Omega OM-DAQPRO-5300) connected through the standard 25 mm test port—enabling time-stamped, tamper-evident temperature profiles compliant with ISO 13485 and USP guidelines on environmental monitoring.

Applications

• Low-temperature microbial cultivation and growth kinetics studies at controlled sub-zero setpoints.
• Accelerated stability testing of biologics, vaccines, and lyophilized formulations per ICH Q1A(R2) guidance.
• Environmental stress screening of semiconductors, PCBs, and aerospace-grade composites.
• Controlled storage of enzyme solutions, restriction enzymes, and RNA extraction reagents requiring sustained cold-chain integrity.
• Material science research involving phase-transition behavior of hydrogels, waxes, and thermosetting resins.
• Calibration and verification of secondary temperature sensors used in ISO/IEC 17025-certified laboratories.

FAQ

What is the minimum operating temperature of the DW-300CL?
The unit achieves a stable setpoint down to –10 °C, verified under standard laboratory conditions (23 °C ambient, 50% RH). Performance below –5 °C may require extended stabilization time depending on load mass and door-opening frequency.
Is the internal chamber humidity controlled?
No—this is a dry-air incubator. Humidity is not actively regulated; relative humidity will vary passively with temperature and ambient conditions. For humidified operation, a separate steam generator or external humidification module is required.
Can the DW-300CL be validated for GMP use?
Yes—its mechanical design, parameter retention capability, and optional RS485 interface support IQ/OQ/PQ execution per ASTM E2500 and Annex 15. Full qualification requires third-party thermocouple mapping and alarm response testing.
What safety certifications does the unit carry?
It complies with IEC 61010-1:2010 for laboratory equipment safety. CE marking is applied per EU Machinery Directive 2006/42/EC. No ATEX or IECEx certification is provided.
How many shelves are included, and are they load-rated?
Three adjustable stainless-steel shelves are supplied, each rated for 15 kg distributed load. Shelf spacing is configurable in 25 mm increments across the full chamber height.