Ohaus Dry Bath Heat Block 12 Place x 12 mm Tubes

OHAUS Modular Dry Block Heater Insert, 12 x 12 mm Tubes (30400172)

The OHAUS 12 x 12 mm Tube Modular Block (30400172) is a high-precision, solid anodized aluminum dry bath insert engineered for uniform heating, thermal stability, and sample protection. Designed for seamless integration into OHAUS HB Series Dry Block Heaters and Incubating Cooling Orbital Shakers, this single-module block securely holds up to 12 standard 12 mm outer diameter tubes (such as 12 mm blood collection tubes, test tubes, or 1.5 mL/2.0 mL microcentrifuge tubes). Machined with deep, precision-contoured wells to maximize surface contact with tube walls, this insert minimizes thermal resistance and guarantees consistent heat distribution across all positions. Outfitted with an integrated thermometer well for independent temperature validation, this modular block is an essential consumable accessory for clinical chemistry, molecular biology, and routine diagnostic testing.

Technical Performance & Structural Attributes

• Solid Anodized Aluminum Construction: Manufactured from high-density, aircraft-grade aluminum with an anodized surface that resists chemical spills, rust, and surface degradation during high-temperature incubations.
• Precision-Machined Tube Wells: Deep 12.7 mm diameter wells contoured to tight tolerances, delivering optimal conduction and uniform heat transfer across all sample positions.
• Integrated Thermometer Well: Features a dedicated vertical monitoring bore for external temperature sensors, RTD probes, or stem thermometers to verify actual sample block temperatures.
• Modular Tool-Free Interchangability: Standard single-block footprint allows easy placement and removal from multi-block heating units for quick assay reconfigurations.

Product Specifications

• Catalog / Part Number: 30400172
• Primary Manufacturer: OHAUS Corporation
• Sample Vessel Compatibility: 12 mm Outer Diameter Tubes (12 mm test tubes, culture tubes, blood collection tubes)
• Capacity / Number of Wells: 12 Wells
• Well Diameter: 12.7 mm (0.50 in)
• Well Depth: 47.6 mm (1.88 in)
• Block Dimensions (L x W x H): 3.75 x 3.0 x 2.0 inches (9.5 x 7.6 x 5.1 cm)
• Material Composition: Anodized Aluminum
• System Compatibility: OHAUS HB Series Dry Block Heaters (1, 2, 4, and 6-block models) and Incubating Cooling Orbital Shakers

Key Benefits & Applications

• Clinical & Diagnostic Assays: Ideal for incubation of 12 mm blood tubes, coagulation testing, serum incubation, and enzyme-linked assays.
• Molecular Biology & Nucleic Acid Prep: Provides uniform heating for sample incubation, enzyme inactivation, restriction digests, and ligation reactions.
• Isothermal Heating Safety: Eliminates the mess, evaporation risks, and water-borne contamination hazards associated with traditional liquid water baths.
• High Heat Retention: Dense aluminum alloy acts as a thermal mass, maintaining stable temperature levels even during brief transfers between benchtop instruments.

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