Concentric Bipolar

Concentric Bipolar Microelectrodes are widely used for stimulation in both slice and in vivo setups. We can custom tailor all design parameters to fit individual needs. As an example, we have worked with many customers that needed CB’s to be bent to varying angles to fit under their microscope objective. CB’s are ideal for large field stimulation in fresh tissue slices.

These electrodes terminate with a flexible wire and are intended to be cemented in place at the skull in research applications requiring microelectrode recording or stimulation with freely moving subjects. 

For Research Only – Not For Human Use

These concentric bipolar microelectrodes are designed for acute research and can be used to stimulate multiple cells.

Detailed specifications and technical information can be found under the Technical Documents tab.

Sold in packages of 3.

These microelectrodes have a Platinum-Iridium inner pole and a Stainless Steel outer pole.

SKU Tip Diameter Outer/Inner Pole Length
30200 Rounded 125/25 µm 75mm
30201 Extended 125/25 µm 50mm
30202 Cone 125/25 µm 50mm
30203  Cone 125/12.5 µm 50mm
30204 Extended 125/12.5 µm 50mm
30205 Rounded 200/25 µm 75mm
30077* Extended   Detachable 65mm tubing
30213 Cone 125/25 µm  75mm
30214 Extended 125/25 µm  75mm
30215 Cone 200/50 µm  75mm

*The 30077 Mass General Concentric Bipolar Microelectrode has a built in ground cannula 


Refrence the table below  if you are looking for a common custom Concentric Bipolar microelectrode number

Custom Microelectrode Code Closest/Matching Standard Number Differences
CBARC75 30200 Exact Match
CBBRC75 30205 Exact Match (contact FHC to order)
CBAEC75 30201 Same base product, but the standard microelectrode is 25mm shorter (contact FHC to order)
CBBRF50 30205 Inner pole diameter is 50 microns, standard IP is 25 microns.  Length is 50mm, standard length is 75mm (contact FHC to order)
CBBRF75 30205 Inner pole diameter is 50 microns, standard IP is 25 microns (contact FHC to order)

Concentric Bipolar Spec Sheet


The Mass General CB Special Specifications


Cleaning and Sterilization of Research Microelectrodes


Rajalingham R, Musallam S (2017) Characterization of neurons in the primate medial intraparietal area reveals a joint representation of intended reach direction and amplitude. PLoS ONE 12(8): e0182519.

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Li Feng, Joshua E. Motelow, Chanthia Ma, William Biche, Cian McCafferty, Nicholas Smith, Mengran Liu, Qiong Zhan, Ruonan Jia, Bo Xiao, Alvaro Duque and Hal Blumenfeld. Seizures and Sleep in the Thalamus: Focal Limbic Seizures Show Divergent Activity Patterns in Different Thalamic Nuclei. Journal of Neuroscience 22 November 2017, 37 (47) 11441-11454

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Hsu, L., Zelenin, P. V., Orlovsky, G. N. and Deliagina, T. G. (2017), Supraspinal control of spinal reflex responses to body bending during different behaviours in lampreys. J Physiol, 595: 883-900.

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Yong-Jun Liu; Maziar Hashemi-Nezhad; David C. Lyon Differences in orientation tuning between pinwheel and domain neurons in primary visual cortex depend on contrast and size. Neurophotonics, 4(3), 031209 (2017).

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DeWind NK, Peng J, Luo A, Brannon EM, Platt ML (2017) Pharmacological inactivation does not support a unique causal role for intraparietal sulcus in the discrimination of visual number. PLoS ONE 12(12): e0188820.

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Masri, S., Zhang, L. S., Luo, H., Pace, E., Zhang, J., & Bao, S. (2018). Blast Exposure Disrupts the Tonotopic Frequency Map in the Primary Auditory Cortex. Neuroscience, 379, 428–434.

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