Metal Microelectrodes

METAL MICROELECTRODES
Nominal Impedance

Tungsten

Elgiloy

 Platinum Iridium Pure Iridium

0.1 Meg ohm

100 µ

120 µ

60 µ

45 µ

0.5 Meg ohm

55 µ

66 µ

18 µ

14 µ

1.0 Meg ohm

30 µ

36 µ

10 µ

10 µ

2.0 Meg ohm

12 µ

15 µ

6 µ

5 µ

5.0 Meg ohm

5 µ

6µ

3 µ

2.5 µ
Kapton* tubing, indicated by “KT” in the part number, extends from the connector to within 5 mm of the tip, providing stiffness and additional insulation to the electrode shaft. Kapton-clad electrodes are recommended when the electrode is to be inserted through a cannula for extra deep penetration.
Heat Treated Tip (above) is ideal for penetraing tough membranes (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.
To have your electrodes heat treated, just add the suffix “H” to any of the “KT” numbers on the facing page. Cost of the treatment is $10 per package of 10 electrodes ($20 per package for Type B).
Introductory Assortments

Each of these assortment kits includes electrodes with different impedance within each style. Use an assortment kit to determine which electrode you need for your experiment. Ten electrodes per box, no mixing. See next page for electrode nomenclature.
Item Contains the following electrode impedances by quantity (pkg of 10)
TM31/33Axx TM33A05 (2), TM33A10 (3), TM33A20 (3), TM31A50 (2)
TM31/33AxxKT TM33A05KT (2), TM33A10KT (3), TM33A20KT (3), TM31A50KT (2)
TM33Bxx TM33B01 (2), TM33B05 (2), TM33B10 (3), TM33B20 (3)
TM33BxxKT TM33B01KT (3), TM33B05KT (2), TM33B10KT (3), TM33B20KT (2)
TM53Axx TM53A05 (3),TM53A10 (3),TM53A20 (4)
TM53AxxKT TM53A05KT (3),TM53A10KT (3),TM53A20KT (4)
TST33AxKT TST33A05KT (3), TST33A10KT (4), TST33A20KT (3)
TST53AxKT TST53A05KT (3), TST53A10KT (4), TST53A20KT (3)
PTM23Bxx PTM23B05 (3), PTM23B10 (3), PTM23B20 (4)
PTM23BxxKT PTM23B05KT (4), PTM23B10KT (3) , PTM23B20KT (3)

Concentric Electrodes*
Concentric Bipolar Electrodes
Excellent for shielded macro recording as well as evoked potentials — especially well suited for bipolar stimulation
The tungsten electrode is sharpened to a point and is 75 microns in diameter. The outer stainless steel conductor is insulated with Polyimide tubing to within 0.2 mm of the end of the stainless steel tube. Also available without the outer Polyimide insulation.

Insulated metal conductor with exposed concentric surface
Item
Metal Core
Length
Imp
Probe Outer
Tip
Core diam.
Y dim.
X dim. w/ polyimide
 
 
 
 
Diameter (total)
Diam.
 
 
 
TM33CCNON
Tungsten
3" (76)
10-15K
0.013" uninsulated (325 µm)
3-4 µ
.003" (76 µm)
0.4 mm
.005" (127 µm)
TM53CCNON
Tungsten
5" (127)
10-15K
0.014" uninsulated (350 µm)
3-4 µ
005" (127 µm)
0.4 mm
.008" (203 µm)
TM33CCINS
Tungsten
3" (76)
10-15K
0.016" insulated (400 µm)
3-4 µ
003" (76 µm)
0.4 mm
.005" (127 µm)
TM53CCINS
Tungsten
5" (127)
10-15K
0.018" insulated (450 µm)
3-4 µ
005" (127 µm)
0.4 mm
.008" (203 µm)
PTM23CC001NON
Pt/Ir
2" (51)
10K
0.020" uninsulated (525 µm)
3-4 µ
0.01" (254 µm)
0.4 mm
.014" (356 µm)
PTM23CC001INS
Pt/Ir
2" (51)
10K
0.029" insulated (760 µm)
3-4 µ
0.01" (254 µm)
0.4 mm
.014" (356 µm)
PTM3CC02INS
Pt/IrN Sfine
3 (76)
200K
0.013" insulated (325 µm)
2-4 µ
0.002" (50.8 µm)
.25 mm
.004" (114 µm)
* All have a stainless steel outer shaft
Selection Guide for metal electrodes
Item
Length
Insul. Thick.
Shaft Diam.
Nominal Impedance (± 20%)
Tip Diam.
 Typical Use
Platinum Iridium
Profile A
 
