Function and Application

Device for the examination of the photoeffect and the determination of Planck's constant. Vacuum photocell mount into a housing with detachable metal cover.

Technical Data

• Shutter slide with three positions: round opening, entrance slit, shut
• The housing has a mount where interference filters or lens holders can be fit on
• The floor of the housing possesses two holding magnets and a 6 mm thread for the holding rod
• 4 mm sockets for electrical connections
• Cell acive diameter : 15 mm
• Wavelength range: 185...650 nm
• Highest sensitivity at: 340 nm
• Cathode material: Cs-Sb
• Sensitivity: 110 µA/lm or 70 mA/W
• Maimum cathode current: 6 µA
• Maximum voltage: 100 V
• Operating voltage: 15 V
• Dark current at 15 V: 2,0 pA
• Cell capacity: 2 pF