I want to understand what the electrode impedance values given on spec sheet mean. Just looking to gain a general understanding and what voltages/ currents I can or cannot use. The electrodes are used to record voltage spikes of around 50-90 mV.

"""Electrode Diameter: 10 um or 30 um
Electrode impedance: <100 kilo ohms for 30 um electrodes....250-400 kilo ohms for 10 um electrodes"""

The link to the data sheet can be found here: http://www.multichannelsystems.com/sites/multichannelsystems.com/files/60StandardMEA_Layout.pdf

  • \$\begingroup\$ What is your intended use? Without looking, those are likely recording electrodes, and not great for passing DC current \$\endgroup\$ – Scott Seidman Nov 8 '17 at 0:51
  • \$\begingroup\$ The lower the impedance, the wider diameter chunk of brain you'll see signals from. \$\endgroup\$ – Scott Seidman Nov 8 '17 at 0:52
  • \$\begingroup\$ My intended use is for recording small voltage signals(50-90 mV) from tissue samples. Would you guys consider this relatively low or high impedance? \$\endgroup\$ – Bennis Nov 8 '17 at 21:11
  • \$\begingroup\$ Low impedance, if you're looking for single neurons, one at a time. The higher impedance option is probably OK for capturing a few units per tip, and the lower impedance would be for a wider area \$\endgroup\$ – Scott Seidman Nov 8 '17 at 22:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.