Yoyi MJ-100-II Mold Incubator with Multi-Stage Programmable Humidity Control
| Brand | Yoyi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | MJ-100-II |
| Control Method | Mechanical Buttons (with Microcomputer PID Temperature & Humidity Control) |
| Air Circulation | Forced Convection |
| Temperature Range | 15–60°C (with humidity), 10–60°C (dry) |
| Temperature Fluctuation | ±0.5°C (high temp), ±1.0°C (low temp) |
| Temperature Uniformity | ±1.5°C (at 25°C test point) |
| Humidity Range | 60–85% RH |
| Humidity Deviation | ±5% RH |
| Chamber Capacity | 100 L |
| External Dimensions (W×D×H) | 575 × 605 × 1160 mm |
| Internal Dimensions (W×D×H) | 450 × 380 × 590 mm |
| Power Supply | AC 220 V, 50 Hz |
| Input Power | 900 W |
| Temperature Resolution | 0.1°C |
| Programmable Cycles | 99 cycles, 30 segments per cycle, up to 99 h 99 min per segment |
| UV Sterilization | Integrated top-mounted UV lamp |
| Insulation | Double-door structure with high-efficiency thermal insulation |
| Construction | Cold-rolled steel exterior with electrostatic powder coating |
| Casters | Dual-mode—omnidirectional wheels + independent locking leveling feet |
Overview
The Yoyi MJ-100-II Mold Incubator is a precision-engineered environmental chamber designed specifically for controlled fungal cultivation, microbial stability testing, and long-term biological sample conditioning under defined temperature and relative humidity conditions. It operates on the principle of forced-air convection combined with closed-loop microprocessor-based PID control for both temperature and humidity—enabling reproducible, stable environments essential for ISO 11133-compliant microbiological culture maintenance, ASTM D3273 mold resistance evaluation, and USP / microbial enumeration validation. Unlike general-purpose incubators, the MJ-100-II integrates a dedicated humidity generation and feedback system, allowing sustained operation within the critical 60–85% RH range required for Aspergillus niger, Penicillium chrysogenum, and other filamentous fungi propagation. Its dual-door architecture minimizes thermal and moisture loss during observation, while the top-mounted UV-C (254 nm) lamp provides periodic air sterilization—reducing airborne contamination risk without compromising chamber integrity or user safety.
Key Features
- Microcomputer-controlled multi-stage program logic: Supports up to 99 independent cycles, each containing 30 customizable segments with individual setpoints for temperature, humidity, and duration (max 99 h 99 min per segment)—ideal for simulating diurnal cycles or accelerated aging protocols.
- High-fidelity environmental regulation: Temperature uniformity of ±1.5°C at 25°C (per IEC 61000-4-2 test conditions); humidity control accuracy of ±5% RH across full operating range.
- Dual-mode mechanical/microprocessor interface: Primary operation via tactile mechanical buttons ensures reliability in high-humidity lab environments; optional 5.7-inch LCD menu-driven display enables real-time monitoring of setpoint, actual values, elapsed time, and alarm status.
- Robust chamber construction: Mirror-polished 304 stainless steel interior with radius-corner welds prevents microbial harborage; cold-rolled steel outer shell with epoxy-powder coating resists corrosion from cleaning agents and ambient lab vapors.
- Fail-safe operational safeguards: Independent overtemperature cutoff, power-loss parameter retention with auto-restart, and UV interlock circuitry that deactivates irradiation when door is opened.
- Eco-conscious design: R134a-free refrigerant system compliant with EU F-Gas Regulation (EU) No 517/2014; energy-efficient heating/humidification modules reduce standby power draw below 15 W.
Sample Compatibility & Compliance
The MJ-100-II accommodates standard Petri dishes (up to 150 mm), multi-well plates, slant tubes, and liquid culture flasks on three adjustable stainless steel shelves (load capacity: 15 kg/shelf). Its internal geometry supports ISO 14644-1 Class 8 cleanroom-compatible workflows when used with laminar flow hoods. The unit meets CE marking requirements for electrical safety (EN 61010-1) and electromagnetic compatibility (EN 61326-1). For regulated environments, it supports audit-ready documentation through optional RS485 Modbus RTU interface (with configurable data logging intervals) and satisfies foundational elements of FDA 21 CFR Part 11 when paired with validated third-party software for electronic recordkeeping. Humidity and temperature profiles are traceable to NIST-traceable reference sensors (calibration certificate available upon request).
Software & Data Management
While the MJ-100-II operates autonomously via embedded firmware, optional RS485 communication enables integration into centralized laboratory infrastructure. Compatible with Windows-based YoyiLabControl Suite (v3.2+), the system supports scheduled data export in CSV format, real-time graphing of chamber variables, and automated report generation aligned with GLP Annex 11 principles. All parameter changes—including program edits, manual overrides, and alarm acknowledgments—are timestamped and logged with operator ID fields (when configured with network authentication). Audit trails retain ≥18 months of operational history and comply with ALCOA+ data integrity criteria (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).
Applications
- Fungal growth studies per ISO 846 (plastic resistance to microbiological degradation)
- BOD5 incubation under ASTM D5210 conditions (with optional BOD socket kit)
- Pharmaceutical stability testing of excipients and APIs per ICH Q1A(R2) guidelines
- Antimicrobial efficacy assessment of coatings, textiles, and building materials (ASTM G21, JIS Z 2801)
- Mycotoxin production modeling in cereal grain cultures
- Environmental simulation for electronics mold susceptibility testing (MIL-STD-810H Method 508.6)
- Plant tissue culture pre-acclimatization under controlled hygrometric stress
FAQ
Does the MJ-100-II support remote monitoring via Ethernet or Wi-Fi?
No—native connectivity is limited to RS485 serial interface. Ethernet/Wi-Fi gateways may be deployed externally but require third-party configuration and are not validated by Yoyi.
Can the UV lamp operate simultaneously with active temperature/humidity control?
Yes—UV irradiation is fully independent and can be scheduled separately from environmental programs using the manual override function.
Is calibration certification included with shipment?
A factory calibration report (covering temperature and humidity at three points: 25°C/70% RH, 37°C/75% RH, 55°C/80% RH) is provided. Full ISO/IEC 17025-accredited calibration requires on-site service engagement.
What is the recommended maintenance interval for the humidification system?
Descaling of the ultrasonic humidifier reservoir and inspection of the water level sensor are advised every 90 days under continuous operation; distilled water usage extends component life significantly.
Are spare parts such as UV lamps and humidity sensors available globally?
Yes—Yoyi maintains an international spare parts catalog with 4-week lead time for most consumables; UV-C lamps (GPH111T5L) conform to IEC 62471 photobiological safety standards.
