DRETOP ZMJ-70-I Mold Incubator

Overview

The DRETOP ZMJ-70-I Mold Incubator is a precision-engineered, forced-air laboratory incubator designed specifically for the cultivation and maintenance of filamentous fungi, yeasts, and other eukaryotic microorganisms under controlled thermal conditions. Unlike general-purpose incubators, the ZMJ series incorporates structural and thermal design features optimized for mycological applications—particularly those requiring stable, uniform temperature profiles over extended durations (e.g., spore germination assays, colony isolation, strain preservation, and BOD-related microbial activity studies). It operates on the principle of active air circulation via a high-efficiency axial fan and a thermally balanced internal duct system, ensuring rapid thermal equilibration and minimal spatial gradient across the chamber volume. While humidity control is not integrated in the ZMJ-70-I variant (distinguishing it from the II-series or F-series models), its robust thermal architecture makes it suitable for experiments where ambient relative humidity remains stable or is externally managed—for instance, in dedicated mycology labs equipped with independent humidification chambers or environmental rooms.

Key Features

• Microprocessor-based P.I.D. temperature controller with LCD display, offering real-time monitoring of setpoint, actual temperature, and elapsed time; includes over-temperature alarm with audible/visual alert and automatic cut-off.
• Forced convection system utilizing an energy-efficient贯流 (axial-flow) fan and engineered internal airflow channels to achieve ±1 °C uniformity (empty, at 25 °C) and ±0.5 °C stability—validated per ISO 15184 and ASTM E2923 protocols for incubator performance verification.
• Stainless steel interior chamber (304 grade) with fully removable, height-adjustable stainless steel shelves—designed for autoclave compatibility, chemical resistance, and seamless decontamination between runs.
• Dual-door observation window: outer magnetic door seal and inner tempered glass panel minimize thermal leakage while enabling non-intrusive sample monitoring without disturbing chamber equilibrium.
• Structural integrity reinforced by cold-rolled steel outer casing and rounded internal corners (R-chamfered joints) to eliminate dust traps and facilitate cleaning—compliant with GLP facility hygiene requirements.
• Integrated UV germicidal lamp (254 nm) as standard, programmable for periodic sterilization cycles to reduce airborne fungal spores and surface bioburden during idle periods.
• Four-position leveling feet with dual-mode operation: swivel casters for repositioning + locking screws for vibration-dampened stationary use—critical for long-term culture stability in shared lab environments.

Sample Compatibility & Compliance

The ZMJ-70-I accommodates standard microbiological consumables including Petri dishes (up to 150 mm diameter), slant tubes, multi-well plates, and culture flasks—configured across two adjustable stainless steel shelves. Its 70 L working volume supports moderate-throughput workflows typical in academic teaching labs, QC microbiology units, and R&D departments conducting ASTM G21-compliant fungal resistance testing of polymers, coatings, and electronic enclosures. The unit meets CE marking requirements for electrical safety (EN 61010-1) and electromagnetic compatibility (EN 61326-1). Though not certified to IEC 60601-1, its design adheres to risk-mitigated engineering practices aligned with ISO 14971 for laboratory equipment. No humidity control implies exclusion from applications requiring defined RH gradients (e.g., USP microbial enumeration under variable moisture); however, it satisfies ISO 8573-1 Class 4 compressed air testing support roles when used alongside external desiccation or humidification modules.

Software & Data Management

The ZMJ-70-I employs embedded firmware without external PC connectivity as standard. All operational parameters—including temperature setpoint, alarm thresholds, timer duration (1–9999 minutes), and UV cycle scheduling—are configured locally via tactile push-button interface. The controller retains user-defined settings through power interruption (non-volatile memory), supporting continuity in GLP-regulated environments where audit trails are maintained manually. Optional RS485 serial interface (available as add-on) enables integration into centralized building management systems (BMS) or LabVantage/LabWare LIMS via Modbus RTU protocol—supporting timestamped event logging (start/stop, alarm triggers, door openings) for 21 CFR Part 11-compliant recordkeeping when paired with validated third-party software. No onboard data storage or graphical trending is provided; external chart recorders or USB data loggers may be deployed via the optional 1/2″ threaded test port.

Applications

• Fungal growth kinetics studies (e.g., Aspergillus niger, Penicillium chrysogenum) under standardized thermal conditions per ISO 13788 Annex C.
• Biochemical oxygen demand (BOD₅) incubation for wastewater analysis in accordance with APHA Standard Methods 5210B.
• Strain archiving and viability assessment of mold isolates for culture collections (e.g., ATCC, DSMZ pre-screening).
• Accelerated aging tests evaluating material susceptibility to fungal colonization (ASTM D3273, MIL-STD-810H Method 508.6).
• Environmental simulation for pharmaceutical stability testing—specifically thermal stress phases where humidity is decoupled and controlled separately.
• Teaching laboratories performing basic mycology labs, antibiotic sensitivity screening, or industrial fermentation starter propagation.

FAQ

Does the ZMJ-70-I include humidity control?
No. The ZMJ-70-I is a temperature-only incubator. Humidity regulation is available only in the ZMJ-II (integrated ultrasonic humidifier) and ZMJ-F (refrigerated dehumidification) variants.
Is the UV lamp programmable?
Yes. The built-in 254 nm UV-C lamp can be scheduled independently of temperature operation using the timer function—ideal for overnight sterilization cycles.
Can this incubator be used for mammalian cell culture?
Not recommended. Absence of CO₂ control, humidity regulation, and HEPA filtration excludes it from sterile cell culture applications per ISO 5 cleanroom standards.
What safety certifications does it carry?
CE-marked to EN 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and EN 61326-1 (EMC for Laboratory Instruments).
Is calibration documentation included?
A factory calibration certificate (traceable to NIM, China) is supplied with each unit. NIST-traceable recalibration services are available upon request.