Photocell for h-determination

Function and Application

The photocell is used to investigate the photoelectric effect and for the experimental determination of Planck’s constant.
The vacuum-sealed photocell is safely housed in a plastic enclosure and equipped with a removable metal cover.

Benefits

• Robust and stable construction for precise laboratory experiments
• Three-position shutter: circular aperture, entrance slit, or closed, allowing flexible light control
• Aperture tube for the secure insertion of interference filters
• Housing base with holding magnets and a 6 mm threaded hole for easy mounting on the supplied support rod

Technical Specification

• 4 mm connection sockets
• Diameter of active area: 15 mm
• Wavelength range: 185–650 nm
• Maximum sensitivity at: 340 nm
• Cathode material: Cs-Sb
• Anode material: K-Sb-Cs
• Sensitivity: 110 µA/lm or 70 mA/W
• Maximum cathode current: 6 µA
• Maximum voltage: 100 V
• Operating voltage: 15 V
• Dark current at 15 V: 2.0 pA
• Cell capacitance: 2 pF