ConductScience Filtered Pipette Tips 20uL, Sterile (Pack of 20)
$44.00 per unit | 20 units per pack Bulk pricing: Pack of 20 at $880.00 ($44.00 per unit)
| Automation Level | manual |
Universal-fit 20µL filtered pipette tips designed for precision liquid handling in molecular biology, cell culture, and analytical applications. Each tip features an integrated hydrophobic aerosol barrier that prevents sample carry-over and protects pipettes from contamination while maintaining accurate volume delivery. Manufactured from medical-grade polypropylene and certified DNase/RNase-free for molecular applications.
The aerosol barrier technology uses a hydrophobic filter membrane that allows air passage while blocking liquid aerosols, preventing cross-contamination between samples and protecting sensitive pipette internals from corrosive reagents. The universal fit design ensures compatibility with most standard 20µL pipettes from major manufacturers, providing reliable sealing and consistent performance across laboratory workflows.
How It Works
The filtered pipette tip operates through a dual-barrier system that combines precision liquid handling with contamination prevention. The tip body is manufactured from medical-grade polypropylene with precise internal dimensions that ensure accurate volume delivery when used with calibrated pipettes. The universal taper design creates a secure seal with pipette shafts, preventing air leaks that could compromise volume accuracy.
The integrated hydrophobic aerosol barrier consists of a microporous membrane positioned within the tip shaft. This membrane allows free air passage during normal pipetting operations while blocking liquid aerosols and vapors from entering the pipette. The hydrophobic treatment ensures that aqueous solutions cannot penetrate the filter, maintaining the barrier integrity throughout multiple aspirate-dispense cycles.
During operation, the filter prevents both upward migration of sample aerosols into the pipette and downward contamination from previous samples retained in the pipette air space. This dual protection is particularly critical when handling infectious agents, toxic compounds, or sensitive molecular biology reagents where even trace contamination can compromise results.
Features & Benefits
Automation Level
- manual
Research Domain
- Analytical Chemistry
- Cell Biology
- Clinical Diagnostics
- Environmental Monitoring
- Microbiology
- Pharmaceutical QC
Weight
- 4.41 kg
Dimensions
- L: 22.6 mm
- W: 18.8 mm
- H: 15.1 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Aerosol Barrier Type | Hydrophobic membrane barrier | Some alternatives use foam barriers or lack filtration entirely | Hydrophobic membranes provide superior liquid blocking while maintaining consistent air flow for accurate volume delivery |
| Volume Range | Optimized for 20µL applications | Multi-volume tips may compromise accuracy at specific volumes | Volume-specific design ensures optimal accuracy and precision within the intended range |
| Certification Level | DNase/RNase-free certified | Basic tips may lack nuclease-free certification | Certified nuclease-free status eliminates contamination risk in molecular biology applications |
| Material Quality | Medical-grade polypropylene | Standard laboratory-grade plastics | Medical-grade materials ensure consistent performance and reduced risk of leachables in sensitive applications |
These filtered tips combine hydrophobic aerosol barrier protection with medical-grade polypropylene construction and nuclease-free certification. The 20µL-specific design optimizes accuracy for micro-volume applications while universal fit ensures broad pipette compatibility.
Practical Tips
Pre-wet tips with sample solution 2-3 times before critical measurements to ensure surface equilibration and accurate volume delivery.
Why: Pre-wetting eliminates surface tension effects that can cause volume inaccuracies, particularly with aqueous solutions.
Verify volume accuracy using gravimetric analysis with distilled water at 20°C before beginning critical experiments.
Why: Environmental conditions and pipette calibration drift can affect accuracy, and verification ensures measurement reliability.
Inspect tips for cracks or deformation before use, particularly after storage in varying temperature conditions.
Why: Physical damage to tips can compromise the aerosol barrier and lead to contamination or volume inaccuracies.
Always dispose of used tips immediately after contact with hazardous materials to prevent cross-contamination and exposure risks.
Why: The aerosol barrier prevents pipette contamination but tips themselves can retain hazardous residues requiring proper disposal.
Use slow, controlled pipetting speeds when working with viscous solutions or volatile solvents to maintain volume accuracy.
Why: Rapid pipetting can cause incomplete sample transfer or evaporation losses that compromise measurement precision.
If volume delivery appears inconsistent, check tip attachment security and ensure pipette shaft is clean and undamaged.
Why: Poor tip sealing or contaminated pipette shafts can cause air leaks that affect volume accuracy and barrier effectiveness.
Setup Guide
What’s in the Box
- 960 sterile filtered pipette tips (20µL)
- Tips packaged in sterile racks or boxes (typical)
- Product documentation and certificate of analysis (typical)
Warranty
ConductScience provides a standard warranty covering manufacturing defects and material quality. Technical support is available for proper use guidance and compatibility questions.
Compliance
References
Background reading relevant to this product:
What is the volume accuracy and precision specification for these tips?
Consult the product datasheet for specific accuracy and precision values. Performance depends on both tip quality and pipette calibration status.
Are these tips compatible with electronic pipettes?
Yes, the universal fit design accommodates most electronic and manual pipettes with standard 20µL tip interfaces. Verify compatibility with your specific electronic pipette model.
Can these tips be autoclaved for additional sterilization?
The tips are pre-sterilized and ready for use. Autoclaving may compromise the aerosol barrier integrity and is not recommended.
What chemicals are incompatible with these polypropylene tips?
Avoid strong oxidizing agents, concentrated acids above 80°C, and certain aromatic hydrocarbons that may cause swelling. Consult chemical compatibility charts for specific reagents.
How does the aerosol barrier affect pipetting feel and volume accuracy?
The hydrophobic membrane adds minimal resistance to air flow and does not significantly alter pipetting feel or volume accuracy when tips are properly attached.
Are these tips suitable for organic solvents and DMSO?
Polypropylene construction provides good compatibility with most organic solvents including DMSO at room temperature. Extended exposure to aggressive solvents should be minimized.
Can these tips be used for protein solutions and enzymes?
Yes, the low-binding polypropylene surface minimizes protein adsorption, and the DNase/RNase-free certification ensures enzyme compatibility.
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