The BioSemi headcap has been developed in cooperation with Dr. Peter Praamstra at the Behavioral Brain Sciences Center, University of Birmingham, United Kingdom. The headcap consists of an elastic cap with plastic, electrode holders. The cap itself does not contain electrodes. The cap is placed on the subject's head, and the electrode holders are filled with electrode gel with a syringe. Because of the active electrode setup, high electrode impedance's can be tolerated, so no skin preparation is required. Thus, the usual, unpleasant and time consuming scrubbing of the scalp after the paste is applied can be omitted. After the buttons are filled with paste, the active electrodes are plugged in the cap one by one. The procedure is fast and reliable (5-10 minutes for 32 channels), and allows high density EEG measurement with a minimum of preparation time and subject discomfort.  Caps with a , can be delivered straight from stock. The electrode position coordinates of standard BioSemi headcaps are downloadable. Since the electrode holders make the caps a little bit smaller, please order your caps half a size bigger. (so if you want a Medium cap, please order a Medium/Large cap). Standard, the caps have ear-slits for easy accessing of the ears. Surgical caps are available on demand. Different electrode layouts are possible on client specification. It is also possible to assemble your own cap layout. Caps are delivered complete with a 5" (12cm) velcro chin strap (7" strap is included starting from ML sizes). Information about infant head circumference sizes can be found on this page.
 
Available sizes:
 
