MKN DHP-270 Temperature-Controlled Incubator

Overview

The MKN DHP-270 is a benchtop forced-air temperature-controlled incubator engineered for stable, reproducible thermal environments in life science laboratories. Designed for dry incubation applications—such as microbial culture maintenance, cell line propagation, enzyme activity assays, and stability testing—the DHP-270 employs convection-driven air circulation to ensure uniform heat distribution across its 270-liter stainless steel chamber. Unlike humidity-integrated models, this unit operates without active humidification, making it ideal for applications where moisture control is either unnecessary or potentially detrimental (e.g., bacterial stock preservation, desiccation-sensitive media storage, or long-term reagent incubation). Its heating system utilizes externally mounted sheathed resistive elements, eliminating internal radiant hot spots and minimizing thermal overshoot—a critical design consideration for preserving thermolabile biological samples. The incubator complies with core performance benchmarks outlined in ISO 13408-1 (sterile processing of healthcare products) and aligns with general laboratory equipment requirements under GLP (Good Laboratory Practice) frameworks.

Key Features

• Microprocessor-based digital controller with dual LED display showing setpoint and real-time chamber temperature
• PID (Proportional-Integral-Derivative) algorithm for precise temperature regulation and minimal deviation (±0.5°C uniformity at 37°C)
• Dual-pane tempered glass observation door with anti-fog coating—enables continuous visual monitoring without thermal disturbance
• 304 stainless steel inner chamber resistant to corrosion, autoclave-compatible cleaning agents, and repeated disinfection cycles
• Independent mechanical over-temperature safety cut-off (adjustable up to 70°C) acting as redundant thermal protection
• Front-accessible air intake and rear-mounted exhaust vents optimized for laminar airflow and reduced thermal stratification
• Low-noise centrifugal blower ensuring consistent air velocity (≥0.3 m/s at working level) without vibration-induced sample disruption

Sample Compatibility & Compliance

The DHP-270 supports standard microbiological and cellular workflows involving Petri dishes, multi-well plates, culture flasks (T25–T225), and serum bottles. Its dry incubation architecture avoids condensation-related contamination risks associated with humidified systems—particularly beneficial when handling antibiotic-containing media or low-humidity-requiring fungal cultures. The unit meets structural and operational criteria referenced in CLSI M22-A3 (Quality Assurance for Microbiological Culture Media) and is routinely validated per ASTM E2500-13 (Standard Guide for Specification, Design, and Verification of Pharmaceutical and Biopharmaceutical Manufacturing Systems). While not certified for ISO Class 5 environments, its sealed chamber design and smooth interior surfaces facilitate routine cleaning and verification per facility-specific SOPs.

Software & Data Management

The DHP-270 operates via embedded firmware without external software dependency—ensuring operational continuity during network outages or IT policy restrictions. All temperature logs are stored locally in non-volatile memory (retaining ≥30 days of 1-minute interval data) and exportable via optional RS-485 interface (Modbus RTU protocol) for integration into LabVantage, STARLIMS, or custom SCADA platforms. Audit trail functionality includes timestamped records of setpoint changes, door openings, and alarm events—supporting compliance with FDA 21 CFR Part 11 when paired with validated third-party data acquisition modules. No cloud connectivity or proprietary drivers are required for basic operation or calibration verification.

Applications

• Maintenance of bacterial and yeast stock cultures (e.g., E. coli, S. cerevisiae) at standardized temperatures (30°C, 37°C)
• Incubation of diagnostic agar plates for colony isolation and antimicrobial susceptibility testing (AST)
• Thermal validation studies for sterilization process development (e.g., dry-heat depyrogenation trials)
• Pre-incubation of ELISA plates and immunoassay reagents prior to assay execution
• Controlled-temperature storage of lyophilized enzymes, antibodies, and reference standards
• Supporting ISO/IEC 17025-accredited testing labs requiring documented thermal stability during method validation

FAQ

Does the DHP-270 support humidity control?
No. This model is designed exclusively for dry incubation. For humidity-regulated applications, consider the MKN DHSP series.
What is the recommended calibration frequency?
Annual calibration against NIST-traceable reference thermometers is advised; internal sensor drift remains ≤±0.2°C/year under normal use conditions.
Can the unit be stacked or installed in enclosed cabinetry?
No. Minimum clearance of 10 cm on all sides—including top—is required for adequate heat dissipation and airflow management.
Is the chamber compatible with ethanol or hydrogen peroxide vapor decontamination?
Yes—304 stainless steel construction withstands routine exposure to ≤70% ethanol and vapor-phase H₂O₂ (≤1000 ppm), provided post-decon drying cycles are performed.
What safety certifications does the DHP-270 hold?
CE marking (2014/30/EU EMC Directive and 2014/35/EU LVD Directive); RoHS 2011/65/EU compliant; no UL/CSA listing available for North American markets.