Yoyilab MJ-100-I Mold Incubator

Overview

The Yoyilab MJ-100-I Mold Incubator is a precision-engineered, forced-air thermal chamber designed specifically for controlled cultivation of filamentous fungi, yeasts, and other moisture-sensitive microorganisms under standardized environmental conditions. It operates on the principle of active air circulation combined with PID-regulated heating to maintain stable, reproducible temperature profiles across its 100 L stainless-steel working chamber. Unlike general-purpose incubators, the MJ-100-I incorporates structural and functional adaptations critical for mycological work—including UV sterilization of recirculated air, reinforced thermal insulation, and optional humidity control (in II-series variants). Its operational range (0–65 °C) supports both psychrophilic and thermotolerant mold strains, while its ±1.5 °C uniformity at 25 °C aligns with ISO 21527-1:2008 requirements for fungal enumeration in food and environmental samples.

Key Features

• Robust dual-door construction with double-layered glass and silicone gasketing—minimizes thermal leakage during observation without disturbing internal equilibrium
• Electropolished 304 stainless-steel interior with radius-corner geometry and adjustable, removable shelves for complete cleanability and compliance with GLP cleaning validation protocols
• Integrated 254 nm UV-C lamp mounted in the ceiling plenum, automatically activated during idle cycles to reduce airborne microbial load and mitigate cross-contamination risk in sequential cultures
• Microprocessor-based temperature controller with 0.1 °C resolution, real-time display of setpoint, actual chamber temperature, and elapsed time; includes programmable timer (1–9999 minutes)
• Power-fail recovery function with non-volatile memory—retains all user-defined parameters including temperature setpoint, timer status, and alarm thresholds after interruption
• Over-temperature safety cutoff with independent hardware limiter (separate from main controller) meeting IEC 61000-4-2 immunity standards
• Four-position castor system with dual-locking mechanism—enables precise positioning and vibration isolation on laboratory floors

Sample Compatibility & Compliance

The MJ-100-I accommodates standard microbiological sample formats including Petri dishes (up to 150 mm diameter), slant tubes, multi-well plates, and Erlenmeyer flasks up to 1 L volume. Its forced convection airflow ensures consistent heat transfer even with densely stacked or partially covered vessels. The unit complies with key international testing frameworks: ASTM D3273 (Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber), ISO 846 (Plastics—Evaluation of the Effect of Microorganisms), and USP / microbial limits testing environments. All electrical components conform to CE marking directives (2014/30/EU EMC and 2014/35/EU LVD), and the cabinet structure meets IP20 ingress protection classification per IEC 60529.

Software & Data Management

While the base MJ-100-I model utilizes a standalone 5.7-inch monochrome LCD interface with push-button navigation, optional RS485 communication port (available as accessory) enables integration into centralized lab monitoring systems via Modbus RTU protocol. When paired with Yoyilab’s optional data logging software, users can export timestamped temperature logs compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and immutable record archiving. The system supports configurable alarm notifications (visual and relay output) for deviations exceeding user-specified thresholds, facilitating adherence to ISO/IEC 17025 clause 7.7 on equipment monitoring.

Applications

• Quantitative mold enumeration in food, feed, pharmaceutical raw materials, and indoor air sampling media per ISO 7954 and AOAC 997.05
• Stability testing of antifungal agents and preservative efficacy studies (challenge testing) under controlled humidity and temperature gradients
• Cultivation of Aspergillus, Penicillium, Cladosporium, and Fusarium species for morphological identification and secondary metabolite production
• BOD₅ incubation for wastewater analysis when configured with dedicated BOD sockets (optional accessory)
• Accelerated aging studies evaluating material resistance to biodegradation under elevated humidity and temperature stress
• Validation of sterilization cycle effectiveness in HVAC ductwork and cleanroom surface sampling protocols

FAQ

Does the MJ-100-I support humidity control?
No—the MJ-100-I variant is a dry-heat incubator. Humidity regulation is available only in the MJ-100-II series, which integrates a capacitive RH sensor and steam generator module.
Is the UV lamp interlocked with the door switch?
Yes—the UV-C irradiation system deactivates automatically upon door opening to prevent operator exposure, complying with IEC 62471 photobiological safety classification.
Can this incubator be used for cell culture applications?
It is not recommended for mammalian cell culture due to lack of CO₂ regulation, HEPA filtration, or humidity stabilization—these require specialized CO₂ incubators meeting ISO 13408-3 sterility assurance levels.
What calibration documentation is provided?
Each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China), covering temperature accuracy verification at three points (15 °C, 30 °C, and 50 °C) under no-load conditions.
Are replacement shelves and UV lamps available as spare parts?
Yes—stainless-steel shelves (part #MJ-SH-100), UV-C lamps (G25 T8, 15W, 254 nm), and silicone door gaskets are stocked and shipped globally within 5 business days.