Precision tetrode wire

Tetrode wire is commonly used for making probes used to collect extracellular recordings of the brain.

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Tetrode wire, PF0591 RO800, 0.0005”, ¼ Hard, PAC

  • Spool sizes: 1000 ft. (PX4), 500 ft. (PX3), 100 ft. (PX2)
  • Alloy: Nickel-Chrome (NiCr) RO800, Redi Ohm 800
  • Diameter: 55.5 AWG, 0.0005", 0.012 mm
  • Polyimide (PAC) Coating well suited to minimize biological impacts.

Tetrode wire, PF4803 RO800, 0.0005”, ¼ Hard, PAC/Bond XTC

  • Spool size: 1000 ft. ( PX29), 500 ft. (PX28), 100 ft. (PX27)
  • Alloy: Nickel-Chrome (NiCr), RO800, Redi Ohm 800
  • Diameter: 55.5 AWG, 0.0005", 0.012 mm
  • Polyimide (PAC) Coating well suited to minimize biological impacts.
  • Polyamide (Bond XTC) Coating improves the bonding characteristics of the wires when fabricating probes.

Component contents

Description

Polyimide coating chosen to minimize the biological impact. Either coated configuration can be multifilared via twisting, or ribbon configuration for multipoint measurements required in multivariate analysis. The product has been proven effective in use globally for extracellular measurements by numerous research facilities for many years.

Coating

Pac-240A is a high performance, blended Type 1 & Type II, Class 240 polyimide wire enamel. The coating is highly flexible and can withstand minimum bending radii of 50% of the coated wire diameter without cracking or crazing. The dielectric strength is rated at 11.0 kV/mil thickness and applied in such a way as to be pinhole free for the application. The PAC-240A coating can be heated to an elevated temperature to join twisted wires together, however, the joining process is improved when using the Bond XTC coated variant.

Bond Coating

Sandvik Bond XTC is a high-temperature thermoplastic polyamide bondcoat. It will soften and reflow with the application of heat during the twisting operation of forming a tetrode probe. During exposure to heat, the XTC polyamide bond coat layer will reflow without impacting the polyimide insulation base layer and provide a joint between coated surface layers that are in contact. Upon cooling, the overcoat hardens, which helps lock the stranded turns in place. Bond XTC should be considered reversible in that a return to high temperature will once again soften the coating.