MingJie MJ-Series Microbial Incubators – LCD-Display, Eco-Friendly Refrigerant (R134a/R406a), Programmable Temperature & Humidity Control (Models: MJ-70-I, MJ-150-I, MJ-250-I, MJ-300-I)

Overview

The MingJie MJ-Series Microbial Incubators are precision-engineered environmental chambers designed for reliable, long-term cultivation and maintenance of fungi, bacteria, yeasts, and other sensitive microorganisms in research, clinical, pharmaceutical, and industrial laboratories. Built upon a robust thermal management architecture, these incubators utilize advanced PID temperature control combined with an eco-conscious refrigeration system based on R134a or R406a—zero-ozone-depletion-potential (ODP) alternatives compliant with international environmental directives including the Montreal Protocol and EU F-Gas Regulation. The chamber employs forced-air convection via a JAKEL-brand centrifugal fan and a scientifically optimized airflow path to ensure ≤±0.5 °C temperature uniformity across the working volume—even under continuous load conditions. Designed for GLP-aligned workflows, each unit integrates dual safety layers: real-time monitoring of internal temperature and an independent mechanical/thermal limiter that interrupts power upon deviation beyond user-defined thresholds.

Key Features

• Large backlit LCD display showing simultaneous readouts of setpoint, actual temperature, elapsed time, and humidity (if equipped)—all navigated via intuitive menu-driven interface.
• Mirror-finish 304 stainless steel interior with fully rounded corners and adjustable shelving (3 standard trays included) for seamless cleaning and contamination control per ISO 14644 cleanroom-compatible protocols.
• Eco-refrigeration system using R134a or R406a refrigerants—certified non-ozone-depleting and low-global-warming-potential (GWP), supporting institutional sustainability compliance reporting.
• Top-mounted 254 nm UV-C germicidal lamp integrated into the air recirculation path, delivering continuous decontamination of airborne microbes without requiring manual intervention.
• Dual-stage thermal protection: primary PID-controlled heating/cooling circuit plus a redundant electromechanical over-temperature cutoff with visual and audible alert.
• Optional programmable multi-segment controller enabling up to 15 stages × 30 steps, supporting complex biological assays such as thermal ramping for spore germination studies or circadian rhythm modeling.

Sample Compatibility & Compliance

The MJ-Series accommodates a broad range of biological sample formats—including Petri dishes, culture flasks (up to T225), multiwell plates, and custom bioreactor vessels—within its uniformly conditioned workspace. All models meet core requirements for BOD5 testing (ASTM D5210, ISO 5815-1), microbial limit testing (USP , EP 2.6.12), and stability-indicating storage per ICH Q1A(R2). The optional humidity control module (designated “II” variant) maintains relative humidity within ±3% RH accuracy—validated for filamentous fungal growth studies where moisture gradients critically affect sporulation kinetics. Units comply with EN 61010-1 (safety) and EN 61326-1 (EMC), and support 21 CFR Part 11-compliant data integrity when paired with validated RS485-to-PC software solutions.

Software & Data Management

While standalone operation requires no external software, optional connectivity modules enable full traceability and audit readiness. The RS485 interface supports Modbus RTU protocol for integration into centralized Lab Information Management Systems (LIMS) or SCADA platforms. USB output permits direct export of timestamped temperature/humidity logs (CSV format) to portable media for offline analysis. Optional bundled software provides graphical trend visualization, alarm event logging with operator ID tagging, and automated PDF report generation—fully aligned with GLP documentation standards. All recorded data include metadata: instrument ID, sensor calibration status, environmental ambient conditions (recorded at startup), and firmware revision level.

Applications

• Standardized mycological culture for food safety testing (ISO 21527-1, AOAC 997.01)
• BOD5 determination in wastewater treatment labs (EPA Method 405.1)
• Pharmaceutical stability testing of raw materials under accelerated conditions (ICH Q1A)
• Plant tissue culture initiation and callus propagation (e.g., Arabidopsis thaliana, rice cultivars)
• Validation of sterilization cycle efficacy using biological indicators (e.g., Geobacillus stearothermophilus spores)
• Environmental simulation for climate-resilience studies in agricultural microbiology

FAQ

What refrigerants are used in the MJ-Series incubators, and why are they environmentally preferable?
R134a and R406a are hydrofluorocarbon (HFC) and zeotropic blend refrigerants, respectively—both classified as zero-ozone-depletion substances. They replace legacy CFCs and HCFCs banned under the Montreal Protocol and align with EU Regulation (EU) No 517/2014 on fluorinated greenhouse gases.
Is humidity control available on all MJ-Series models?
Humidity regulation is standard only on “II”-designated variants (e.g., MJ-150-II). Base “I” models (e.g., MJ-150-I) provide temperature-only control; humidity functionality requires hardware upgrade and dedicated sensor calibration.
Can the incubator be validated for GxP environments?
Yes—when configured with optional data logging, electronic signatures, and audit trail features, the MJ-Series supports IQ/OQ/PQ execution per ASTM E2500 and Annex 11 guidelines. Full validation documentation packages are available upon request.
What is the maximum allowable ambient temperature for stable operation?
For rated performance (±0.5 °C uniformity), ambient conditions must remain between 15–30 °C and ≤70% RH. Operation above 30 °C may extend compressor duty cycle and reduce long-term reliability.
Are third-party calibration certificates available?
NIST-traceable calibration certificates (temperature, humidity if applicable) are offered as a value-added service, including as-found/as-left data and uncertainty budgets per ISO/IEC 17025 requirements.