Diameter: 13mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 10mm, Spectral response range: 300-650nm)

Diameter: 19mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 15mm, Spectral response range: 300-650nm)

Diameter: 19mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 15mm, Spectral response range: 300-650nm)

Diameter: 25mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 22mm, Spectral response range: 300-650nm)

Diameter: 28mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 25mm; Spectral response range: 300-650nm)

Diameter: 28mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 25mm; Spectral response range: 300-650nm)

Diameter: 28mm, head-on type, photocathode material is bialkali ( Effective photosensitive surface diameter: 25mm; Spectral response range: 300-650nm)

Diameter: 38mm, head-on type, photocathode material is multi-alkali ( Effective photosensitive surface diameter: 34mm, Spectral response range: 300-850nm)