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	> Home / Biosensing / pH Meters & Electrodes / Metal Microelectrodes

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	Metal Microelectrodes

	We stock a huge range of metal electrodes for various applications.

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.

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

Heat Treated Tip (above) is ideal for penetrating 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 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.

Item	Metal Core	Length	Imp	Probe Outer Diameter	Tip	Core diam.	Y dim.	X dim. w/ polyimide
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

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
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
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
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)
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
Pure Iridium	Profile C					Package of 5

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	Single, Multiunit & recording stimulation
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

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
Elgiloy 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.

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)

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