Tungsten Electrodes, Standard Tip CEA 200

Elgiloy Electrodes, Blunted Tip

(MicroProbes)

Monopolar Electrode with Parylene-C Coating

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. The electrodes are insulated with a thin film of vapor-deposited Parylene-C. As an option we provide them surrounded by 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), Blunted Tip
(225 µm × 3")

Item	Length	Shaft Diameter	Tip Diameter	Impedance	Applications	Pkg of 10
EL30030.01B10	76 mm	0.229 mm	3-5 µm	0.01 MΩ	MultiUnit & ERP recording & Stim
EL30030.05B10	76 mm	0.229 mm		0.05 MΩ
EL30030.1B10	76 mm	0.229 mm		0.1 MΩ
EL30030.5B10	76 mm	0.229 mm		0.5 MΩ	Single & multiunit rec. & stim.
EL30031.0B10	76 mm	0.229 mm	3-4 µm	1.0 MΩ
EL30031.5B10	76 mm	0.229 mm		1.5 MΩ
EL30032.0B10	76 mm	0.229 mm		2.0 MΩ	Greater selectivity & micro. stim.
EL30032.5B10	76 mm	0.229 mm		2.5 MΩ	Greater Selectivity - Small Cells
EL30033.0B10	76 mm	0.229 mm		3.0 MΩ	Greater Selectivity - Small Cells

Common Tip Profiles:

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.

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.

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.

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