MKN MKN-250B Biochemical Incubator

Overview

The MKN-250B Biochemical Incubator is a precision-controlled, dual-mode (heating and refrigeration) environmental chamber engineered for stable, long-term cultivation of biological samples under tightly regulated thermal conditions. Utilizing a hermetically sealed refrigeration circuit coupled with PTC heating elements and PID-based microprocessor control, the unit maintains setpoint stability across its operational range of 5–50 °C. Its design adheres to fundamental principles of convective heat transfer optimization—enabled by a top-mounted low-turbulence micro-circulation fan—and thermal mass buffering via high-density polyurethane foam insulation (≥60 mm thickness). The incubator is intended for non-humidified applications requiring reproducible temperature environments, including microbial growth studies, enzyme activity assays, cell line maintenance, and environmental simulation testing in academic, pharmaceutical, and industrial R&D laboratories.

Key Features

• Stainless steel (AISI 304) interior chamber with seamless welding and rounded corners for easy decontamination and compliance with basic biosafety cleaning protocols.
• Epoxy-coated cold-rolled steel exterior providing corrosion resistance and mechanical durability under routine laboratory handling.
• Digital LED display with real-time temperature readout and intuitive keypad interface—no external software required for basic operation.
• Compressor protection logic includes automatic 3-minute delay on power restoration to prevent liquid slug and thermal shock to the refrigeration system.
• Continuous-duty rating supports unattended 24/7 operation within ambient conditions of 0–40 °C and ≤85% RH (non-condensing).
• Low-noise fan assembly ensures minimal vibration transfer—critical for suspension cultures and sensitive biochemical assays.

Sample Compatibility & Compliance

The MKN-250B accommodates standard laboratory vessels including Petri dishes (up to 150 mm), multi-well plates (6–96-well), culture flasks (T25–T225), and glass or polycarbonate bottles (≤2 L). It is not designed for CO₂ control, humidity regulation, or sterile airflow—therefore unsuitable for mammalian cell culture requiring ISO Class 5 environments. While not certified to ISO 13485 or FDA 21 CFR Part 11 out-of-the-box, its temperature logging capability (via optional external data logger interface) permits integration into GLP/GMP workflows where audit trails and calibration records are maintained per internal SOPs. The unit conforms to GB/T 14710 for environmental adaptability and meets IEC 61000-4 immunity standards for laboratory-grade electromagnetic compatibility.

Software & Data Management

The MKN-250B operates as a standalone instrument with embedded firmware only—no proprietary software, USB ports, or network connectivity are included. Temperature setpoints and current readings are accessible exclusively via the front-panel LED interface. For traceable data acquisition, users may connect a calibrated external temperature data logger (e.g., Omega OM-DAQPRO-5300 or equivalent) to the analog output port (0–5 V DC, proportional to chamber temperature), enabling time-stamped recording compatible with CSV export and third-party analysis tools. Calibration verification should be performed annually using NIST-traceable reference thermometers per ISO/IEC 17025 guidelines.

Applications

• Bacterial and fungal culture propagation (e.g., E. coli, S. aureus, A. niger) under standardized incubation conditions aligned with ASTM D6578 and ISO 8199 protocols.
• Enzyme kinetics studies requiring precise thermal staging between 10–45 °C, such as amylase or protease activity profiling.
• Environmental stress testing of biomaterials, including polymer degradation monitoring at elevated temperatures (e.g., 37–50 °C).
• Quality control of reagents and media—particularly for shelf-life validation under accelerated aging conditions.
• Supporting ASTM D5511 anaerobic biodegradation testing when integrated with auxiliary gas control systems (external setup required).

FAQ

Is the MKN-250B suitable for mammalian cell culture?
No—it lacks CO₂ regulation, humidity control, and HEPA-filtered laminar airflow; use only for microbiological or biochemical applications where sterility is maintained externally.
Does the incubator support data logging or remote monitoring?
Not natively. An external data logger must be connected to the analog voltage output port for continuous temperature recording.
What is the recommended calibration interval?
Annual calibration against a NIST-traceable reference thermometer is advised, especially in regulated environments requiring documented metrological traceability.
Can the unit operate continuously for extended periods?
Yes—rated for uninterrupted duty under specified ambient conditions (0–40 °C, <85% RH), provided ventilation grilles remain unobstructed and maintenance intervals are observed.
Is service support available outside China?
MKN provides technical documentation and spare parts lists in English; international field service requires coordination through authorized regional distributors—not direct OEM support.