Technical Capabilities

Tapered Tips

Proprietary techniques derived from tube drawing bring the smoothest finish on diameters as small as 0.20mm (.008") and within the transition zones, unlike with the swaging technique.

There are no limitations on the number of steps nor on their length, permitting a wide range of sampling volumes on the same probe.

Close ID dimensional tolerances down to +/- 5µ and  a typical 0.10µ Ra translate into precise and repeatable sampling.

Tip geometries

Droplet formation may be influenced by minimizing surface contact of the probe with the liquid.

This can be achieved through the tube tip dimension that can be further reduced by OD conical machining to obtain a minimal flat ring at the tip.

Surface Modification

Cleaning: a choice of cleaning / degreasing techniques are available to remove surface residues on the tubing and on the fabricated tubular components, using chlorinated solvents, isopropyl alcohol, water based compounds, etc.

  • Passivation: a chemical process promoting corrosion resistance by removing free iron traces and building a chromium oxide layer on the metal surface. Dynamic passivation involves circulation of nitric acid and deionized water within the tubing ID. We can certify to internal standards and to XXX555a
  • Electro-polishing: this electro-chemical process removes a thin layer of metal on the outside of the components, while improving the surface smoothness, brightness and cleanness. It improves corrosion resistance and modifies the surface energy that interacts with the liquids sampled.
  • Mechanical polishing by grinding or buffing cleans and improves the surface appearance.
  • ID slurry polishing improves the surface finish by circulating abrasive charged viscous pastes under pressure.
  • Sand / bead blasting modifies surface reflectivity and cleans heat affected zones from brazing or welding.
  • Coatings may be applied on the OD and the ID of probes to promote a choice of functional requirements:
    • Drop control, protein adherence, metal ion diffusion barrier
    • Surface hardening to facilitate cap piercing
    • Electrical insulation, often in relation with level detection

A choice of coating formulation is available: various fluoropolymers with high anti adhesive and hydro-/oleophobic properties, inorganic-organic nanocomposites, silicone resins, hard chromium, titanium nitride, DLC, parylene, etc. We will be happy to discuss with you the coating options for your probe!

Fluoropolymer Lining

Combines the inert and lubricious polymer with the mechanical strength of the metal jacket. PTFE or FEP tubing is intimately bonded to the metallic probe down to its tip.

This solution eliminates any pinhole issue that might appear with polymer ID coating. The fluoropolymer tubing extends beyond the metal pipette top and may be flanged or assembled to a connector.

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