Yetuo MJ-300F-I Mold Incubator

Overview

The Yetuo MJ-300F-I Mold Incubator is a purpose-engineered, refrigerated and heated environmental chamber designed specifically for the controlled cultivation of filamentous fungi, yeasts, and other aerobically growing microorganisms requiring precise temperature regulation and contamination mitigation. Unlike general-purpose incubators, this model integrates a dedicated ultraviolet (UV-C) germicidal lamp—standard equipment—to suppress airborne spore proliferation and minimize cross-contamination during extended fungal growth cycles. Its operational temperature range spans from 0°C to 65°C, enabling both low-temperature psychrophilic studies and elevated-temperature thermotolerant strain propagation. The unit employs a high-efficiency, non-ozone-depleting R134a refrigerant compressor coupled with PID-controlled resistive heating, ensuring stable thermal profiles across its 300 L working volume. Constructed for laboratory durability and regulatory compliance, the MJ-300F-I meets foundational design expectations for GLP-aligned microbiological workflows in academic, pharmaceutical, and public health laboratories.

Key Features

• Stainless-steel mirror-finish interior with seamless semi-circular corners—optimized for sterility maintenance and routine decontamination using ethanol, hydrogen peroxide vapor, or quaternary ammonium agents.
• Intelligent microprocessor-based controller with large backlit LCD display; simultaneously shows setpoint and real-time chamber temperature with 0.1°C resolution and programmable timer (1–9999 minutes).
• Active air circulation system featuring a variable-speed centrifugal fan and optimized duct geometry—ensures ±1.5°C uniformity (measured at nine points per IEC 61000-4-2 test protocol at 25°C reference).
• Integrated 254 nm UV-C lamp (operable independently of thermal control) for periodic irradiation of internal surfaces, reducing viable mold spore load between experimental runs.
• Dual-door configuration: outer tempered glass observation window with anti-fog coating + inner steel-reinforced insulated door—minimizes thermal leakage and enables non-intrusive monitoring without compromising chamber integrity.
• Redundant safety architecture including independent mechanical over-temperature limiter (field-adjustable cutoff threshold), current overload protection, and audible/visual fault indication for critical anomalies.

Sample Compatibility & Compliance

The MJ-300F-I accommodates standard microbiological sample formats—including Petri dishes (up to 150 mm diameter), multi-well plates, slant tubes, Erlenmeyer flasks (up to 2 L), and custom bioreactor vessels—on four vertically adjustable, load-rated stainless-steel shelves. Its interior geometry supports ISO 14644-1 Class 7 cleanroom-compatible operation when deployed within controlled environments. While not certified to ISO/IEC 17025 for calibration traceability, the incubator’s thermal performance aligns with ASTM E2792-21 (Standard Practice for Performance Testing of Environmental Chambers) and supports adherence to USP <61>/<62>, CLSI M22-A3, and EU GMP Annex 1 requirements for microbial enumeration and identification workflows. All electrical components comply with IEC 61010-1:2010 for laboratory equipment safety.

Software & Data Management

This standalone incubator operates without proprietary software dependency. Temperature setpoints, timer values, and alarm thresholds are configured locally via tactile membrane keypad. Real-time temperature logging is not embedded; however, the unit features an analog voltage output (0–5 V DC) proportional to internal sensor reading—compatible with third-party data acquisition systems (e.g., National Instruments DAQ, LabVIEW, or Eurotherm controllers) for continuous recording and 21 CFR Part 11-compliant audit trails when integrated with validated software platforms. Optional RS-485 Modbus RTU interface (available upon request) enables centralized monitoring in multi-unit lab infrastructures.

Applications

• Standardized mycological assays per ISO 21527-1/2 (enumeration of yeasts and molds in food and animal feeding stuffs).
• BOD₅ incubation per APHA Standard Methods 5210B, where stable 20°C ±1°C conditions are mandated for biochemical oxygen demand assessment.
• Fungal preservation and subculturing in clinical microbiology labs adhering to CLSI M51-A guidelines.
• Environmental monitoring of HVAC systems and cleanrooms per ISO 14698-1, utilizing settle plates and contact plates exposed under controlled thermal stress.
• Plant pathology research involving phytopathogenic fungi (e.g., Fusarium, Aspergillus, Penicillium) under defined hygrothermal regimes.
• Validation of disinfectant efficacy against resilient fungal spores (e.g., Aspergillus niger) per EN 13697 and ASTM E2197.

FAQ

Does the MJ-300F-I support humidity control?
No—this is a temperature-only incubator. Relative humidity is unregulated and will equilibrate with ambient lab conditions unless external humidification/dehumidification systems are integrated.
Is the UV lamp ozone-generating?
No—the installed UV-C source emits at 254 nm and is explicitly ozone-free, complying with IEC 62471 photobiological safety classification for Group 1 (exempt) risk.
Can the unit be validated for IQ/OQ/PQ protocols?
Yes—its mechanical design, sensor layout, and thermal stability profile permit full qualification per GAMP 5 guidance; users must supply calibrated reference probes and documented SOPs for execution.
What is the maximum shelf loading capacity?
Each of the four shelves supports up to 15 kg uniformly distributed load; total internal payload should not exceed 45 kg to maintain airflow integrity and thermal uniformity.
Is service documentation available in English?
Yes—full English-language operation manual, electrical schematics, and spare parts catalog are provided with shipment and accessible via Yetuo’s authorized distributor portal.