The double-head biological evidence swab is a multi-sample tool, featuring two distinct sampling heads to collect and separate biological evidence efficiently in one device.
Core Content
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Design: Dual-headed structure with flocked/cotton heads (or two flocked heads); central shaft with color-coded markers for head distinction.
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Usage: Use one head for primary sample collection, the other for duplicate/secondary sampling; place each head in separate preservation tubes.
Key Features
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Multi-sample capability: Two heads enable simultaneous or sequential sampling without extra tools.
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Sample separation: Prevents cross-contamination between primary and duplicate samples.
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Cost-efficient: Reduces tool count while maintaining sampling quality for multiple evidence points.
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Sterile: Single-use, individually packaged to ensure evidence integrity in crime scenes.
Application Scope
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Forensic crime scenes: Collecting blood, saliva, or touch DNA from the same or adjacent evidence surfaces.
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Lab verification: Providing duplicate samples for parallel DNA testing and result confirmation.
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Field investigations: Limited-tool scenarios needing multiple samples (e.g., remote crime scenes).