Metal Electrode Selection Guide for Profile C

NOTE: A heat treated tip is ideal for penetrating tough membranes. (It is not recommended for chronic implantation.) This process is performed using a microforge in which the heating element is positioned in close proximity to the tip in order to melt the Parylene-C distal to the exposed metal. It provides a smooth transition and produces better adherence of the Parylene-C to the metal. Both the KT and non-KT electrodes are heat-treatable. The heat treatment is applied only to the parylene coating. The heat melts the parylene so it feathers down close to the shank near where the tip is exposed. This removes the abrupt edge where the parylene has been removed to create the tip exposure. The purpose is to prevent the parylene from delaminating from the electrode during implantation into tissue which could catch on the edge. Heat treatment does not work well in chronic applications, because the feather edge is susceptible to fluid intrusion overtime, which will alter the impedance characteristics of the electrode unfavorably.

To have your electrodes heat treated, just add the suffix “H” to any of the “KT” numbers. This treatment incurs an additional cost. Please call for pricing.

Profile C Microelectrodes

 ProfileCSingleElectrodeWpolymideTubing

Platinum Iridium

Platinum Iridium Profile C Comparison Chart, 51 mm

ItemLengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical UseQuantity
PTM23B10KT 51mm 0.356mm 1.0MΩ 1-2µ Single and multi unit recording, stimulation, chronic implants. Package of 10

Platinum Iridium Profile C Comparison Chart, 305 mm

ItemLengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical UseQuantity
PTM123B05KT 305mm 0.61mm 0.5MΩ 1-2µ Deep brain studies Package of 5

Tungsten

Tungsten Profile C Comparison Chart, 76 mm long, 0.145 mm shaft


Item
LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical Use
TM31C05KT 76mm 0.145 mm 0.5 MΩ Recording from small tightly packed cells
TM31C20KTH 76mm 0.145 mm 2..0 MΩ Recording from small tightly packed cells
TM31C40KT 76mm 0.145 mm 4.0 MΩ Recording from small tightly packed cells
TM31C40KTH 76mm 0.145 mm 4.0 MΩ Recording from small tightly packed cells
TM33C05KT 76mm 0.145 mm 0.5 MΩ Single unit and stim / chronic use
TM33C10KT 76mm 0.145 mm 1.0 MΩ Single unit and stim / chronic use
TM33C20KT 76mm 0.145 mm 2.0 MΩ Single unit and stim / chronic use
TM33C20KTH 76mm 0.145 mm 2.0 MΩ Single unit and stim / chronic use
TM33C40KT 76mm 0.145 mm 4.0 MΩ Single unit and stim / chronic use
TM33C40KTH 76mm 0.145 mm 4.0 MΩ Single unit and stim / chronic use

Tungsten Profile C Comparison Chart, 76 mm long, 0.216 mm shaft


Item
LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical Use
TM31A10KTB 76mm 0.216 mm 1.0 MΩ Multi unit and single unit recording and microstimulation
TM31A10KTH 76mm 0.216 mm 1.0 MΩ Multi unit and single unit recording and microstimulation
TM31A20KT 76mm 0.216 mm 2.0 MΩ Multi unit and single unit recording and microstimulation
TM31A50KT 76mm 0.216 mm 5.0 MΩ Multi unit and single unit recording and microstimulation
TM31A50KTH 76mm 0.216 mm 5.0 MΩ Multi unit and single unit recording and microstimulation
TM33A10KT 76mm 0.216 mm 1.0 MΩ Multi unit and single unit recording and microstimulation
TM33A10KTH 76mm 0.216 mm 1.0 MΩ Multi unit and single unit recording and microstimulation
TM33A20KT 76mm 0.216 mm 2.0 MΩ Multi unit and single unit recording and microstimulation
 

Tungsten Profile C Comparison Chart, 76 mm long, 0.356 mm shaft


Item
LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical Use
TM33B01KT 76mm 0.356 mm 0.1 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B01KTB 76mm 0.356 mm 0.1 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B01KTH 76mm 0.356 mm 0.1 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B05KTH 76mm 0.356 mm 0.5 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B10KTB 76mm 0.356 mm 1.0 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B10KTH 76mm 0.356 mm 1.0 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B20KT 76mm 0.356 mm 2.0 MΩ 1-2µ Single and multi unit recording and microstimulation
TM33B20KTH 76mm 0.356 mm 2.0 MΩ 1-2µ Single and multi unit recording and microstimulation

Tungsten Profile C Comparison Chart, 127 mm long


Item
LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical Use
TM53B05KT 127mm 0.356 mm 0.5 MΩ Deep penetrations
TM53A15KT 127mm 0.216 mm 1.5 MΩ Deep penetrations for single and multi unit recording and stimulation
TM53A05KT 127mm 0.216 mm 0.5 MΩ Deep penetrations for single and multi unit recording and stimulation
TM53A20KT 127mm 0.216 mm 2.0 MΩ Deep penetrations for single and multi unit recording and stimulation
TM53B20KT 127mm 0.356 mm 2.0 MΩ Deep penetrations
TM53A10KT 127mm 0.216 mm 1.0 MΩ Deep penetrations for single and multi unit recording and stimulation
TM53B10KT 127mm 0.356 mm 1.0 MΩ Deep penetrations
TM53A10KTH 127mm 0.216 mm 1.0 MΩ Deep penetrations for single and multi unit recording and stimulation. Heat treated.

Elgiloy/Stainless

Item LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical UseQuantity
SSM123B10KT 76mm 0.61mm 1.0 M  1-2µ Deep brain studies Package of 5
SSM123B20KT 76mm 0.61 mm 1.0 M 1-2µ Deep brain studies Package of 5
SSM123B05KT 76mm 0.61 mm 0.5 M 1-2µ Deep brain studies Package of 5

Pure Iridium

Item LengthInsulation
Thickness
Shaft
Diameter
Nominal
Impedance
±20%
Tip
Diameter
Typical Use
IRM23E05KT 50mm 0.180 mm 0.5 MΩ 2-3µ Multiunit & ERP recording & stimulation 
IRM23E15KT 50mm 0.180 mm 1.5 MΩ 1-2µ Single and multiunit recording and stimulation 
IRM23E20KT 50mm 0.180 mm 2.0 MΩ 1-2µ Greater selectivity & microstimulation 
IRM23E25KT-H 50mm 0.180 mm 2.5 MΩ  1-2µ Greater selectivity - small cells 
IRM23E30KT 50mm 0.180 mm 3.0 MΩ 1-2µ Greater selectivity - small cells 
IRM23E50KT-H 50mm 0.180 mm 5.0 MΩ 1-2µ Greater selectivity - small cells 
 

See Selection