Ordercode
Size
Number of electrodes
Layout
Labelling
Color
Size displayed inside the cap
Always on stock
CAP INFA3-16
INFA3
16
1020
1020
Brown
34-38cm
.
CAP INFA3-32
INFA3
32
1020
1020
Brown
34-38cm
.
CAP INFA3-64
INFA3
64
Radial
1020
Brown
34-38cm
.
CAP INFA3-16 ABC
INFA3
16
1020
ABC
Brown
34-38cm
.
CAP INFA3-32 ABC
INFA3
32
1020
ABC
Brown
34-38cm
.
CAP INFA3-64 ABC
INFA3
64
1020
ABC
Brown
34-38cm
.
CAP INFA2/3-16
INFA2/3
16
1020
1020
Pink/Brown
36-40cm
.
CAP INFA2/3-32
INFA2/3
32
1020
1020
Pink/Brown
36-40cm
.
CAP INFA2/3-64
INFA2/3
64
1020
1020
Pink/Brown
36-40cm
.
CAP INFA2/3-16 ABC
INFA2/3
16
1020
ABC
Pink/Brown
36-40cm
.
CAP INFA2/3-32 ABC
INFA2/3
32
1020
ABC
Pink/Brown
36-40cm
.
CAP INFA2/3-64 ABC
INFA2/3
64
1020
ABC
Pink/Brown
36-40cm
.
CAP INFA2-16
Infa 2
16
1020
1020
Pink
38-42cm
.
CAP INFA2-32
Infa 2
32
1020
1020
Pink
38-42cm
.
CAP INFA2-64
Infa 2
64
1020
1020
Pink
38-42cm
.
CAP INFA2-16 ABC
Infa 2
16
1020
ABC
Pink
38-42cm
.
CAP INFA2-32 ABC
Infa 2
32
1020
ABC
Pink
38-42cm
.
CAP INFA2-64 ABC
Infa 2
64
1020
ABC
Pink
38-42cm
.
CAP INFA1/2-16
Infa 1/2
16
1020
1020
Light Blue/Pink
40-44cm
.
CAP INFA1/2-32
Infa 1/2
32
1020
1020
Light Blue/Pink
40-44cm
.
CAP INFA1/2-64
Infa 1/2
64
1020
1020
Light Blue/Pink
40-44cm
.
CAP INFA1/2-16 ABC
Infa 1/2
16
1020
ABC
Light Blue/Pink
40-44cm
.
CAP INFA1/2-32 ABC
Infa 1/2
32
1020
ABC
Light Blue/Pink
40-44cm
.
CAP INFA1/2-64 ABC
Infa 1/2
64
1020
ABC
Light Blue/Pink
40-44cm
.
CAP INFA1-16
Infa 1
16
1020
1020
Light Blue
42-46cm
.
CAP INFA1-32
Infa 1
32
1020
1020
Light Blue
42-46cm
.
CAP INFA1-64
Infa 1
64
1020
1020
Light Blue
42-46cm
.
CAP INFA1-16 ABC
Infa 1
16
1020
ABC
Light Blue
42-46cm
.
CAP INFA1-32 ABC
Infa 1
32
1020
ABC
Light Blue
42-46cm
.
CAP INFA1-64 ABC
Infa 1
64
1020
ABC
Light Blue
42-46cm
.
CAP XS/INFA1-16
Extra Small/ Infa 1
16
1020
1020
Green/ Light Blue
44-48cm
..
CAP XS/INFA1-32
Extra Small/ Infa 1
32
1020
1020
Green/ Light Blue
44-48cm
..
CAP XS/INFA1-16
Extra Small/ Infa 1
16
1020
1020
Green/ Light Blue
44-48cm
..
CAP XS/INFA1-64 ABC
Extra Small/ Infa 1
64
1020
ABC
Green/ Light Blue
44-48cm
.
CAP XS/INFA1-32 ABC
Extra Small/ Infa 1
32
1020
ABC
Green/ Light Blue
44-48cm
.
CAP XS/INFA1-64 ABC
Extra Small/ Infa 1
64
1020
ABC
Green/ Light Blue
44-48cm
.
CAP XS 16
Extra Small
16
1020
1020
Green
46-50cm
CAP XS 32
Extra Small
32
1020
1020
Green
46-50cm
CAP XS 64
Extra Small
64
1020
1020
Green
46-50cm
CAP XS 128
Extra Small
128
Radial
ABC
Green
46-50cm
CAP XS 16 ABC
Extra Small
16
1020
ABC
Green
46-50cm
.
CAP XS 32 ABC
Extra Small
32
1020
ABC
Green
46-50cm
.
CAP XS 64 ABC
Extra Small
64
1020
ABC
Green
46-50cm
.
CAP SXS 16
Small/Extra Small
16
1020
1020
Yellow/Green
48-52cm
CAP SXS 32
Small/Extra Small
32
1020
1020
Yellow/Green
48-52cm
CAP SXS 64
Small/Extra Small
64
1020
1020
Yellow/Green
48-52cm
CAP SXS 128
Small/Extra Small
128
Radial
ABC
Yellow/Green
48-52cm
CAP SXS 16 ABC
Small/Extra Small
16
1020
ABC
Yellow/Green
48-52cm
.
CAP SXS 32 ABC
Small/Extra Small
32
1020
ABC
Yellow/Green
48-52cm
.
CAP SXS 64 ABC
Small/Extra Small
64
1020
ABC
Yellow/Green
48-52cm
.
CAP S 16
Small
16
1020
1020
Yellow
50-54cm
CAP S 32
Small
32
1020
1020
Yellow
50-54cm
CAP S 64
Small
64
1020
1020
Yellow
50-54cm
CAP S 128
Small
128
Radial
ABC
Yellow
50-54cm
CAP S 160
Small
160
Radial
ABC
Yellow
50-54cm
CAP S 16 ABC
Small
16
1020
ABC
Yellow
50-54cm
.
CAP S 32 ABC
Small
32
1020
ABC
Yellow
50-54cm
.
CAP S 64 ABC
Small
64
1020
ABC
Yellow
50-54cm
.
CAP MS 16
Medium/Small
16
1020
1020
Red/Yellow
52-56cm
CAP MS 32