 
 
 
 Package of 10
PTM23B05
51 mm
3 µ
0.254 mm
0.5 M ohm
1-2 µ
 Single and multi unit recording, stimulation, Chronic implants
PTM23B05KT
51 mm
3 µ
0.356 mm
0.5 M ohm
1-2 µ
 Single and multi unit recording, stimulation, chronic implants
PTM23B10
51 mm
3 µ
0.254 mm
1.0 M ohm
1-2 µ
 Single and multi unit recording, stimulation, Chronic implants
PTM23B10KT
51 mm
3 µ
0.356 mm
1.0 M ohm
1-2 µ
 Single and multi unit recording, stimulation, chronic implants
PTM23B20
51 mm
3 µ
0.254 mm
2.0 M ohm
1-2 µ
 Single and multi unit recording, stimulation, Chronic implants
PTM23B20KT
51 mm
3 µ
0.356 mm
2.0 M ohm
1-2 µ
 Single and multi unit recording, stimulation, chronic implants
TYPE A
Tungsten Profile A Package of 10
TM31A10
76 mm
1 µ
0.127 mm
1.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31A10KT
76 mm
1 µ
0.216 mm
1.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31A20
76 mm
1 µ
0.127 mm
2.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31A20KT
76 mm
1 µ
0.216 mm
2.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31A50
76 mm
1 µ
0.127 mm
5.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31A50KT
76 mm
1 µ
0.216 mm
5.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM31C05
76 mm
1 µ
0.085 mm
0.5 M ohm
1 µ
 Recording from small tightly packed cells
TM31C05KT
76 mm
1 µ
0.145 mm
0.5 M ohm
1 µ
 Recording from small tightly packed cells
TM31C10
76 mm
1 µ
0.085 mm
1.0 M ohm
1 µ
 Recording from small tightly packed cells
TM31C10KT
76 mm
1 µ
0.145 mm
1.0 M ohm
1 µ
 Recording from small tightly packed cells
TM31C20
76 mm
1 µ
0.085 mm
2.0 M ohm
1 µ
 Recording from small tightly packed cells
Tungsten Profile A Package of 10
TM31C20KT
76 mm
1 µ
0.145 mm
2.0 M ohm
1 µ
 Recording from small tightly packed cells
TM31C40
76 mm
1 µ
0.085 mm
4.0 M ohm
1 µ
 Recording from small tightly packed cells
TM31C40KT
76 mm
1 µ
0.145 mm
4.0 M ohm
1 µ
 Recording from small tightly packed cells
TM33A05
76 mm
3 µ
0.127 mm
0.5 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33A05KT
76 mm
3 µ
0.216 mm
0.5 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33A10
76 mm
3 µ
0.127 mm
1.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33A10KT
76 mm
3 µ
0.216 mm
1.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33A20
76 mm
3 µ
0.127 mm
2.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33A20KT
76 mm
3 µ
0.216 mm
2.0 M ohm
1 µ
 Multi unit and single unit recording and microstimulation
TM33B01
76 mm
3 µ
0.254 mm
0.1 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B01KT
76 mm
3 µ
0.356 mm
0.1 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B05
76 mm
3 µ
0.254 mm
0.5 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B05KT
76 mm
3 µ
0.356 mm
0.5 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B10
76 mm
3 µ
0.254 mm
1.0 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B10KT
76 mm
3 µ
0.356 mm
1.0 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B20
76 mm
3 µ
0.254 mm
2.0 M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33B20KT
76 mm
3 µ
0.356 mm
2.0M ohm
1-2 µ
 Single and multi unit recording and microstimulation
TM33C05
76 mm
1 µ
0.085 mm
0.5 M ohm
1 µ
Single unit and stim / chronic use
TM33C05KT
76 mm
1 µ
0.145 mm
0.5 M ohm
1 µ
Single unit and stim / chronic use
TM33C10
76 mm
1 µ
0.085 mm
1.0 M ohm
1 µ
Single unit and stim / chronic use
TM33C10KT
76 mm
1 µ
0.145 mm
1.0 M ohm
1 µ
Single unit and stim / chronic use
TM33C20
76 mm
1 µ
0.085 mm
2.0 M ohm
1 µ
Single unit and stim / chronic use
TM33C20KT
76 mm
1 µ
0.145 mm
2.0 M ohm
1 µ
Single unit and stim / chronic use
TM33C40
76 mm
1 µ
0.085 mm
4.0 M ohm
1 µ
Single unit and stim / chronic use
Single, Multiunit & recording stimulation

