DRETOP ACW-350Pro Automated Anaerobic Incubator

Overview

The DRETOP ACW-350Pro Automated Anaerobic Incubator is an engineered environmental control system designed for the precise cultivation and manipulation of obligate anaerobes, microaerophiles, and hypoxia-sensitive biological samples. It operates on a validated gas-replacement principle—utilizing sequential vacuum evacuation and controlled re-filling with inert or defined gas mixtures—to establish and maintain stable, reproducible low-oxygen atmospheres within its sealed 304 stainless steel working chamber. Unlike passive or catalyst-based systems, the ACW-350Pro employs active, programmable gas management with real-time O₂ monitoring (0.1–25% range, displayable in % or ppm), enabling rigorous experimental control over oxygen partial pressure—a critical parameter in studies of microbial metabolism, gut microbiota dynamics, wound healing models, and stem cell differentiation under hypoxic conditions. Its temperature regulation architecture integrates PID-controlled heating with linear thermal compensation and high-stability air circulation via low-noise axial fans, delivering uniform thermal distribution (±1°C) across the full 367 L internal volume (800 × 690 × 660 mm). The system meets core functional requirements for GLP-compliant microbiological laboratories and aligns with ISO 11133:2014 guidelines for preparation and production of culture media.

Key Features

• Automated gas management interface with touch-activated solenoid valves for precise flow control of N₂, H₂/CO₂/N₂ blends, or ultra-pure N₂ (99.99%)
• Integrated oil-free dry piston vacuum pump—eliminates hydrocarbon contamination risk and requires no routine lubrication or filter replacement
• Full-color capacitive touchscreen HMI with real-time ambient pressure readout, multi-zone data visualization, and intuitive parameter navigation
• Robust 304 stainless steel inner chamber and 12 mm tempered front viewing window—resistant to corrosion, impact, and repeated chemical decontamination
• Dual-chamber architecture: dedicated pass-through airlock (330 × 320 mm) for rapid sample transfer without compromising main chamber integrity
• Onboard UV-C germicidal lamp (254 nm) and interior LED illumination—enabling sterile workflow initiation and visual monitoring during operation
• Comprehensive safety suite: over-temperature cut-off, fault-triggered audible/visual alerts, automatic power recovery with parameter retention after grid interruption

Sample Compatibility & Compliance

The ACW-350Pro supports diverse biological and material science applications requiring strict oxygen exclusion. It is routinely deployed for cultivation of clinically relevant anaerobes—including Clostridium perfringens, Bacteroides fragilis, Porphyromonas gingivalis, Campylobacter jejuni, and Shigella spp.—in accordance with CLSI M45-A3 and USP standards. Its adjustable O₂ setpoint capability (0.1–25%) also facilitates controlled hypoxia studies for mammalian cell lines (e.g., HIF-1α stabilization assays) and organoid cultures. For non-biological use, the chamber’s inert atmosphere and particulate-free environment meet ISO 14644-1 Class 5 (ISO Class 5) cleanroom-equivalent handling requirements for lithium-ion battery electrode processing, OLED thin-film deposition pre-treatment, and semiconductor packaging validation. All electrical components comply with IEC 61010-1 safety standards; gas pathways conform to ISO 8573-1:2010 Class 2 purity specifications when supplied with certified gases.

Software & Data Management

The embedded control firmware logs time-stamped operational parameters—including chamber temperature, measured O₂ concentration, vacuum cycle duration, gas injection volume, and fault events—with timestamped records stored internally (≥30 days) and exportable via USB 2.0 interface. Optional RS485 communication enables integration into centralized lab automation platforms (e.g., LabVantage, Thermo Fisher SampleManager) for audit-trail generation compliant with FDA 21 CFR Part 11 requirements. While the base unit does not include cloud connectivity, its deterministic control logic and non-volatile memory ensure full traceability of process conditions—supporting GMP documentation workflows where electronic records must demonstrate integrity, authenticity, and immutability. User access levels (operator, supervisor, administrator) can be configured to enforce procedural controls during method execution.

Applications

• Clinical microbiology: Isolation and subculture of fastidious anaerobes from stool, blood, and tissue specimens
• Gut microbiome research: Maintenance of complex anaerobic consortia for fecal microbiota transplantation (FMT) studies
• Pharmaceutical QC: Stability testing of oxygen-labile drug formulations and excipients under defined headspace conditions
• Biomedical engineering: Hypoxic preconditioning of mesenchymal stem cells prior to transplantation
• Materials science: Controlled-atmosphere annealing of cathode materials for solid-state batteries
• Food safety testing: Enumeration of Clostridium botulinum spores in low-acid canned products per AOAC 977.27

FAQ

What gas mixtures are supported for anaerobic conditioning?
The system accepts pre-mixed gases (e.g., 85% N₂ / 5% H₂ / 10% CO₂) and ultra-high-purity nitrogen (99.99%), with independent inlet ports and calibrated mass-flow control for each line.
How long does it take to achieve ≤1% O₂ in the main chamber?
Under standard operating conditions (25°C ambient), full anaerobic status (O₂ ≤1%) is attained within 50 minutes using the automated vacuum-purge sequence.
Is humidity actively regulated?
No—humidity is maintained via natural evaporation from a removable stainless steel water pan; users may add sterile distilled water to achieve ~95% RH at 37°C.
Can the incubator be integrated into a BMS or facility SCADA network?
Yes—via optional RS485 Modbus RTU protocol support, enabling remote status polling, setpoint adjustment, and alarm forwarding to central monitoring systems.
What validation documentation is provided?
Each unit ships with a Factory Acceptance Test (FAT) report including temperature uniformity mapping (ASTM E2297-22), O₂ sensor calibration certificate traceable to NIST standards, and leak-rate verification (<0.5 mL/min at 100 Pa differential).