Yes this seems like the range you are looking for. I would go more by your actual measurements, than 'predictions'. Saline caps should have impedances just as low as gel or paste.

Regarding your point (1), you can read some of the background on the Cyton (ADS1299 chip) impedance considerations at this comment below. ... If you are using wet / gel electrodes you can expect much

Regarding point (2), it is not possible to include real-time impedance measures in the data stream. The Daisy sample rate is indeed 125 Hz as stated.

Regarding your point (1), you can read some of the background on the Cyton (ADS1299 chip) impedance considerations at this comment below. This comment is from a discussion thread about what are approp

1) For faster impedance checks, we start the branch https://github.com/OpenBCI/OpenBCI_GUI/tree/1204-cyton-impedance-checks-incorrect-at-low-resistances from processing.

I doubted something clashed. I did impedance-check. Electrodes had around 5～50Ω impedance. Are these high? I checked other thread in this forum like this.

https://www.analog.com/en/resources/technical-articles/transthoracic-impedance-measurements-in-patient-monitoring.html

Hello，I was wondering if there was a tutorial on measuring respiratory impedance with Ganglion?

The following figure shows our impedance test, the red channel is mainly due to the sideburns, and most of the channel impedance is quite ideal

Any wet electrode system should be able to get impedance below say 50K, even 20K, 5K.

When using the HYDRO-LINK wet electrodes for acquisition, what is the normal range of impedance?

Assuming you read the link on what impedance Ultracortex (dry electrodes) are typically seeing. Dry electrodes cannot achieve the low impedances seen with wet electrodes.

Thanks, William. One of the turorials I saw online using Ganglion said to run impedance check and make sure the lights are green:

There is an informative Forum post regarding dry electrodes with Cyton at this link. Essentially, dry silver chloride electrodes cannot achieve the 50K or lower impedances seen with 'wet' electrodes t

I recently got a strarter kit with Gaglion board and dry electrodes. I also looked at some tutorials and saw that I needed to do an Impedance check to make sure the lights next to each channel are gr

Yes these are impedance values in ohms. This is shown in the drop down menu at upper right corner of your image.

May I ask if the status value displayed in the Cyton Signal Widget is the impedance value of each channel? Thank you.

thanks for the quick response. I guess I have an older version, since my impedance values are way lower than the ones described in the thread you’ve posted.

Current versions of the GUI have a bug that is reporting the wrong impedance when used with calibration resistors. See the discussion at,

currently, we are in the process of measuring impedence from a cyton board as well. We connect to the board with Webserial API and send the respective commands to the Board to activate impedance check