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Elgiloy Electrodes, Heat Treated Tapered Tip

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with Polymide Tubing (MicroProbes)
Monopolar Electrode with Polyimide Tubing
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Description

Elgiloy (a stainless cobalt-chromium alloy, similar to a stainless steel) is available in monopolar electrodes for specialty applications, such as vibrating probes for SVET. Elgiloy is most commonly used in dental implants and offers good biocompatibility and corrosion resistance.

Advantages Disadvantages
  • Versatile metal that offers good recording performance in acute and chronic applications.
  • Contains a small percentage of iron, which allows electrode tracts to be visually identified using Prussian Blue staining techniques.
  • Inadequate for microstimulation due to poor charge transfer characteristics and electrochemical instability during stimulation.
  • May corrode and degrade in performance when implanted for long periods of time or subjected to certain stimulation protocols.

These monopolar microelectrodes of MicroProbes are also available in Tungsten, Platinum-Iridium, and Pure Iridium metal. As an alternative we provide them with a thin coat of vapor-deposited Parylene-C insulation instead of the Polymide tubing. Each electrode is etched to a fine taper and tipped using a proprietary process to a specific impedance value. Four different tip profiles are also available to further fine-tune your electrode selection to your particular application.

We offer a variety of different tip alternatives for those that prefer a specialized electrode profile for their research.

The tip selection can provide subtle yet important changes to the performance of the electrode, as described below. It is recommended that first time users consider experimenting with different tip profiles to determine which works best for their recording or stimulation protocols.

For some applications concentric or bipolar electrodes (stereotrodes) are useful.

 

Monopolar Electrodes, Elgiloy (Stainless Steel), Heat Treated Tapered Tip
(225 µm × 3")
With Polymide Tubing

Item

Length

Shaft Diameter

Tip Diameter

Impedance

Applications

Pkg of 10

EL3PT30.01H10

76 mm

0.359 mm

2-3 µm

0.01 MΩ

MultiUnit & ERP recording & Stim

EL3PT30.05H10

76 mm

0.359 mm

0.05 MΩ

EL3PT30.1H10

76 mm

0.359 mm

0.1 MΩ

EL3PT30.5H10

76 mm

0.359 mm

0.5 MΩ

Single & multiunit rec. & stim.

EL3PT31.0H10

76 mm

0.359 mm

1-2 µm

1.0 MΩ

EL3PT31.5H10

76 mm

0.359 mm

1.5 MΩ

EL3PT32.0H10

76 mm

0.359 mm

2.0 MΩ

Greater selectivity & micro. stim.

EL3PT32.5H10

76 mm

0.359 mm

2.5 MΩ

Greater Selectivity - Small Cells

EL3PT33.0H10

76 mm

0.359 mm

3.0 MΩ

 

Common Tip Profiles:

Scheme of Standard Tip Profile
A - STANDARD TIP PROFILE
The standard tip profile features a sharp yet robust point that offers versatile performance and an effective balance between penetration and durability.
Scheme of Blunted Tip Profile
B - BLUNTED TIP PROFILE
The blunted electrodes are engineered to have a more rounded, bullet-shaped tip. For many applications the blunted tip can offer superior stimulation performance.
Scheme of Heat Treated Tapered Tip Profile
H - HEAT TREATED TAPERED TIP PROFILE
The heat-treated electrodes are intended for those investigators who must penetrate their probes through tough membranes, such as the dura mater of larger mammals.
Scheme of Extra Fine Tip Profile
F - EXTRA FINE TIP PROFILE
The extra-fine tip profile features a significantly sharper taper as well as a thinner insulation layer. Available in Tungsten only!

 

Also see:

Selecting the Optimum Electrode Configuration