TM33C40KT

76 mm

1 µ

0.145 mm

4.0 M ohm

1 µ

 Single unit and stim / chronic use
TM53A05

127 mm

3 µ

0.127 mm

0.5 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A05KT

127 mm

3 µ

0.216 mm

0.5 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A10

127 mm

3 µ

0.127 mm

1.0 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A10KT

127 mm

3 µ

0.216 mm

1.0 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A15

127 mm

3 µ

0.127 mm

1.5 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A15KT

127 mm

3 µ

0.216 mm

 1.5 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A20

127 mm

3 µ

0.127 mm

 2.0 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53A20KT

127 mm

3 µ

0.216 mm

2.0 M ohm

2 µ

Deep penetrations for single and multi unit recording and stimulation
TM53B05

127 mm

3 µ

0.254 mm

0.5 M ohm

1 µ

 Deep penetrations
TM53B05KT

127 mm

3 µ

0.356 mm

0.5 M ohm

1 µ

 Deep penetrations
TM53B10

127 mm

3 µ

0.254 mm

1.0 M ohm

1 µ

 Deep penetrations
TM53B10KT

127 mm

3 µ

0.356 mm

1.0 M ohm

1 µ

 Deep penetrations
TM53B20

127 mm

3 µ

0.254 mm

2.0 M ohm

1 µ

 Deep penetrations
TM53B20KT

127 mm

3 µ

0.356 mm

2.0 M ohm

1 µ

 Deep penetrations
Elgiloy®/Stainless

Profile A

 

 

 

 

 Package of 10
SSM33A05

76 mm

3 µ

0.229 mm

0.5 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A05KT

76 mm

3 µ

0.356 mm

0.5 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A10

76 mm

3 µ

0.229 mm

1.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A10KT

76 mm

3 µ

0.356 mm

1.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A20

76 mm

3 µ

0.229 mm

2.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A20KT

76 mm

3 µ

0.356 mm

1.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A70

76 mm

3 µ

0.229 mm

7.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)
SSM33A120

76 mm

3 µ

0.229 mm

12.0 M ohm

1-2 µ

 Recording and Stimulating (Prussian blue staining)

TYPE B
Tungsten

Profile B

 

 

