How to Choose the Right Automation Tips for Your Liquid Handler

Why Automation Tips Are Different from Manual Tips

Dimensional Precision

Automated systems pick up multiple tips using precisely controlled robotic motion. Tip collar dimensions, rack positioning, straightness, and overall geometry must remain consistent across an entire rack.

Small dimensional differences that might go unnoticed during manual pipetting can produce failed pickup or uneven sealing on a multichannel robotic head.

Material Consistency

High-quality liquid handling tips are commonly manufactured from controlled polypropylene formulations with consistent molding characteristics.

Material and manufacturing consistency help maintain repeatable tip geometry, surface behavior, and mechanical performance between lots.

Specialized Features

Depending on the system and application, automation tips may include:

• Conductive material for capacitive liquid-level detection
• Filter barriers for aerosol control
• Low-retention surfaces for difficult liquids
• Extended-length formats for deeper labware
• Platform-specific collar and sealing geometry

For example, some automated systems use conductive tips for capacitive liquid-level detection, while other platforms use pressure-based sensing instead.

Sterility and Purity

Sterile or nuclease-controlled tips may be required for cell culture, PCR, NGS, or other contamination-sensitive workflows. Verify the actual sterility and purity specifications instead of assuming all automation tips meet the same standard.

Compatibility with Major Liquid Handler Platforms

Automation tips are generally platform-specific—and sometimes model- or pipetting-head-specific.

Common automated liquid-handler families include:

• Hamilton Microlab STAR, NIMBUS, and VANTAGE platforms
• Tecan Freedom EVO and Fluent platforms
• Beckman Coulter Biomek systems
• Agilent Bravo workstations
• Opentrons OT-2 and Flex systems

Even systems from the same manufacturer may require different tips. For example, OT-2 tips and Flex tips are not cross-compatible because their pipette interfaces differ.

Likewise, individual Hamilton tip configurations list specific compatible platforms and pipetting heads rather than claiming universal compatibility.

Always verify compatibility with your exact instrument model, pipetting head, volume range, and tip rack before purchasing.

Key Specifications to Consider

Volume Range

Choose a tip capacity appropriate for the actual transfer volume.

Common automation-tip ranges include approximately:

• 0.5–20 µL
• 1–50 µL
• 5–125 µL
• 10–200 µL
• 20–300 µL
• 50–1,000 µL
• Higher-volume formats up to several milliliters

Use the smallest validated tip that comfortably accommodates the transfer when accuracy at low volumes is important.

Filter vs. Non-Filter

Filter tips provide an aerosol barrier and are useful for PCR, nucleic acid workflows, and applications where carryover risk is important.

Non-filter tips are suitable for many routine aqueous transfers and generally provide greater usable internal volume.

Low-Retention Tips

Low-retention robotic pipette tips reduce liquid adhesion when working with glycerol, detergents, concentrated proteins, surfactants, or other difficult liquids.

Use them when residual sample materially affects delivered volume, reagent cost, or assay consistency.

Conductive vs. Non-Conductive

Some robotic systems use capacitance-based liquid-level detection and therefore rely on conductive tips. Other instruments use pressure sensing or alternative methods.

Do not select conductive tips simply because they appear more advanced—select them when the system and liquid class require them.

Packaging Format

Tip racks must fit the physical deck configuration and automated pickup process.

Confirm:

• Rack footprint
• Tip spacing
• Rack orientation
• Barcode requirements
• Full-rack pickup requirements
• Refill versus pre-racked configuration

Common Mistakes to Avoid

• Assuming one automation tip fits multiple platforms. Tip collars and pickup mechanisms differ between systems.
• Using manual tips for robotic operation. Manual tips may not meet the dimensional consistency required for automated pickup and ejection.
• Reusing disposable automation tips without a validated protocol. Reuse can introduce carryover, sealing changes, and contamination.
• Improper storage. Keep sterile tips protected in their original packaging until use.
• Ignoring reservoir dead volume. Insufficient reagent depth can cause incomplete aspiration even when the tip itself performs correctly.

Use appropriately sized Reagent Reservoir Plates or Disposable Reagent Troughs to maintain accessible liquid depth throughout automated runs.

Best Practices for Automation Tip Selection

Validate tip pickup, sealing, dispensing, and ejection before large-scale use.

• Monitor channel-to-channel CV during qualification.
• Keep tip specifications consistent across comparable experiments.
• Use low-retention tips for viscous or detergent-containing reagents when retention affects performance.
• Use filter tips when aerosol control is required.
• Include both the tip and reagent reservoir in liquid-class validation.
• Revalidate the method whenever you change tip geometry, material, filter configuration, or rack format.

Tip selection is part of the automated method—not a separate purchasing decision.

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