Teltron Dual Beam Tube D
Product Code : JLI-PLE-10586
Quick Answer: The Teltron Dual Beam Tube D is a semi-evacuated tube filled with low-pressure helium, with tangential and axial electron guns, for studying gas excitation and particle collisions and for determining the electron charge-to-mass ratio. The product is the tube only.
Last updated: 18 October 2026
Key Features
- Tangential and axial electron guns in one helium-filled tube.
- Axial beam in a co-axial magnetic field shows impact excitation and particle collisions as fine luminous beams.
- Tangential beam in a perpendicular magnetic field gives e/m from the diameter of the beam pattern.
- Supplied as the tube only.
Technical Specifications
| Specification | Value |
|---|---|
| Gas filling | Low-pressure helium |
| Electron guns | Tangential and axial |
| Anode current | Approx. 30 mA at 200 V |
| Max. deflection voltage | 50 V DC |
| Max. filament voltage | 7.5 V |
| Max. anode voltage | 300 V DC |
How It Is Used
Electrons from the guns excite the helium atoms, so the beams glow and can be followed by eye. With the tangential gun and a perpendicular field the beam bends into a pattern whose diameter is used to calculate e/m; with the axial gun and a co-axial field, collision and excitation effects can be observed.
Frequently Asked Questions
Is anything else included with the Teltron Dual Beam Tube D?
No. The product includes the tube only.
What can be measured with the Teltron Dual Beam Tube D?
With tangential bombardment in a perpendicularly aligned magnetic field, the electron charge-to-mass ratio can be determined from the diameter of the beam pattern.
Related Physics Lab Equipment
See the full physics lab equipment range, or these related D-series tube apparatus:
- Teltron Helmholtz Pair of Coils D
- Teltron Tube Holder D
- Teltron Electron Deflection Tube D
- Teltron Electron Diffraction Tube D
For a quotation on the Teltron Dual Beam Tube D, contact JLab India on +91-8569909696.
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