 Package of 10
TST33A05KT

76 mm

3 µ

0.356 mm

0.5 M ohm

1 µ

Stereotrode / Bipolar, differential measurements
TST33A10KT

76 mm

3 µ

0.356 mm

1.0 M ohm

1 µ

Stereotrode / Bipolar, differential measurements
TST33A20KT

76 mm

3 µ

0.356 mm

2.0 M ohm

1 µ

Stereotrode / Bipolar, differential measurements
TST33C05KT

76 mm

3 µ

0.216 mm

0.5 M ohm

1 µ

Stereotrode / Bipolar, differential measurements--extra fine
TST33C10KT

76 mm

3 µ

0.216 mm

1.0 M ohm

1 µ

Stereotrode / Bipolar, differential measurements--extra fine
TST33C20KT

76 mm

3 µ

0.216 mm

2.0 M ohm

1 µ

Stereotrode / Bipolar, differential measurements--extra fine
TST53A05KT

127 mm

3 µ

0.356 mm

0.5 M ohm

1-2 µ

 Stereotrode / Bipolar, differential measurements
TST53A10KT

127 mm

3 µ

0.356 mm

1.0 M ohm

1-2 µ

 Stereotrode / Bipolar, differential measurements
TST53A20KT

127 mm

3 µ

0.356 mm

2.0 M ohm

1-2 µ

 Stereotrode / Bipolar, differential measurements

TYPE C
IRM23E01 50mm 3µ 0.106 mm 0.1 ohm 2-3 µ Multiunit & ERP recording & stimulation
IRM23E01KT 50mm 3µ 0.108 mm 0.1 ohm 2-3 µ Multiunit & ERP recording & stimulation
IRM23E05 50mm 3µ 0.106 mm 0.5 ohm 2-3 µ Single, Multiunit & recording stimulation
IRM23E05KT 50mm 3µ 0.108 mm 0.5 ohm 2-3 µ Single, Multiunit & recording stimulation
IRM23E10 50mm 3µ 0.106 mm 0.1 ohm 1-2 µ Single, Multiunit & recording stimulation
IRM23E10KT 50mm 3µ 0.108 mm 0.1 ohm 1-2 µ Single, Multiunit & recording stimulation
IRM23E15 50mm 3µ 0.106 mm 1.5 ohm 1-2 µ Single, Multiunit & recording stimulation
IRM23E15KT 50mm 3µ 0.108 mm 1.5 ohm 1-2 µ
IRM23E20 50mm 3µ 0.106 mm 2.0 ohm 1-2 µ Greater selectivity & microstimulation
IRM23E20KT 50mm 3µ 0.108 mm 2.0 ohm 1-2 µ Greater selectivity & microstimulation
IRM23E25 50mm 3µ 0.106 mm 2.5 ohm 1-2 µ Greater selectivity & small cells
IRM23E25KT 50mm 3µ 0.108 mm 2.5 ohm 1-2 µ Greater selectivity & small cells
IRM23E30 50mm 3µ 0.106 mm 3.0 ohm 1-2 µ Greater selectivity & small cells
IRM23E30KT 50mm 3µ 0.108 mm 3.0 ohm 1-2 µ Greater selectivity & small cells
IRM23E50 50mm 3µ 0.106 mm 5.0 ohm 1-2 µ Greater selectivity & small cells
IRM23E50KT 50mm 3µ 0.108 mm 5.0 ohm 1-2 µ Greater selectivity & small cells

TYPE D
Platinum Iridium Profile D

 

 

 

 

Package of 5
PTM123B05KT

305 mm

3 µ

0.61 mm

0.5 M ohm

1-2 µ

 Deep brain studies
PTM123B10KT

305 mm

3 µ

0.61 mm

1.0 M ohm

1-2 µ

 Deep brain studies
PTM123B20KT

305 mm

3 µ

0.61 mm

2.0 M ohm

1-2 µ

 Deep brain studies
Tungsten

Profile D

 

 

 

 

 Package of 5
TM123A05KT

305mm

3 µ

0.406 mm

0.5 M ohm

1 µ

Deep brain studies
TM123A10KT

305mm

3 µ

0.406 mm

1.0 M ohm

1 µ

Deep brain studies
TM123A20KT

305mm

3 µ

0.406 mm

2.0 M ohm

1 µ

Deep brain studies
Elgiloy®/Stainless

Profile D

 

 

 

 

 Package of 5
SSM123B05KT

305 mm

3 µ

0.61 mm

0.5 M ohm

1-2 µ

 Deep brain studies
SSM123B10KT

305 mm

3 µ

0.61 mm

1.0 M ohm

1-2 µ

 Deep brain studies
SSM123B20KT

305 mm

3 µ

0.61 mm

2.0 M ohm

1-2 µ

 Deep brain studies
 
Eligoy Steel *Cobalt/chromium/nickel alloy. The KT suffix refers to Kapton™ cladding. All Metal Microelectrodes are available in custom lengths, blunt or heat treated (extra charge). Ordering: Add the B suffix where blunt electrodes are desired. (For example, an IRM123A10KT ordered as blunt will be IRM123A10KTB.) Add the H suffix where heat treated electrodes are desired. (For example, an IRM123A10KT ordered with heat treatment will be IRM123A10KTH .)
*Gold-plated pins (#5482) and sockets (#5483) may be attached to 24-, 26-, or 28-gauge wire.

Gold-plated pins (#5482) and sockets (#5483) may be attached to 24-, 26-, or 28-gauge wire.

ACCESSORIES

300102

 Micromanipulator holder, 4 inches, 2mm to .031 sockets
5468 2 mm receptacle to 0.031-inch jack (for Omega-TipZ)
5469 Adapts mini banana plug (DAM80) to 0.031-inch receptacle (metal microelectrode)
5470 0.031-inch jack, 28 ga. wire, 12 inch (pkg of 4)
5482* Pins, 0.031-inch, gold-plated (pkg of 50)
5483* Sockets, 0.031-inch gold-plated (pkg of 50)