MKN SG-40 Precision Metal Block Dry Bath Incubator

Overview

The MKN SG-40 Precision Metal Block Dry Bath Incubator is a microprocessor-controlled thermal platform engineered for reproducible, contamination-free sample incubation in molecular biology, clinical diagnostics, and quality control laboratories. Unlike water baths, this dry bath eliminates condensation, cross-contamination, and evaporation risks by using direct conductive heating via a high-thermal-conductivity aluminum alloy block. Its temperature regulation leverages a hybrid thermal architecture—combining resistive heating elements with intelligent Peltier-assisted thermal compensation—to achieve rapid equilibration (<15 min from ambient to 100°C), minimal overshoot, and long-term stability. The device operates on the principle of solid-state heat transfer: thermal energy is delivered uniformly across the block surface through optimized fin geometry and precise PID feedback control, ensuring consistent thermal profiles across all wells regardless of loading configuration.

Key Features

• High-density anodized aluminum heating block with machined well arrays for optimal thermal mass and low thermal resistance
• Dual-standard well configuration: 20×1.5 mL and 20×10 mL positions—compatible with common microcentrifuge tubes (Φ10 mm, Φ12 mm, Φ15 mm) without adapters
• Intelligent digital temperature controller with real-time display, user-defined setpoint (0.1°C resolution), and auto-hold function
• Precision temperature performance: ±0.2°C deviation at 37°C (physiological standard), ±0.3°C at 65°C (common enzymatic denaturation point), ±0.5°C across full range (RT–100°C)
• Programmable digital timer (0–999 min) with audible alert and automatic power cutoff upon completion
• Optional stainless-steel light-blocking and dust-proof cover—enables open-tube operation during PCR pre-denaturation, serum coagulation, or enzyme kinetics assays
• Robust mechanical design: reinforced chassis, non-slip rubber feet, and EMI-filtered power input for stable operation in shared lab environments

Sample Compatibility & Compliance

The SG-40 accommodates standard thin-wall polypropylene and glass tubes used in DNA amplification, antigen-antibody binding, clotting assays, and ligase-mediated reactions. Its dry-heating architecture complies with ISO 15197:2013 requirements for thermal consistency in diagnostic reagent incubation and supports GLP-aligned workflows where traceability and environmental control are critical. The unit meets IEC 61010-1 safety standards for laboratory electrical equipment and carries CE marking for conformity with EU health, safety, and environmental protection directives. All materials contacting the block surface are RoHS-compliant and non-outgassing—ensuring compatibility with sensitive immunoassays and nucleic acid integrity preservation.

Software & Data Management

While the SG-40 operates as a standalone instrument with no embedded connectivity, its analog-digital hybrid control circuitry supports external data logging via optional 4–20 mA or 0–5 V analog output modules (sold separately). When integrated into validated laboratory systems, it satisfies FDA 21 CFR Part 11 requirements for audit-trail-capable thermal devices when paired with compliant SCADA or LIMS platforms. The front-panel interface retains last-used parameters after power cycling—a feature aligned with USP guidelines for analytical instrument qualification (AIQ) and routine operational checks.

Applications

• Pre-incubation of restriction enzyme digests and ligase reactions at 16–37°C
• Thermal denaturation steps in PCR protocols (e.g., 95°C for 5 min)
• Serum coagulation studies requiring precise 37°C maintenance over 30–60 min intervals
• Controlled thawing of cryopreserved cell suspensions and antibody stocks
• Standardization of ELISA plate incubation conditions prior to plate reader analysis
• Calibration verification of thermocouples and RTDs used in adjacent instrumentation

FAQ

Is the SG-40 suitable for overnight incubation?
Yes—the timer supports up to 999 minutes (~16.6 hours), and the auto-shutdown function ensures safe termination; however, continuous unattended operation beyond 12 hours requires risk assessment per institutional biosafety policies.
Can I replace the heating block with a custom configuration?
Yes—MKN offers OEM machining services for non-standard well diameters (e.g., 0.2 mL PCR strips, 15 mL conical tubes); lead time and minimum order quantities apply.
Does the unit support external temperature probe feedback?
No—the built-in PT100 sensor monitors block surface temperature only; for sample-core temperature validation, users must employ independent calibrated probes per ISO/IEC 17025 method validation requirements.
What maintenance is required for long-term accuracy?
Annual verification using NIST-traceable dry-block calibrators is recommended; cleaning should be limited to isopropyl alcohol wipes—no solvents or abrasives on the anodized surface.