Yoyi MJ-500-I 500L Forced-Air Mold Incubator for Microbial and Cell Culture

Overview

The Yoyi MJ-500-I is a large-capacity, forced-air mold incubator engineered for stable, reproducible environmental control in microbiological and eukaryotic cell culture applications. Designed to meet the stringent demands of BOD testing, fungal propagation, bacterial isolation, plant tissue culture, and long-term microbial preservation, this incubator operates on a robust convection-based thermal management principle—ensuring uniform heat distribution across its 500 L working chamber. Its operational temperature range (0–65 °C) supports both mesophilic and thermotolerant strain cultivation, while the integrated UV sterilization system mitigates airborne contamination risks during extended incubation cycles. The unit complies with foundational laboratory equipment standards for biological safety and thermal stability, including ISO 13485-aligned manufacturing practices and structural conformity to IEC 61010-1 for electrical safety in laboratory environments.

Key Features

• Forced-air convection system with adjustable fan speed and optimized airflow ducting to minimize thermal stratification and ensure ±1.5 °C uniformity (at 25 °C reference point)
• Microcomputer-controlled PID temperature regulation with 0.1 °C resolution, ±0.5 °C high-temperature stability, and programmable timer (1–9999 minutes)
• Double-door structure with high-efficiency insulation: outer door for observation, inner tempered glass door to preserve chamber integrity during visual inspection
• Mirror-finish stainless steel interior with radius-corner design for seamless cleaning and reduced microbial adhesion; adjustable stainless steel shelving (standard configuration: 3 trays)
• Top-mounted UV-C (254 nm) lamp with manual activation switch and safety interlock—validated for >99.9% reduction of airborne Aspergillus niger, Candida albicans, and Escherichia coli aerosols after 30 min exposure
• Four-position leveling feet with dual-function mechanism: omnidirectional casters for mobility + independent locking screws for vibration-dampened operation
• Power-loss recovery protocol: retains set parameters and resumes operation post-interruption without manual reconfiguration
• Over-temperature deviation alarm with independent hardware cutoff circuit (non-software-dependent), compliant with GLP requirement for failure-mode transparency

Sample Compatibility & Compliance

The MJ-500-I accommodates standard microbiological formats—including Petri dishes (up to 150 mm), multi-well plates (6–96-well), Erlenmeyer flasks (up to 2 L), and roller bottles—without compromising airflow or thermal homogeneity. Its chamber geometry permits simultaneous processing of heterogeneous sample types under identical environmental conditions, supporting ASTM D3273 (Resistance to Fungal Growth on Plastic Materials) and ISO 846 (Plastics—Evaluation of Resistance to Fungal Growth) test protocols. While not classified as a Class II biosafety cabinet, its UV decontamination cycle and sealed gasketed doors align with CLSI M22-A3 recommendations for non-sterile but contamination-controlled incubation spaces. The unit’s construction materials comply with RoHS Directive 2011/65/EU and uses R134a refrigerant-free cooling architecture (confirmed “F”-series designation), meeting EU F-Gas Regulation (EU) No 517/2014 thresholds.

Software & Data Management

The MJ-500-I features a 5.7-inch monochrome LCD interface supporting menu-driven parameter entry, real-time display of setpoint/actual temperature, elapsed time, and alarm status. Though natively non-networked, optional RS485 communication module (sold separately) enables integration into centralized lab monitoring systems via Modbus RTU protocol. When paired with supplied PC software, users can log timestamped temperature traces, export CSV-formatted datasets, and generate audit-ready reports compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user access levels, and immutable audit trails for critical parameters. Optional programmable controller upgrade adds 99-cycle capability with 30 segments per cycle—enabling complex diurnal/thermal ramp profiles required for phytopathogen development studies or spore germination kinetics.

Applications

• BOD₅ incubation per APHA Standard Methods 5210B, maintaining strict 20 ± 1 °C compliance over 5-day periods
• Fungal culture maintenance for *Penicillium*, *Aspergillus*, and *Fusarium* spp., including sporulation induction under controlled humidity gradients (when equipped with optional humidity module)
• QC/QA stability testing of pharmaceutical excipients and biologics under ICH Q1A(R2) intermediate storage conditions
• Plant callus induction and embryogenic culture in tissue culture labs requiring precise, vibration-isolated thermal environments
• Environmental isolate enrichment from soil/water matrices using selective temperature regimes (e.g., 37 °C for fecal coliforms, 44.5 °C for thermotolerant *E. coli*)
• Validation of antimicrobial efficacy against mold contaminants in packaging materials per ISO 22196

FAQ

Does the MJ-500-I support humidity control?
No—the base MJ-500-I model is configured for temperature-only operation. Humidity regulation (60–85% RH, ±5% RH accuracy) is available exclusively on the MJ-500-II variant, which includes a dedicated ultrasonic humidifier, hydrophilic humidity sensor, and condensate management system.
Is calibration documentation provided with shipment?
Yes—each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China) standards, covering temperature uniformity and fluctuation verification at three spatial points (center, front-left, rear-right) per ISO 17025 guidelines.
Can the UV lamp be operated simultaneously with heating?
Yes—UV sterilization and thermal conditioning operate independently; however, UV exposure is recommended only during idle periods or between culture runs to prevent DNA damage to active cultures.
What safety certifications does the MJ-500-I hold?
It carries CE marking per EN 61010-1:2010, conforms to GB 4793.1–2007 (Chinese equivalent of IEC 61010-1), and meets electromagnetic compatibility requirements per EN 61326-1:2013.
Are replacement shelves and UV lamps available as spare parts?
Yes—stainless steel trays (part no. MJ-SH-700), UV-C tubes (15 W, G15T8 base, part no. MJ-UV15), and door gaskets are stocked and ship globally within 5 business days.