DRETOP ACW-350Pro Anaerobic Incubator

Overview

The DRETOP ACW-350Pro Anaerobic Incubator is a manually operated, high-integrity controlled-atmosphere system engineered for reproducible cultivation of obligate anaerobes, microaerophiles, and oxygen-sensitive cell lines under precisely regulated low-oxygen or anaerobic conditions. It operates on the principle of sequential vacuum-gas replacement—utilizing an oil-free dry piston vacuum pump followed by controlled introduction of pre-mixed gases—to establish and maintain defined O₂ partial pressures within the sample chamber. Unlike continuous-flow or catalytic systems, this method ensures rapid equilibration (≤50 minutes for full chamber anaerobiosis), minimal cross-contamination risk, and compatibility with strict GLP-compliant workflows where gas composition traceability and environmental stability are critical. The unit is widely deployed in clinical microbiology laboratories, pharmaceutical R&D facilities, and academic research centers conducting studies on Clostridium perfringens, Bacteroides fragilis, Porphyromonas gingivalis, Campylobacter jejuni, and other fastidious organisms requiring O₂ concentrations ≤1% for optimal growth.

Key Features

• Intelligent PID temperature control with linear compensation algorithm, delivering stable thermal performance across the full operating range (RT+3°C to 65°C) with ±0.5°C stability and ±1°C uniformity.
• Real-time O₂ concentration monitoring via integrated electrochemical sensor, displaying values in either percentage (%) or parts-per-million (ppm) format on a responsive 7-inch color touchscreen interface.
• Robust 304 stainless-steel interior chamber and gas-handling components, resistant to corrosion from repeated sterilization cycles and reactive gas mixtures (e.g., H₂-containing blends).
• Dual-stage gas delivery architecture: first-stage evacuation via oil-free dry vacuum pump; second-stage precision metering through tactile electromagnetic valves enabling fine-tuned flow adjustment for N₂, CO₂, H₂, or custom blends.
• Integrated UV-C germicidal lamp (254 nm) and internal LED illumination for sterile sample handling and visual verification of culture status without atmospheric breach.
• Fail-safe engineering including over-temperature cutoff, automatic power-loss memory retention, audible/visual alarm triggers, and self-diagnostic firmware reporting.

Sample Compatibility & Compliance

The ACW-350Pro accommodates standard Petri dishes (up to 150 mm), multi-well plates, anaerobic jars, and small-volume bioreactors within its 33.6 L working volume (400 × 300 × 280 mm). Its design conforms to ISO 13408-1 (aseptic processing), ASTM E2612 (microbiological incubator performance testing), and supports adherence to USP <61>/<62>, CLSI M45, and EU GMP Annex 1 requirements for environmental control in microbial testing. While not intrinsically certified for IEC 61010-1, the unit meets essential safety criteria for laboratory electrical equipment—including reinforced insulation, grounded chassis construction, and Class II protection against electric shock.

Software & Data Management

The embedded controller logs time-stamped temperature and O₂ readings at user-configurable intervals (1–60 min), storing up to 30 days of data locally on internal flash memory. Export is supported via USB port in CSV format for integration into LIMS or ELN platforms. Optional RS485 interface enables Modbus RTU communication for centralized facility monitoring systems. All parameter changes—including setpoints, alarm thresholds, and gas cycle timing—are recorded with timestamped audit trails compliant with FDA 21 CFR Part 11 principles when paired with validated third-party data acquisition software.

Applications

• Clinical isolation and identification of pathogenic anaerobes including Shigella spp., Clostridioides difficile, and Fusobacterium nucleatum.
• Hypoxia modeling in cancer biology and stem cell research using tunable O₂ setpoints (1–5% O₂ for physioxia; <0.5% for severe hypoxia).
• Quality control testing of probiotic formulations containing Lactobacillus and Bifidobacterium strains.
• Materials science applications requiring inert atmospheres—such as electrode conditioning for Li-ion battery R&D or thin-film deposition pre-treatment—where residual O₂ must remain below detection limits.
• Validation of anaerobic packaging integrity for medical device sterilization pouches and pharmaceutical blister packs.

FAQ

What gas mixtures are compatible with the ACW-350Pro?

The system supports any non-corrosive, non-flammable gas blend delivered through standard CGA-580 or CGA-330 fittings—including 85% N₂ / 10% CO₂ / 5% H₂ (for catalytic O₂ scavenging), pure N₂ (99.99%), or custom ratios tailored to specific microbial growth protocols.
How long does it take to achieve <1% O₂ in the main chamber?

Using the standard three-cycle vacuum-gas exchange protocol, O₂ concentration drops to ≤1% within 45–50 minutes. A single-cycle “quick purge” mode achieves ~2–3% O₂ in under 15 minutes for less stringent applications.
Is humidity control available as a factory option?

No. The ACW-350Pro is designed for dry-anoxic operation. For humidity-dependent cultures, users must employ secondary containment (e.g., sealed humidified Petri dish inserts) or integrate external saturated salt solutions within the chamber.
Can the unit be validated for IQ/OQ/PQ documentation?

Yes. DRETOP provides a comprehensive validation support package—including as-delivered calibration certificates (temperature, O₂ sensor), test protocols aligned with ISO 17025-accredited labs, and traceable reference standards—for use in formal qualification processes.
Does the system include catalytic O₂ removal?

No. The ACW-350Pro relies exclusively on physical gas displacement rather than palladium-based catalysts. This eliminates hydrogen dependency, reduces fire risk, and avoids potential metal leaching into sensitive biological samples.