DRETOP ZAI-350R Manual Anaerobic Incubator

Overview

The DRETOP ZAI-350R Manual Anaerobic Incubator is an engineered environmental control system designed to establish and maintain precisely defined low-oxygen or strictly anaerobic atmospheres for microbiological cultivation, cell-based hypoxia studies, and materials processing under inert conditions. It operates on the principle of sequential vacuum-gas exchange cycling—repeated evacuation followed by controlled re-filling with certified pre-mixed gas (typically 5% H₂ / 10% CO₂ / 85% N₂)—to achieve reproducible O₂ concentrations as low as 0.1% (1000 ppm), with verified maintenance of ≤1% O₂ for over 12 hours after gas flow termination. Unlike automated systems with integrated O₂ sensors and feedback loops, the ZAI-350R implements manual gas regulation via tactile electromagnetic valves and a dry, oil-free diaphragm vacuum pump—ensuring zero hydrocarbon contamination risk to sensitive biological samples or oxygen-sensitive materials such as lithium-ion battery cathodes, OLED precursors, or MOCVD substrates. Its dual-chamber architecture includes a front-access pass-through antechamber (330 × 320 mm) for sample introduction without disturbing the main incubation environment, and a primary working chamber (800 × 690 × 660 mm) fitted with long-reach 304 stainless steel gloves, UV germicidal irradiation (254 nm), and internal LED illumination.

Key Features

• Manual gas control interface with tactile electromagnetic valves enabling precise, stepwise adjustment of N₂/H₂/CO₂ mixture flow rates—ideal for laboratories requiring full procedural transparency and operator-defined gas transition protocols.
• Oil-free dry diaphragm vacuum pump eliminates lubricant vapor carryover, ensuring sterility integrity and compatibility with ultra-high-purity applications in semiconductor fabrication and battery R&D.
• 304 stainless steel inner chamber and reinforced 12 mm tempered glass front window provide corrosion resistance, structural rigidity, and optical clarity for real-time visual monitoring under operational pressure differentials.
• Microprocessor-based PID temperature controller with linear compensation algorithm delivers ±0.5°C stability and ±1°C uniformity across the full 4–60°C operating range, validated per ASTM E2874–22 for incubator thermal performance.
• Dual-stage safety architecture: independent overtemperature cutoff circuitry with audible/visual alarm, plus automatic power interruption upon sensor fault detection or abnormal pressure deviation.
• Integrated UV-C sterilization lamp (254 nm, 15 W) and HEPA-filtered gas inlet mitigate airborne microbial ingress, supporting GLP-compliant workflows for clinical microbiology and pharmaceutical QC testing.

Sample Compatibility & Compliance

The ZAI-350R supports cultivation of obligate anaerobes—including Clostridium perfringens, Bacteroides fragilis, Porphyromonas gingivalis, and Campylobacter jejuni—under ISO 11133:2014–specified atmospheric conditions. Its ability to sustain ≤1% O₂ for >12 h post-gas-shutoff meets CLSI M46–A2 requirements for anaerobic susceptibility testing. For non-biological use, the chamber’s inert atmosphere and absence of outgassing materials (per USP ) enable stable conditioning of moisture- and oxygen-sensitive electronic components. The unit complies with IEC 61010–1:2010 for laboratory equipment safety and carries CE marking for EMC and LVD directives. All electrical interfaces—including optional RS485 and USB ports—support audit-trail-capable data logging when paired with validated third-party software compliant with FDA 21 CFR Part 11 Annex 11 requirements.

Software & Data Management

While the ZAI-350R operates via standalone hardware controls (no embedded OS), its analog/digital hybrid architecture enables seamless integration into centralized lab management platforms. Optional RS485 Modbus RTU output permits real-time acquisition of chamber temperature, elapsed cycle time, and vacuum status into SCADA or LIMS environments. USB port connectivity allows firmware updates and configuration backup using DRETOP’s validated PC utility (v3.2+), which generates timestamped .csv logs with CRC-32 integrity verification. All parameter settings—including temperature setpoint, gas exchange cycle count, and UV exposure duration—are retained during power loss via non-volatile EEPROM memory, satisfying GLP data integrity criteria for traceability and reproducibility.

Applications

• Clinical and research microbiology: isolation and subculture of fastidious anaerobes from stool, wound, and blood specimens per CLSI guidelines.
• Hypoxia modeling: mammalian cell culture under physiologically relevant O₂ tensions (1–5%) to study HIF-1α signaling, tumor metabolism, and stem cell differentiation.
• Materials science: controlled-atmosphere aging of solid-state electrolytes, cathode coatings, and perovskite thin films where residual O₂ induces irreversible phase degradation.
• Food safety testing: enumeration of Shigella spp., Lactobacillus spp., and Clostridium botulinum spores in accordance with AOAC 996.04 and ISO 15214.
• Electrochemical device manufacturing: glovebox-free preconditioning of Li-metal anodes and sulfur cathodes prior to coin-cell assembly.

FAQ

What gas mixture is required for standard anaerobic operation?
A certified pre-mixed gas containing 5% hydrogen (H₂), 10% carbon dioxide (CO₂), and 85% nitrogen (N₂) is recommended for catalytic removal of residual O₂ via palladium-mediated recombination. Alternative blends may be used if validated for target organisms.
Does the ZAI-350R support CO₂ concentration control?
No—CO₂ is delivered only as a fixed component of the supplied gas mixture. Independent CO₂ regulation requires external gas blending modules or upgrade to the ACW-350Pro series.
Can the chamber accommodate standard Petri dishes and multi-well plates?
Yes—the interior accommodates up to six 150-mm Petri dishes or twelve 96-well plates on the included 400 × 300 × 280 mm adjustable shelf, with 660 mm vertical clearance for stacked configurations.
Is calibration documentation provided with shipment?
Each unit ships with a factory-verified calibration certificate for temperature (NIST-traceable RTD probe) and vacuum performance (digital manometer), valid for 12 months from date of issue.
What maintenance is required for the dry vacuum pump?
None—oil-free diaphragm design eliminates lubrication schedules; only periodic inspection of intake filter (included) every 6 months is advised under continuous use.