DRETOP DW-500CA Low Temperature Incubator

Overview

The DRETOP DW-500CA Low Temperature Incubator is an engineered environmental chamber designed for precise, stable thermal control across a broad operating range of −20 °C to +65 °C. It employs dual-mode thermal regulation—compressor-based refrigeration coupled with air-jacketed resistive heating—to achieve high reproducibility in temperature-sensitive biological and materials science workflows. Unlike forced-air ovens or standard CO₂ incubators, the DW-500CA prioritizes thermal stability over rapid ramping, making it suitable for long-duration storage and cultivation tasks where drift mitigation and spatial consistency are critical. Its architecture supports applications requiring sustained low-temperature operation—including cryopreservation support, cold-adapted microbial culture, pharmaceutical stability testing per ICH Q1A(R3), and extended environmental stress screening of electronic components under controlled sub-ambient conditions.

Key Features

• Microprocessor-controlled P.I.D temperature regulation with 0.1 °C resolution and real-time digital display on a backlit LCD touchscreen interface;
• Air-jacketed heating system ensures uniform thermal distribution without direct contact between heating elements and chamber interior;
• High-efficiency hermetic compressor with built-in protection logic—including programmable start/stop delays and minimum off-cycle intervals—to extend service life and ensure operational continuity;
• Embedded observation window with integrated anti-fog heating circuitry to maintain optical clarity during low-temperature operation;
• 25 mm-diameter access port (stainless steel capped when unused) for external sensor cabling, power feedthrough, or data acquisition integration;
• Key-locked door mechanism prevents unauthorized access, supporting GLP-compliant sample integrity protocols;
• Stainless steel interior chamber with fully adjustable, removable shelves; smooth-welded corners and radius-edged transitions eliminate cleaning voids;
• Eco-conscious refrigeration using R134a—a zero-ozone-depletion-potential (ODP), low-global-warming-potential (GWP) refrigerant compliant with EU F-Gas Regulation (EU) No 517/2014;
• Four-point leveling feet with locking casters enable both stable floor mounting and repositioning within laboratory aisles.

Sample Compatibility & Compliance

The DW-500CA accommodates a wide variety of sample formats—including stacked Petri dishes, multiwell plates, serum bottles, vial racks, and component trays—within its 500 L working volume. Its stainless steel interior resists corrosion from repeated ethanol, hydrogen peroxide vapor, or quaternary ammonium disinfectant exposure, facilitating routine decontamination per CDC/NIH biosafety guidelines. While not certified for medical device sterilization (ISO 17665) or cleanroom classification (ISO 14644), the unit meets general-purpose laboratory equipment safety standards including IEC 61010-1:2010 for electrical safety and EN 60335-1:2012 for household and similar electrical appliances. Its temperature logging capability (via optional RS485 interface) supports audit-ready documentation for ISO/IEC 17025-accredited labs performing method validation or stability studies aligned with USP and ICH Q5C.

Software & Data Management

The embedded control system records setpoint history, actual chamber temperature, and alarm events in non-volatile memory. In the event of power interruption or system reset, all user-defined parameters—including temperature setpoint, alarm thresholds, and timer settings—are retained and automatically restored upon reboot. Optional RS485 serial communication enables connection to centralized lab monitoring platforms (e.g., LabArchives, Thermo Fisher SampleManager, or custom SCADA systems) for remote status polling and time-stamped data export. When paired with an external data logger, the DW-500CA satisfies FDA 21 CFR Part 11 requirements for electronic records and signatures—provided that institutional IT policies enforce role-based access control, audit trail activation, and periodic backup verification.

Applications

• Low-temperature microbial culture of psychrophilic and psychrotolerant strains (e.g., Pseudomonas fluorescens, Colwellia psychrerythraea) for enzymology and bioremediation research;
• Extended storage of temperature-labile reagents, growth media, and monoclonal antibody formulations at controlled sub-zero conditions;
• Accelerated stability testing of active pharmaceutical ingredients (APIs) and finished dosage forms per ICH Q1A(R3) guidelines;
• Environmental stress screening of printed circuit boards (PCBs), sensors, and polymer composites under defined thermal cycling profiles;
• Pre-conditioning of calibration standards prior to metrological assessment in metrology labs;
• Support incubation for cold-chain validation studies involving vaccine carriers and insulated shipping containers.

FAQ

What is the recommended maintenance interval for the compressor and refrigerant circuit?
Annual inspection by authorized service personnel is advised, including refrigerant pressure verification, condenser coil cleaning, and fan motor lubrication.
Can this incubator be used for freezing biological samples?
No—it is not a freezer; it maintains temperatures down to −20 °C but lacks rapid freezing capability or cryogenic hold functionality required for vitrification or snap-freezing.
Is the internal temperature uniformity validated per ISO 15334-2?
Uniformity mapping is not factory-certified; users must perform in-house qualification using calibrated thermistors or PT100 probes per ISO/IEC 17025 procedures.
Does the unit support programmable ramp-soak cycles?
The base configuration does not include multi-step programming; however, optional intelligent controller upgrade enables up to 30 segment temperature/time profiles.
What is the maximum ambient temperature rating for continuous operation?
Rated for ambient environments up to 30 °C at 60% relative humidity; performance degradation may occur above this threshold due to reduced condenser efficiency.