DRETOP DW-300CB Ultra-Low Temperature Incubator

Overview

The DRETOP DW-300CB Ultra-Low Temperature Incubator is a precision-engineered environmental test chamber designed for controlled low-temperature applications in research laboratories, quality control facilities, and industrial R&D environments. Unlike standard refrigerated incubators, the DW-300CB integrates advanced microprocessor-based P.I.D. temperature regulation with a robust dual-stage cooling architecture capable of sustaining stable operation from −40 °C to +65 °C. Its thermal management system leverages environmentally compliant hydrofluoroolefin (HFO)-based refrigerant—free of ozone-depleting substances and high-global-warming-potential (GWP) compounds—ensuring regulatory alignment with EU F-Gas Regulation (EU No. 517/2014) and EPA SNAP program requirements. The chamber’s primary function is to maintain thermally stable conditions for biological sample preservation, pharmaceutical stability testing (per ICH Q1A–Q1E), microbiological culture incubation under sub-zero stress conditions, and low-temperature functional validation of electronic components and polymer-based materials.

Key Features

• Intelligent P.I.D. temperature controller with 0.1 °C resolution and real-time digital display; supports programmable ramp-soak profiles and automatic over-temperature alarm with audible/visual alert.
• Reinforced structural design: cold-rolled steel outer shell with stainless-steel interior chamber (304 grade), fully removable and height-adjustable stainless-steel shelves for unrestricted cleaning and autoclave compatibility.
• Optimized air circulation: backward-curved centrifugal blower with laminar-flow baffle system ensures uniform temperature distribution (±0.5 °C) across the full 300 L working volume.
• Enhanced operational security: key-lock door mechanism prevents unauthorized access; embedded anti-fog heated observation window minimizes condensation during low-temperature operation.
• Integrated safety architecture: compressor delay start, cycle protection, and power-loss recovery memory retain setpoints and runtime data after unexpected shutdowns or grid interruptions.
• Modular utility interface: standard 25 mm diameter external access port with stainless-steel plug enables integration with external sensors, power supplies, or data loggers without compromising chamber integrity.

Sample Compatibility & Compliance

The DW-300CB accommodates a broad spectrum of sample types—including cryopreserved cell suspensions, lyophilized biologics, temperature-sensitive reagents, microbial cultures (e.g., psychrophilic strains), and solid-state electronic assemblies—within its validated operating envelope. Chamber geometry (interior dimensions: 450 × 380 × 590 mm) supports ISO/IEC 17025-compliant placement of calibrated reference probes per ASTM E2207-22 “Standard Practice for Calibration of Environmental Chambers.” Its temperature stability profile meets the repeatability and reproducibility criteria specified in USP <1151> “Pharmaceutical Dosage Forms” for accelerated stability studies. Optional RS485 communication interface enables traceable data export compatible with 21 CFR Part 11–compliant LIMS and ELN platforms when paired with validated software drivers.

Software & Data Management

While the base unit operates via standalone microcontroller firmware, optional upgrades include RS485 serial connectivity for remote monitoring and parameter adjustment using third-party SCADA or LabVIEW-based systems. The embedded controller logs internal temperature history at user-defined intervals (1–9999 minutes), storing up to 30 days of timestamped data in non-volatile memory. When equipped with the optional color touchscreen module, users gain access to graphical trend visualization, multi-segment temperature programming, and audit-trail-enabled event logging—including door-open duration, alarm triggers, and setpoint modifications—supporting GLP and GMP documentation workflows.

Applications

• Long-term storage and viability assessment of frozen biological specimens at −40 °C, including primary cells, stem cell lines, and tissue explants.
• Accelerated stability testing of APIs and finished dosage forms under ICH Q1A(R3) low-temperature stress conditions.
• Controlled environment testing of semiconductor devices, PCBAs, and battery modules per MIL-STD-810H Method 502.7 (Low Temperature).
• Cultivation of cold-adapted microorganisms (e.g., Pseudomonas syringae, Colwellia psychrerythraea) requiring precise sub-zero thermal regimes.
• Material property evaluation—including ductility, embrittlement onset, and dimensional stability—of polymers, elastomers, and composite laminates per ISO 22088-3.

FAQ

What is the certified temperature uniformity specification for the DW-300CB at −40 °C?
Temperature uniformity remains within ±0.5 °C across the entire working volume at all setpoints between −40 °C and +65 °C, verified per internal validation protocol aligned with VDI/VDE 2655 Part 1.
Does the unit support continuous data logging and electronic record retention?
Yes—the standard controller retains time-stamped temperature data for up to 30 days; extended logging and electronic signature capability require optional RS485 interface and validated third-party software.
Is the refrigerant used in compliance with current international environmental regulations?
Yes—the system employs an HFO-1234yf-based refrigerant blend, classified as non-ozone-depleting and possessing a GWP < 10, satisfying EU F-Gas Phase-down Schedule and EPA SNAP Acceptability List criteria.
Can the chamber be integrated into a centralized laboratory monitoring network?
With the optional RS485 module and appropriate middleware, the DW-300CB can transmit real-time temperature, alarm status, and operational events to BMS or central lab informatics platforms.
Are calibration certificates and IQ/OQ documentation available upon request?
Factory calibration reports are included; full IQ/OQ protocols and third-party certification (e.g., by TÜV or SGS) can be arranged as a value-added service prior to shipment.