Highly evacuated electron tube for demonstrating the wave nature of electrons through the observation of interference caused by passage of electrons through a polycrystalline graphite lattice (Debye-Scherrer diffraction) and rendered visible on a fluorescent screen.
The range of demonstration discharge tubes has been designed to show the properties of the free electron.
The D range is the range with connections fixed on the tubes.
The S range is a newer range with connections on the stand rather than the tubes.  Please note the ranges are not interchangeable.
Electron Diffraction Tube D
Also intended for determining the wavelength as a function of the anode voltage from the radii of the diffraction rings and the lattice plane spacing of graphite, as well as confirming
de Broglie’s hypothesis. Instructions included.
EHT Power Supply
Digital Meter with two shunts included

Specifications:
Anode current: approx. 0.1 mA at 4 kV
Max. anode voltage: 5 kV
Max. filament voltage: 6.3 V AC
Lattice constant of graphite: d10 = 0.213 nm; d11 = 0.123 nm.

Physics School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Electron Diffraction Tube D Atomic and Nuclear Physics Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Physics Lab Experiments for Engineering Teaching Lab in Universities