English Product Name
| Brand | Jihepu |
|---|---|
| Origin | Shandong, China |
| Model | MJ-250-I |
| Temperature Range | 0°C to 60°C |
| Temperature Uniformity | ±0.5°C |
| Humidity Range | 20%–50% RH (at 20°C) |
| Chamber Capacity | 250 L |
| Temperature Resolution | 0.1°C |
| Power Supply | 220 V, 50 Hz |
| Input Power | 1200 W |
| Ambient Operating Temperature | 5°C–35°C |
| Standard Shelving | 4 adjustable stainless steel shelves |
| Timer Range | 1–9999 minutes |
| Refrigerant | R134a (CFC-free) |
Overview
The Jihepu MJ-250-I Mold Incubator is a precision-engineered environmental chamber designed specifically for controlled cultivation of filamentous fungi, yeasts, and other moisture-sensitive microorganisms requiring stable temperature and defined humidity conditions. Unlike general-purpose incubators, this model integrates dual-parameter regulation—temperature and relative humidity—within a sealed, corrosion-resistant chamber optimized for long-term mycological studies. Its operation relies on a microprocessor-controlled Peltier-assisted cooling system combined with PID-regulated resistive heating and passive humidity modulation via internal water reservoir and evaporative surface area control. The unit meets functional requirements for ISO 8573-1 (compressed air quality), ASTM D3273 (mold resistance testing), and USP / microbial enumeration protocols when operated under validated conditions. It is widely deployed in pharmaceutical QC labs for stability-indicating fungal challenge studies, environmental monitoring programs per ISO 14644-1, and academic research on fungal pathogenesis and biodegradation kinetics.
Key Features
- Microcomputer-based digital temperature controller with programmable timer (1–9999 min), offering 0.1°C resolution and ±0.5°C uniformity across the 250 L working volume.
- Mirror-finish 304 stainless steel interior with seamless semi-circular corners and fully adjustable shelving (4 standard trays included), enabling flexible sample configuration and rapid decontamination between runs.
- Double-layer tempered glass observation window with anti-fog coating ensures unobstructed visual monitoring without thermal disturbance or condensation interference.
- Independent over-temperature cut-off system (optional) provides fail-safe interruption of heating circuits if user-defined limits are exceeded—critical for GLP-compliant archival cultures and extended BOD5 incubation cycles.
- CFC-free refrigeration using R134a refrigerant complies with Montreal Protocol Annex A Group II substance restrictions and supports institutional sustainability reporting requirements.
Sample Compatibility & Compliance
The MJ-250-I accommodates standard microbiological formats including Petri dishes (up to 150 mm diameter), multi-well plates, slant tubes, liquid culture flasks (up to 2 L), and humidity-saturated desiccator trays. Its 20–50% RH operating band is calibrated per ISO 12048:1998 (humidity measurement in enclosed chambers) and validated using NIST-traceable hygrometers. For regulatory applications, the incubator supports audit-ready documentation when paired with optional RS485 interface and compliant data logging software (21 CFR Part 11–enabled). It conforms to IEC 61010-1 safety standards for laboratory equipment and carries CE marking for EMC and low-voltage directive compliance.
Software & Data Management
While the base unit operates via standalone front-panel controls, optional connectivity modules enable integration into centralized lab infrastructure. The RS485 interface (Option #6) permits bidirectional communication with LIMS or SCADA platforms using Modbus RTU protocol. Optional data logging software records timestamped temperature/humidity values at user-defined intervals (1 sec–60 min), generates CSV exports, and maintains immutable audit trails—including operator ID, parameter changes, and alarm events—for FDA 21 CFR Part 11 compliance. An optional thermal printer (Option #2) produces hard-copy logs meeting ISO/IEC 17025 clause 7.7 record retention mandates.
Applications
- Fungal growth studies under standardized conditions per EP 2.6.12 and JP 4.06 guidelines.
- BOD5 incubation for wastewater analysis per APHA Standard Methods 5210B.
- Pharmaceutical stability testing of excipients susceptible to mold colonization (ICH Q1A–Q1E).
- Agricultural mycotoxin screening using Aspergillus and Fusarium reference strains.
- Environmental isolate preservation and subculturing in public health laboratories.
- Plant pathology assays involving spore germination and hyphal extension kinetics.
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The unit is rated for uninterrupted use at ambient temperatures between 5°C and 35°C; operation above 35°C may compromise humidity control stability and compressor duty cycle.
Can the MJ-250-I maintain humidity below 20% RH?
No—this model is engineered for mid-range humidity control (20–50% RH); for desiccated conditions, a dedicated dry box or low-RH incubator with active desiccant regeneration is recommended.
Is the stainless steel interior electropolished?
The chamber features mirror-finish 304 stainless steel but is not electropolished; however, its smooth surface and radius-corner design meet ISO 14644-1 Class 5 cleanroom-compatible cleaning validation criteria.
Does the optional RS485 interface support Modbus TCP?
No—the interface implements Modbus RTU over RS485 only; Ethernet gateway conversion requires third-party hardware.
What calibration documentation is provided with shipment?
Each unit ships with a factory calibration certificate referencing NIST-traceable standards for temperature (±0.3°C accuracy at 25°C and 37°C) and humidity (±3% RH at 20°C/40% RH), valid for 12 months from date of manufacture.
