DRETOP ACW-350Pro-II Anaerobic Incubator

Overview

The DRETOP ACW-350Pro-II Anaerobic Incubator is a manually operated, high-integrity environmental chamber engineered to establish and sustain precisely controlled anaerobic or microaerophilic atmospheres for microbiological cultivation, cell-based hypoxia studies, and materials processing under oxygen-restricted conditions. It operates on the principle of sequential vacuum evacuation and gas replacement—utilizing an oil-free dry diaphragm pump and solenoid-controlled gas manifold—to achieve oxygen concentrations as low as 0.1% (1000 ppm), with validated stability below 1% O₂ for over 12 hours without active gas replenishment. The system integrates dual-zone control logic: a transfer airlock (330 × 320 mm) enables rapid sample entry with ≤5-minute deoxygenation, while the main incubation chamber (800 × 690 × 660 mm) maintains long-term anaerobic integrity through optimized gas flow dynamics and thermal inertia. Its architecture conforms to fundamental requirements for ISO 14644-1 Class 5 clean handling environments when used with filtered gas lines and UV sterilization protocols.

Key Features

• Full-color capacitive touchscreen interface with real-time display of internal O₂ concentration (% or ppm), ambient pressure, temperature setpoint/actual, and system status—eliminating mechanical buttons and supporting intuitive workflow navigation.
• PID-based temperature regulation with linear compensation and self-diagnostic routines; achieves ±0.5°C stability and ±1°C uniformity across the entire chamber volume within the range of RT + 3°C to 65°C.
• 304 stainless steel interior chamber and reinforced 12 mm tempered front viewing window ensure corrosion resistance, structural integrity, and optical clarity during extended operation.
• Integrated UV-C germicidal lamp (254 nm) and HEPA-filtered gas inlet mitigate microbial contamination risks—critical for strict anaerobe isolation (e.g., Clostridium perfringens, Bacteroides fragilis, Porphyromonas gingivalis) and low-oxygen mammalian cell culture.
• Oil-free dry vacuum pump eliminates hydrocarbon carryover, ensuring sample purity—particularly essential for battery material synthesis, OLED precursor handling, and semiconductor-grade inert processing.
• Configurable gas manifold with tactile electromagnetic valves allows precise metering of N₂, H₂/CO₂/N₂ mixtures, or custom blends; compatible with standard CGA-580 or CGA-330 regulators.

Sample Compatibility & Compliance

The ACW-350Pro-II accommodates standard Petri dishes, anaerobic jars, multi-well plates, tissue culture flasks (up to T225), and small-scale reaction vessels. Its chamber geometry permits vertical stacking of up to four adjustable stainless steel shelves (400 × 300 × 280 mm each). For regulatory alignment, the unit supports traceable operation under Good Laboratory Practice (GLP) and current Good Manufacturing Practice (cGMP) frameworks: all user inputs, alarm events, temperature/O₂ deviations, and power interruption occurrences are time-stamped and retainable via optional USB data export. While not certified to IEC 61010-1 or UL 61010B out-of-the-box, its electrical design meets EN 61000-6-3 EMC emission limits and incorporates redundant thermal cutoffs compliant with Class III safety requirements.

Software & Data Management

The embedded firmware provides non-volatile memory for parameter retention—including setpoints, ramp rates, and gas profiles—with automatic recovery after power loss. Event logs capture timestamps for door openings, O₂ excursions (>±0.2%), temperature deviations (>±0.8°C), and UV cycle activation. Optional RS485 serial interface enables integration into centralized lab monitoring systems (e.g., LabVantage, Thermo Fisher SampleManager) using Modbus RTU protocol. USB port supports firmware updates and CSV-formatted log extraction without proprietary software dependencies. No cloud connectivity or remote access capabilities are included—preserving data sovereignty per institutional IT policies.

Applications

• Clinical and research microbiology: cultivation of obligate anaerobes (Actinomyces, Fusobacterium, Prevotella) and microaerophiles (Campylobacter jejuni, Helicobacter pylori) per CLSI M45 and ISO 11133 standards.
• Hypoxia modeling: physiological O₂ gradients (1–5%) for stem cell differentiation, tumor spheroid assays, and ischemia-reperfusion studies.
• Materials science: moisture- and oxygen-sensitive synthesis of solid-state electrolytes, perovskite precursors, and Li-metal anode coatings.
• Electrochemical device fabrication: glovebox-free assembly of lithium-ion pouch cells, supercapacitors, and thin-film batteries requiring <100 ppm O₂ exposure.
• Food safety testing: enumeration of Shigella spp., Clostridium botulinum, and lactic acid bacteria under standardized AOAC and FDA BAM protocols.

FAQ

What gas mixture is required to achieve strict anaerobiosis (≤1% O₂)?
A pre-mixed gas containing 5% H₂, 10% CO₂, and 85% N₂ is recommended. The H₂ catalytically scavenges residual O₂ via palladium catalyst (not included but compatible with optional add-on modules), while CO₂ supports microbial growth and pH buffering.
Can the chamber maintain anaerobiosis during extended power outages?
Yes—the insulated polyurethane foam walls and sealed gasket design enable passive O₂ diffusion suppression; validated maintenance exceeds 12 hours at <1% O₂ after gas supply termination.
Is the touchscreen interface programmable for multi-step gas/temperature profiles?
No—the ACW-350Pro-II supports only single-setpoint operation; it does not feature time-based ramp/soak programming. For dynamic atmosphere sequencing, consider the ACW-350Pro-III variant with optional PLC controller.
Does the unit comply with FDA 21 CFR Part 11 for electronic records?
It provides audit-trail-capable logging but lacks digital signature enforcement, role-based access control, or electronic signature functionality required for full Part 11 compliance. Validation documentation packages are available upon request for IQ/OQ execution.
What maintenance is required for the vacuum pump?
None—the oil-free diaphragm pump requires no lubrication, filter replacement, or scheduled servicing beyond periodic visual inspection of intake filters (included). Mean time between failures exceeds 15,000 operating hours.