Platinum/Iridium Bipolar Electrodes, Heat Treated Tapered Tip

70 % Pt, 30 % Ir (MicroProbes)
Description

 Platinum-Iridium alloy is considered by many to be the “gold standard” for chronic recording and microstimulation due to its excellent electrochemical and mechanical characteristics.

Advantages Disadvantages
  • Platinum-Iridium possesses lower concomitant impedance, higher charge transfer capacity, and improved electrochemical stability compared to tungsten and stainless steel.
  • Offers excellent and versatile microstimulation performance, allowing safe stimulation to be performed with small probe sizes.
  • Iridium content of alloy greatly improves mechanical hardness and stiffness, providing electrodes with a degree of bend resistance that approaches tungsten.
  • Greater cost than tungsten and stainless steel, making it less appropriate for acute recording or non-intensive chronic recording.
  • Can be vulnerable to corrosion and dissolution with some intensive stimulation protocols.

 

Stereotrodes (Bipolar Electrodes)Platinum/Iridium, Heat Treated Tapered Tip (75 µm × 2")

Item

Length

Outside Diameter

Tip Separation

Impedance

Applications

Pkg of 10

PI2ST30.1H3

51 mm

0.216 mm

75 µm

0.1 MΩ

Multi Unit record. & Stim.

€ 744.00

PI2ST30.5H3

51 mm

0.216 mm

75 µm

0.5 MΩ

Single & multiunit rec. & stim.

€ 744.00

PI2ST31.0H3

51 mm

0.216 mm

75 µm

1.0 MΩ

Single & multiunit rec. & stim.

€ 744.00

PI2ST31.5H3

51 mm

0.216 mm

75 µm

1.5 MΩ

Single & multiunit rec. & stim.

€ 744.00

PI2ST32.0H3

51 mm

0.216 mm

75 µm

2.0 MΩ

Greater Selectivity & Micro. Stim.

€ 744.00

PI2ST33.0H3

51 mm

0.216 mm

75 µm

3.0 MΩ

Greater Selectivity & Micro. Stim.

€ 744.00

 

Stereotrodes - Platinum/Iridium - Heat Treated Tapered Tip (125 µm × 2")

Item

Length

Outside Diameter

Tip Separation

Impedance

Applications

Pkg of 10

PI2ST30.1H5

51 mm

0.356 mm

125 µm

0.1 MΩ

Multi Unit record. & Stim.

€ 760.00

PI2ST30.5H5

51 mm

0.356 mm

125 µm

0.5 MΩ

Single & multiunit rec. & stim.

€ 760.00

PI2ST31.0H5

51 mm

0.356 mm

125 µm

1.0 MΩ

Single & multiunit rec. & stim.

€ 760.00

PI2ST31.5H5

51 mm

0.356 mm

125 µm

1.5 MΩ

Single & multiunit rec. & stim.

€ 760.00

PI2ST32.0H5

51 mm

0.356 mm

125 µm

2.0 MΩ

Greater Selectivity & Micro. Stim.

€ 760.00

 

Stereotrodes - Platinum/Iridium - Heat Treated Tapered Tip (225 µm × 2")

Item

Length

Outside Diameter

Tip Separation

Impedance

Applications

Pkg of 10

PI2ST30.1H10

51 mm

0.560 mm

225 µm

0.1 MΩ

Multi Unit record. & Stim.

€ 756.00

PI2ST30.5H10

51 mm

0.560 mm

225 µm

0.5 MΩ

Single & multiunit rec. & stim.

€ 756.00

PI2ST31.0H10

51 mm

0.560 mm

225 µm

1.0 MΩ

Single & multiunit rec. & stim.

€ 756.00

PI2ST31.5H10

51 mm

0.560 mm

225 µm

1.5 MΩ

Single & multiunit rec. & stim.

€ 756.00

PI2ST32.0H10

51 mm

0.560 mm

225 µm

2.0 MΩ

Greater Selectivity & Micro. Stim.

€ 756.00

 

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