DRETOP ZMJ-150-II Programmable Mold Incubator

Overview

The DRETOP ZMJ-150-II Programmable Mold Incubator is a purpose-engineered environmental chamber designed for the controlled cultivation of filamentous fungi, yeasts, and other moisture-sensitive eukaryotic microorganisms under precisely regulated temperature and relative humidity conditions. Unlike standard dry incubators, this unit integrates active humidification and programmable thermal management to replicate the hygrothermal environments required for reliable mycological growth, spore germination studies, and mold resistance testing per ASTM G21, ISO 846, and IEC 60068-2-10. Its architecture adheres to fundamental principles of passive thermal equilibrium and vapor-phase mass transfer—leveraging natural convection for gentle air exchange while minimizing mechanical shear stress on delicate hyphal structures. The chamber is widely deployed in academic microbiology laboratories, pharmaceutical quality control units, defense-related biostability assessment programs, and environmental testing facilities conducting BOD assays, microbial shelf-life validation, and accelerated aging of materials under wet-heat stress.

Key Features

• Programmable microprocessor-based controller with real-time display of setpoint, actual temperature, humidity, and elapsed time—supporting multi-step ramp-soak profiles up to 9999 minutes.
• Stainless steel interior chamber (304 grade) with fully removable, height-adjustable shelves; seamless corners and smooth welds eliminate microbial harborage zones and facilitate autoclave-compatible cleaning protocols.
• Dual-door observation window: inner tempered glass panel with magnetic silicone gasket seal ensures thermal integrity and minimizes condensation; outer door features ergonomic recessed handle and reinforced cold-rolled steel construction.
• Integrated ultraviolet germicidal irradiation (UV-C, 254 nm) system with safety interlock—automatically deactivates when door opens—to suppress airborne contaminants and maintain sterility between cycles.
• High-efficiency humidification module using piezoelectric nebulization technology, coupled with calibrated capacitive RH sensor (±3–5 %RH accuracy), enables stable moisture delivery across the full 50–85 %RH operating range.
• Energy-optimized refrigeration circuit employing R134a or R600a (model-dependent), compliant with international ozone-depletion and global-warming potential (GWP) regulations; includes compressor delay protection, thermal overload cutoff, and auto-restart after power interruption.

Sample Compatibility & Compliance

The ZMJ-150-II accommodates standard Petri dishes (up to 150 mm), slant tubes, Erlenmeyer flasks (≤500 mL), and custom culture vessels within its 150 L working volume. Its temperature uniformity (±1 °C at 25 °C, empty) and stability (±0.5 °C fluctuation) meet requirements for GLP-compliant microbial enumeration and strain preservation per USP and EP 2.6.12. Humidity control supports standardized mold susceptibility testing per MIL-STD-810H Method 508.6 and ASTM D3273. The unit’s electrical design conforms to IEC 61010-1 for laboratory equipment safety, and its UV subsystem complies with IEC 62471 photobiological safety classification (Risk Group 2). Optional RS485 interface enables integration into centralized facility monitoring systems supporting ISO/IEC 17025 traceability workflows.

Software & Data Management

While the ZMJ-150-II operates via embedded firmware without cloud connectivity, its programmable controller logs cycle parameters—including start time, target setpoints, duration, and alarm events—in non-volatile memory. All settings persist through power loss (battery-backed RAM), and user-defined profiles can be recalled without reconfiguration. For audit-ready documentation, optional accessories include an RS485-to-USB converter for serial data export to LIMS or Excel-compatible CSV files, and a thermal printer module for hard-copy record generation. When used in regulated environments, the system supports 21 CFR Part 11–compliant data integrity practices through external validation of time-stamped event logs and manual signature verification of calibration certificates.

Applications

• Mycological research: Aspergillus, Penicillium, and Fusarium spp. propagation; spore viability assays; antifungal efficacy screening.
• Pharmaceutical QC: Environmental monitoring of cleanrooms; media fill simulation validation; excipient stability under high-humidity conditions.
• Materials science: Fungal degradation testing of polymers, coatings, and composites per ISO 846.
• Environmental microbiology: BOD₅ incubation per Standard Methods 5210B; waterborne pathogen enrichment (e.g., Legionella pneumophila at 36 °C/50 %RH).
• Defense & aerospace: Evaluation of electronic component resistance to tropicalized storage conditions (MIL-STD-810H, Method 508.6).
• Academic teaching labs: Hands-on instruction in fungal life cycles, colony morphology analysis, and environmental parameter optimization.

FAQ

Does the ZMJ-150-II support automated data logging without external hardware?
No—the base configuration records operational parameters internally but requires optional RS485 or printer modules for external data capture.
Is the UV sterilization cycle programmable or manually triggered?
UV operation is manually initiated via dedicated front-panel switch with integrated timer (default 30 min); no scheduled auto-cycle is available.
Can the incubator maintain humidity below 50 %RH?
No—this model is optimized for humidification only; dehumidification capability is not included.
What is the maximum ambient temperature for safe continuous operation?
Rated for ambient environments ≤30 °C and ≤80 %RH; performance may degrade outside this range due to condenser heat rejection limitations.
Are calibration certificates provided with shipment?
Factory calibration reports are included; NIST-traceable third-party certification is available as a value-added service upon request.