DRETOP ZMJ-350-I Mold Incubator

Overview

The DRETOP ZMJ-350-I Mold Incubator is a purpose-engineered environmental chamber designed specifically for the controlled cultivation of filamentous fungi, yeasts, and other eukaryotic microorganisms requiring stable thermal conditions without active humidity regulation. Unlike general-purpose incubators, this unit is optimized for mycological applications where precise, reproducible temperature maintenance—rather than relative humidity—is the primary operational requirement. It operates on a forced-air convection principle, utilizing a high-efficiency axial fan and an engineered internal airflow path to ensure rapid thermal equilibration and minimal spatial gradient across the 350 L working volume. The system employs a microprocessor-based P.I.D. temperature controller with real-time digital display, enabling accurate setpoint definition, continuous monitoring, and automatic compensation for ambient load variations. Its design adheres to fundamental principles of thermal dynamics in biological containment systems, prioritizing stability, repeatability, and long-term operational integrity under continuous laboratory use.

Key Features

• Intelligent digital touchscreen interface with full-screen parameter visualization and intuitive touch navigation—no physical buttons or rotary dials.
• P.I.D. temperature control algorithm delivering ±0.5 °C fluctuation and ±1 °C uniformity (measured empty at 25 °C), validated per ISO 17025-compliant calibration protocols.
• Structural integrity reinforced by cold-rolled steel outer casing and electropolished stainless-steel interior chamber; all internal surfaces are seamless-welded and fully autoclavable.
• Modular shelving system: three adjustable, removable stainless-steel shelves with reinforced edge supports—designed for load distribution up to 15 kg per shelf.
• Dual-door observation window: inner tempered glass panel with magnetic door seal and outer insulated acrylic layer—reducing heat loss and minimizing condensation during frequent access.
• Industrial-grade hermetic compressor with built-in start-delay protection, thermal overload cutoff, and refrigerant pressure monitoring—optimized for low-noise, energy-efficient operation using R134a (CFC-free) refrigerant.
• Integrated UV-C germicidal lamp (254 nm) mounted in the ceiling plenum, programmable for periodic sterilization cycles to suppress airborne microbial contamination between experiments.

Sample Compatibility & Compliance

The ZMJ-350-I accommodates standard microbiological vessels including Petri dishes (up to 150 mm diameter), culture flasks (up to 2 L), multiwell plates, and slant tubes. Its internal geometry permits unobstructed airflow around stacked racks and ensures uniform thermal exposure regardless of loading configuration. While not certified for GLP/GMP production environments, the unit meets essential functional criteria referenced in ASTM D3273 (Standard Test Method for Determining Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber) and supports test protocols aligned with ICH Q5C (Stability Testing of Biotechnological/Biological Products). All electrical components comply with IEC 61010-1 safety standards for laboratory equipment. No humidity control function is included; users requiring hygrothermal conditioning must integrate external humidification modules compliant with ISO 8573-1 Class 4 air quality specifications.

Software & Data Management

The incubator features embedded firmware supporting time-stamped temperature logging at user-defined intervals (1–60 min), with data retention capacity for ≥30 days of continuous recording. Optional RS485 serial interface enables integration into centralized lab management systems (e.g., LabVantage, STARLIMS) via Modbus RTU protocol. Audit trail functionality records operator actions—including setpoint changes, alarm acknowledgments, and UV cycle initiation—with timestamp and user ID (when paired with external authentication hardware). Data export is supported in CSV format via USB port; no cloud connectivity or proprietary software installation is required. Firmware updates are performed offline using signed binary files to maintain regulatory traceability under FDA 21 CFR Part 11 Annex 11 guidelines for electronic records.

Applications

This incubator serves as a core platform for BOD determination (APHA Standard Methods 5210B), fungal strain preservation (ATCC-recommended storage at 4–8 °C or sub-culturing at 25–30 °C), antimicrobial susceptibility testing per CLSI M38-A3, and accelerated aging studies for packaging materials per ASTM D4332. It is routinely deployed in academic mycology labs for sporulation induction, in pharmaceutical QC laboratories for environmental monitoring media incubation (ISO 14644-1 Class 5–8 cleanroom support), and in defense R&D facilities for evaluating material biodegradation under controlled thermal stress. Its temperature-only profile makes it especially suitable for protocols where humidity-induced condensation could compromise agar plate integrity or interfere with colony isolation.

FAQ

Does the ZMJ-350-I include humidity control?
No. This model is a temperature-only incubator. Humidity regulation is not implemented; models designated with “-II” or “-F” suffixes offer optional humidification subsystems.
Can the UV sterilization cycle be scheduled independently of temperature operation?
Yes. The UV lamp can be activated manually or programmed via timer settings while the chamber remains powered—even when temperature control is deactivated.
What is the maximum allowable ambient operating temperature?
The unit is rated for continuous operation in ambient environments up to 32 °C with ≤70% RH. Performance validation assumes installation in well-ventilated, non-sunlit laboratory spaces with ≥100 mm clearance on all sides.
Is third-party calibration documentation available?
Factory calibration certificates (traceable to NIM, China) are provided with each unit. Optional UKAS-accredited calibration services are available upon request through authorized DRETOP service partners.
Are spare parts and technical support accessible outside mainland China?
Yes. DRETOP maintains regional service hubs in Germany, Singapore, and the United States, offering multilingual technical documentation, extended warranty options, and component-level repair logistics under ISO 9001-certified service agreements.