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The Thomas RECORDING Multitrode is also available for the Thomas Motorized Electrode Manipulator (MEM). The multitrode for the MEM is a robust, multiuse, multicontact stainless steel electrode with an electrode array consisting of 8 gold contacts. The contact diameter is 40µm with a spacing of 125µm between the contacts. In the MEM the multitrode is guided in a stainless steel guide tube. An 8 channel preamplifier for the multitrode is available on request.

Key features:

  • Adapted to the Thomas MEM System
  • Durable, multi-use, multi-site linear probe
  • 7 + 1 electrode sites embedded in a stainless steel needle
  • Electrode contact material: Gold
  • Electrode contact diameter: 40µm
  • Electrode contact spacing: 125µm 
  • Low price
Technical Data

Technical Data of the Thomas RECORDING Multitrodes

FeatureMultitrode Type IMultitrode Type II
Total length128mm99mm
Frontal probe section length77mm48mm
Frontal probe section diameter300µm300µm
Top probe section lenght22mm 
Top probe section diameter640µm 
Electrode reinforcement tube material Stainless steelStainless steel
Number of electrode contacts8 = 7 (linear array) + 1 (tip contact) 8 = 7 (linear array) + 1 (tip contact)
Electrode array contact diameter40µm40µm
Electrode array contact spacing125µm125µm
Electrode array total lengthapp. 750µmapp. 750µm
Distance tip-first array contactapp. 650-700µmapp. 650-700µm
Electrode contact materialGoldGold
Connection interfacePrinted circuit board (pcb)Printed circuit board (pcb)


The Thomas Multitrode is available in two different lengths:

Type MEM40: Total length = 128mm

Type MEM10: Total length = 99mm

The frontal probe section of the Multitrode is adapted to the guide tube length and the electrode travel of the Thomas MEM (see drawings in figure 1 and 2). At the top end of the multitrode is a printed circuit board with connection cables or with an Omnetics connector. The probe connector is a compact multicontact connector, but other connectors are available on request. The probe tip is electrically connected to the electrode connector as an eights electrode contact and has a distance of app. 650-700µm to the first electrode array contact (for details see data sheet).

Figure 1: Thomas RECORDING Multitrode for MEM with 10mm electrode travel

Figure 2: Thomas RECORDING Multitrode for MEM with 40mm electrode travel


[5] Fan, Y., Gold, J. I., & Ding, L. (2020). Frontal eye field and caudate neurons make different contributions to reward-biased perceptual decisions. Elife9, e60535. DOI:

[4] Haab L., Mortezapouraghdam, Z., Schubert, K., Szczygielski, J., Schwerdtfeger, K. and Strauss, D.; Analysis of Dominant Neural Activity Clustering in Laminar Cortical Processing of Acoustic Stimuli in Rat utilizing Von Mises-Fisher Distribution; Conference on Neural Engineering (NER), 2013 6th International IEEE/EMBS

[3] Sumito Okuyama, Toshinobu Kuki, Hajime Mushiake; Representation of the Numerosity‘zero’ in the Parietal Cortex of the Monkey; Scientific Reports, 5:10059, DOI: 10.1038/srep10059;

[2] Sung-min Park, Esra Tara, Kamran Khodakhah; Efficient generation of reciprocal signals by Inhibition; J. Neurophysiol 107:2453-2462, 2012. First published 1 February 2012;doi:10.1152/jn.00083.2012

[1] Antonio G. Zippo, Riccardo Storchi, Sara Nencini, Gian Carlo Caramenti, Maurizio Valente, Gabriele Eliseo M. Biella; Neuronal Functional Connection Graphs among Multiple Areas of the Rat somatosensory System during Spontaneous and Evoked Activities; PLOS Computational Biology,, June 2013, Volume 9, Issue 6, e1003104

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