DRETOP DW-300CA Low-Temperature Incubator

Overview

The DRETOP DW-300CA Low-Temperature Incubator is a precision-engineered environmental chamber designed for stable, reproducible temperature control across a wide operational range from –20 °C to +65 °C. Unlike standard ambient or CO₂ incubators, the DW-300CA integrates compressor-based refrigeration with air-jacketed heating—enabling rapid thermal response and minimized internal gradient formation. Its architecture follows fundamental principles of convective heat transfer optimization: a high-efficiency axial fan system generates laminar, uniform airflow across stainless steel interior surfaces, while the insulated air jacket minimizes thermal bridging and improves energy efficiency. This dual-mode thermal management system supports both low-temperature storage and active biological incubation, making it suitable for applications requiring strict thermal stability under variable ambient conditions—particularly in laboratories where ambient temperatures exceed 30 °C or where long-term sample integrity at sub-zero conditions is critical.

Key Features

• Microprocessor-controlled P.I.D temperature regulation with 0.1 °C resolution and ±0.5 °C fluctuation tolerance—engineered for GLP-compliant process validation.
• Air-jacketed heating system ensures rapid recovery after door opening and eliminates hot/cold spots common in direct-heating designs.
• Embedded anti-fog observation window with integrated resistive door heating prevents condensation during low-temperature operation, enabling continuous visual monitoring without compromising thermal integrity.
• Stainless steel interior (304 grade), fully removable and height-adjustable shelves, and radius-corner construction eliminate microbial harborage zones—supporting ISO 14644-1 Class 7 cleanroom-compatible cleaning protocols.
• Dual-mode mobility system: four omnidirectional casters with independent locking mechanisms allow precise repositioning in constrained lab spaces while maintaining vibration-dampened stability during operation.
• Compressor protection suite includes programmable start-delay, minimum off-cycle intervals, and thermal overload cutoff—extending service life beyond 15,000 operating hours under continuous duty.
• CFC-free R134a refrigerant complies with EU F-Gas Regulation (EU No 517/2014) and U.S. EPA SNAP program requirements for laboratory equipment.

Sample Compatibility & Compliance

The DW-300CA accommodates diverse sample formats including Petri dishes, multi-well plates, serum bottles, glass vials, and sealed environmental test chambers up to 300 L total volume. Its temperature profile meets ASTM E2875–22 (Standard Practice for Validation of Environmental Chambers) for stability verification. The unit is compatible with IQ/OQ/PQ documentation frameworks and supports audit-ready operation through configurable alarm logging (temperature deviation, door open duration, power interruption). While not certified to IEC 61010-1 for hazardous location use, its electrical design conforms to EN 61010-1:2010 safety standards for laboratory equipment. Key-lock access control satisfies internal SOP requirements for restricted-access sample storage in regulated QC/QA environments.

Software & Data Management

The onboard controller records real-time temperature data at user-defined intervals (1–60 min) and stores up to 30 days of history in non-volatile memory. Optional RS485 interface enables Modbus RTU communication with SCADA systems or LIMS platforms (e.g., LabWare, STARLIMS), supporting automated data export in CSV format. All parameter changes—including setpoint adjustments, alarm thresholds, and timer settings—are time-stamped and logged with operator ID (via optional password protection module). The system retains configuration integrity during power loss and resumes operation within 2 seconds of supply restoration—meeting FDA 21 CFR Part 11 requirements for electronic record retention when paired with validated third-party data acquisition software.

Applications

• Long-term storage and viability testing of microbial cultures, hybridoma cells, and cryopreserved reagents at controlled sub-zero temperatures.
• Accelerated stability studies of pharmaceutical excipients and diagnostic reagents per ICH Q1A(R3) guidelines.
• Low-temperature stress testing of electronic components (e.g., PCBs, sensors) under controlled thermal cycling per MIL-STD-810H Method 502.7.
• Environmental simulation for polymer aging, battery electrolyte performance, and composite material characterization.
• Pre-conditioning of analytical standards prior to HPLC or GC injection to minimize thermal shock-induced degradation.
• Supporting ISO/IEC 17025-accredited calibration labs requiring traceable temperature-controlled holding environments for reference material equilibration.

FAQ

What is the maximum ambient temperature at which the DW-300CA maintains –20 °C internally?
The unit is rated for continuous operation in ambient environments up to 32 °C. At 35 °C ambient, minimum achievable temperature degrades to approximately –15 °C; consult technical support for site-specific derating analysis.
Can the DW-300CA be validated for GMP compliance?
Yes—the controller supports configurable alarm thresholds, event logging, and parameter lockout. Full qualification requires installation of optional RS485 interface and integration with validated data acquisition software meeting Annex 11 and ALCOA+ principles.
Is the 25 mm test port rated for vacuum or pressure differentials?
No—the port is designed for passive cable routing only. It is not sealed against differential pressure and must not be used in evacuated or pressurized applications.
Does the unit include a certificate of conformance or factory calibration report?
Each unit ships with a CoC referencing EN 61010-1 and RoHS compliance. NIST-traceable temperature calibration certificates are available as a paid option (Model: CAL-DW300CA-TC).
Are replacement shelves and gaskets available as spare parts?
Yes—stainless steel shelves (Part No. DW-SH300-SS), silicone door gasket kits (DW-GSK300), and key-lock cylinder assemblies (DW-KL300) are stocked and ship within 3 business days globally.