DRETOP ZMJ Series Mold Incubator

Overview

The DRETOP ZMJ Series Mold Incubator is a precision-engineered environmental chamber designed specifically for the controlled cultivation of filamentous fungi, yeasts, and other hygrophilic microorganisms requiring stable temperature and humidity conditions. Unlike general-purpose incubators, the ZMJ Series integrates dual-mode humidity management—capable of both active humidification (within 15–45 °C) and non-humidified operation (10–45 °C)—enabling reproducible mycological growth across diverse strain types and experimental protocols. Its operational principle relies on PID-controlled refrigeration and resistive heating, coupled with intelligent forced-air convection via axial贯流 (cross-flow) fans and optimized internal air ducting. This architecture ensures rapid thermal equilibration and minimizes vertical/horizontal gradients—critical for uniform sporulation, colony morphology assessment, and long-term culture stability in BOD testing, microbial shelf-life studies, and antifungal efficacy screening.

Key Features

• Microprocessor-based P.I.D. temperature controller with 0.1 °C resolution, real-time digital display, and programmable over-temperature alarm (adjustable setpoint)
• Large-format touchscreen interface supporting multi-parameter visualization—including current temp/humidity, elapsed time, and system status—with intuitive navigation and password-protected parameter lock
• Stainless steel interior chamber (304 grade) with removable, height-adjustable stainless steel shelves; seamless welded corners and smooth surfaces facilitate ISO 14644-compliant cleaning and autoclave-compatible disinfection
• Dual-door observation window: inner tempered glass panel + outer magnetic door seal—optimized for thermal insulation and condensation resistance during high-humidity operation
• ECO-certified R134a or R600a refrigerant (F-series models); modular compressor assembly with built-in start-delay and off-cycle interval protection to extend service life under continuous duty
• Integrated UV-C germicidal lamp (254 nm), programmable cycle timer, and HEPA-filtered recirculation path—validated for reduction of airborne fungal spores and bacterial contaminants per ISO 14644-1 Class 8 requirements
• Four-point leveling feet with locking casters (two fixed, two swivel); ergonomic chassis design compliant with IEC 61000-6-3 EMC emission standards
• Power-fail recovery function with non-volatile memory retention—preserves setpoints, runtime logs, and alarm history during grid interruption or unexpected shutdown

Sample Compatibility & Compliance

The ZMJ Series accommodates standard microbiological vessels including Petri dishes (up to 150 mm), slant tubes, Erlenmeyer flasks (≤2 L), and multi-well plates. Its humidity control architecture supports ASTM D3273 (Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber) and ISO 846 (Plastics—Evaluation of the Action of Fungi). The incubator meets GLP documentation requirements through optional RS485 Modbus RTU output (compatible with LabArchives, LabVantage, and limsLink), enabling traceable audit trails for FDA 21 CFR Part 11–compliant environments when paired with validated software. All electrical components conform to GB 4793.1–2019 (equivalent to IEC 61010-1) safety standards for laboratory equipment.

Software & Data Management

While the base unit operates via embedded firmware, optional accessories enable advanced data governance: a programmable logic controller (PLC) module supports up to 30-step temperature/humidity ramp-soak profiles with dwell timing (1–9999 min per segment); an RS485 serial interface permits bidirectional communication with SCADA systems or custom Python/Node-RED scripts for automated logging; and a thermal printer module generates timestamped hardcopy reports compliant with ISO/IEC 17025 calibration record retention policies. Firmware updates are delivered via USB port with SHA-256 signature verification—ensuring integrity against unauthorized modification.

Applications

• Standardized mold susceptibility testing of building materials, textiles, and polymer composites per ASTM G21 and JIS Z 2911
• BOD₅ analysis in wastewater treatment labs where fungal metabolism contributes to oxygen demand quantification
• Cultivation of Aspergillus niger, Penicillium chrysogenum, and Trichoderma reesei for enzyme production and secondary metabolite screening
• Accelerated aging studies evaluating product degradation under tropical climatic profiles (e.g., 30 °C / 80% RH for 96 h)
• Validation of antifungal coatings and preservative efficacy in pharmaceutical excipients and cosmetic formulations
• Teaching laboratories conducting microbiology practicals on fungal life cycles, hyphal differentiation, and conidiogenesis

FAQ

Does the ZMJ Series support remote monitoring via Ethernet or Wi-Fi?
No—network connectivity is not natively integrated. Remote access requires third-party IoT gateways interfaced via RS485 Modbus.
Can the UV sterilization cycle be scheduled independently of incubation runs?
Yes—UV lamp activation is fully decoupled from temperature/humidity control and can be triggered manually or scheduled via the optional PLC module.
Is humidity control available across the full 0–65 °C temperature range?
No—humidification is only functional between 15–45 °C. Below 15 °C, condensation risk necessitates deactivation; above 45 °C, evaporation kinetics exceed system capacity.
What validation documentation is supplied with the instrument?
Each unit ships with a Factory Calibration Certificate (traceable to NIM, China), Electrical Safety Test Report (GB 4793.1), and Material Declaration per RoHS 2011/65/EU.
Are custom internal dimensions or shelf configurations available?
Yes—DRETOP offers OEM engineering services for modified chamber layouts, subject to minimum order quantity and lead-time confirmation.