Medium/Small
32
1020
1020
Red/Yellow
52-56cm
CAP MS 64
Medium/Small
64
1020
1020
Red/Yellow
52-56cm
CAP MS 128
Medium/Small
128
Radial
ABC
Red/Yellow
52-56cm
CAP MS 160
Medium/Small
160
Radial
ABC
Red/Yellow
52-56cm
.
CAP MS 16 ABC
Medium/Small
16
1020
ABC
Red/Yellow
52-56cm
.
CAP MS 32 ABC
Medium/Small
32
1020
ABC
Red/Yellow
52-56cm
.
CAP MS 64 ABC
Medium/Small
64
1020
ABC
Red/Yellow
52-56cm
.
CAP M 16
Medium
16
1020
1020
Red
54-58cm
CAP M 32
Medium
32
1020
1020
Red
54-58cm
CAP M 64
Medium
64
1020
1020
Red
54-58cm
CAP M 128
Medium
128
Radial
ABC
Red
54-58cm
CAP M 160
Medium
160
Radial
ABC
Red
54-58cm
.
CAP M 256
Medium
256
Radial
ABC
Red
54-58cm
CAP M 16 ABC
Medium
16
1020
ABC
Red
54-58cm
.
CAP M 32 ABC
Medium
32
1020
ABC
Red
54-58cm
.
CAP M 64 ABC
Medium
64
1020
ABC
Red
54-58cm
.
CAP ML 16
Medium/Large
16
1020
1020
Red/Blue
56-60cm
CAP ML 32
Medium/Large
32
1020
1020
Red/Blue
56-60cm
CAP ML 64
Medium/Large
64
1020
1020
Red/Blue
56-60cm
CAP ML 128
Medium/Large
128
Radial
ABC
Red/Blue
56-60cm
CAP ML 160
Medium/Large
160
Radial
ABC
Red/Blue
56-60cm
.
CAP ML 256
Medium/Large
256
Radial
ABC
Red/Blue
56-60cm
CAP ML 16 ABC
Medium/Large
16
1020
ABC
Red/Blue
56-60cm
.
CAP ML 32 ABC
Medium/Large
32
1020
ABC
Red/Blue
56-60cm
.
CAP ML 64 ABC
Medium/Large
64
1020
ABC
Red/Blue
56-60cm
.
CAP L 16
Large
16
1020
1020
Blue
58-62cm
CAP L 32
Large
32
1020
1020
Blue
58-62cm
CAP L 64
Large
64
1020
1020
Blue
58-62cm
CAP L 128
Large
128
Radial
ABC
Blue
58-62cm
CAP L 160
Large
160
Radial
ABC
Blue
58-62cm
.
CAP L 256
Large
256
Radial
ABC
Blue
58-62cm
CAP L 16 ABC
Large
16
1020
ABC
Blue
58-62cm
.
CAP L 32 ABC
Large
32
1020
ABC
Blue
58-62cm
.
CAP L 64 ABC
Large
64
1020
ABC
Blue
58-62cm
.
CAP LXL 16
Large/Extra Large
16
1020
1020
Blue/Brown
60-64cm
.
CAP LXL 32
Large/Extra Large
32
1020
1020
Blue/Brown
60-64cm
.
CAP LXL 64
Large/Extra Large
64
1020
1020
Blue/Brown
60-64cm
.
CAP LXL 128
Large/Extra Large
128
Radial
ABC
Blue/Brown
60-64cm
.
CAP LXL 160
Large/Extra Large
160
Radial
ABC
Blue/Brown
60-64cm
.
CAP LXL 256
Large/Extra Large
256
Radial
ABC
Blue/Brown
60-64cm
.
CAP LXL 16 ABC
Large/Extra Large
16
1020
ABC
Blue/Brown
60-64cm
.
CAP LXL 32 ABC
Large/Extra Large
32
1020
ABC
Blue/Brown
60-64cm
.
CAP LXL 64 ABC
Large/Extra Large
64
1020
ABC
Blue/Brown
60-64cm
.
CAP XL 16
Extra Large
16
1020
1020
Brown
62-66cm
.
CAP XL 32
Extra Large
32
1020
1020
Brown
62-66cm
.
CAP XL 64
Extra Large
64
1020
1020
Brown
62-66cm
.
CAP XL 128
Extra Large
128
Radial
ABC
Brown
62-66cm
.
CAP XL 160
Extra Large
160
Radial
ABC
Brown
62-66cm
.
CAP XL 256
Extra Large
256
Radial
ABC
Brown
62-66cm
.
CAP XL 16 ABC
Extra Large
16
1020
ABC
Brown
62-66cm
.
CAP XL 32 ABC
Extra Large
32
1020
ABC
Brown
62-66cm
.
CAP XL 64 ABC
Extra Large
64
1020
ABC
Brown
62-66cm
.
2s
 
     
Available layouts:
Nr. of electrodes
Labeling system
Cap holders size
16
10/20 or ABC
17mm (Infant sizes use 14mm)
32
10/20 or ABC
17mm (Infant sizes use 14mm)
64
10/20 or ABC
17mm (Infant sizes use 14mm)
64
10/20 or ABC
17mm (Infant sizes use 14mm)
128
ABC
14mm
160
ABC
14mm
256
ABC
11mm
 
     
 
 

 

256 channels
Medium (Red)
ABC layout
ABC labelling


 

160 channels
Medium (Red)
ABC layout
ABC labelling


 

128 channels
Large (Blue)
ABC layout
ABC labelling


 

64 channels Surgical
Medium/Small (Red/Yellow)
10/20 layout
10/20 labelling


 

64 channels
Medium (Red)
10/20 layout
10/20 labelling


 

32 channels
Large (Blue)
10/20 layout
10/20 labelling


 

16 channels
Medium/Large (Blue/Red)
10/20 layout
10/20 labelling