Σigma Additional Monitoring Channels

Each Base Unit for the Σigma includes two EEG channels. However, for clinicians who would like additional monitoring channels, up to five additional monitoring channels may be added to a Σigma base model, totally seven monitoring channels. The maximum number of monitoring channels available would include: four channels of EEG, one Optical Motion Sensor (not available in the US and Canada) one EMG and one ECG.