Tungsten Bipolar Electrodes, Extra Fine Tip

(MicroProbes)
Description

Tungsten is a versatile and widely-used microelectrode material that offers a good balance between performance and cost.

Advantages Disadvantages
  • Extremely strong and stiff metal provides probes with exceptional rigidity.
  • Great for acute and chronic recording due to biocompatibility and lower cost.
  • High corrosion resistance offers consistent long-term performance.
  • Does not provide the same degree of electrochemical performance or stability as platinum-iridium alloy, making it a poor alternative for microstimulation.
  • Lower charge transfer capacity of tungsten will result in larger, potentially unsafe interfacial potentials when applying the same stimulation current as to a platinum-iridium electrode.
  • Certain pH or stimulation conditions can lead to tungsten corrosion.

 

Stereotrodes (Bipolar Electrodes), Tungsten, Extra Fine Tip  (75 µm × 3")

Item

Length

Outside Diameter

Tip Separation

Impedance

Applications

Pkg of 10

WE3ST10.1F3

76 mm

0.216 mm

75 µm

0.1 MΩ

Multi Unit record. & Stim.

€ 530.00

WE3ST10.5F3

76 mm

0.216 mm

75 µm

0.5 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST11.0F3

76 mm

0.216 mm

75 µm

1.0 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST11.5F3

76 mm

0.216 mm

75 µm

1.5 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST12.0F3

76 mm

0.216 mm

75 µm

2.0 MΩ

Greater Selectivity & Micro. Stim.

€ 530.00

WE3ST13.0F3

76 mm

0.216 mm

75 µm

3.0 MΩ

Greater Selectivity & Micro. Stim.

€ 530.00

WE3ST15.0F3

76 mm

0.216 mm

75 µm

5.0 MΩ

Small Cell Recording

€ 530.00

 

Stereotrodes - Tungsten - Extra Fine Tip (125 µm × 3")

Item

Length

Outside Diameter

Tip Separation

Impedance

Applications

Pkg of 10

WE3ST10.1F5

76 mm

0.356 mm

125 µm

0.1 MΩ

Multi Unit record. & Stim.

€ 530.00

WE3ST10.5F5

76 mm

0.356 mm

125 µm

0.5 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST11.0F5

76 mm

0.356 mm

125 µm

1.0 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST11.5F5

76 mm

0.356 mm

125 µm

1.5 MΩ

Single & multiunit rec. & stim.

€ 530.00

WE3ST12.0F5

76 mm

0.356 mm

125 µm

2.0 MΩ

Greater Selectivity & Micro. Stim.

€ 530.00

WE3ST13.0F5

76 mm

0.356 mm

125 µm

3.0 MΩ

Greater Selectivity & Micro. Stim.

€ 530.00

WE3ST15.0F5

76 mm

0.356 mm

125 µm

5.0 MΩ

Small Cell Recording

€ 530.00

 

 

Stereotrodes are excellent for bipolar stimulation studies where the current injection needs to be confined to a small localized part of the neural tissue.

They have also been used for enhanced isolation of single neural elements by simultaneous recordings of multiple units on two closely spaced microelectrodes. The tip spacing is typically equal to the diameter of the electrode shaft, however, they can be specified to greater separations in most instances.

MicroProbes offer a variety of electrode configurations including tip profiles, in different lengths, mounting schemes, also for concentric or single electrodes and custom designs.

 

Common Tip Profiles:

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.
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.
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.
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.

 

Also see:

Selecting the Optimum Electrode Configuration