BIOPAC Systems Epoch - EEG Sensor Electrode Spacing; Differential Sensor Electrode Spacing

Epoch™ User Guide Page 4 of 23
10166_Rev08 WWW.BIOPAC.COM 9.9.2019
Technical details of the Dual-Channel EEG and Dual-Channel Differential sensors are as follows:
Channels: 2
Reference: Dual-Channel EEG: Common
Dual-Channel Differential: Differential
Electrodes: Dual-Channel EEG: 3
Dual-Channel Differential: 4
Footprint: 8 mm x 9 mm (2 mo), 8 mm x 12 mm (6 mo)
Weight: 2.3 g (2 mo), 4.0 g (6 mo)
Volume: 0.76 cm
3
(2 mo), 1.35 cm
3
(6 mo)
System Gain Options: 800x -- (±2.5 mV range, 2.5 mV in = 2 V out)
2000x -- (±1.0 mV range, 1.0 mV in = 2 V out)
4000x – (0.5 mV range, 500 µV in = 2 V out)
Bandwidth: 0.1 – 100 Hz per channel
Input Referred Noise: < 7.0 μV rms
EEG Sensor Electrode Spacing
Figure 3. Dual-channel EEG sensor electrode spacing schematic looking down
at animal’s head. The electrodes go through the page.
Differential Sensor Electrode Spacing
Figure 4. Dual-channel Differential sensor electrode spacing schematic looking down
at animal’s head. The electrodes go through the page.