Teltron Dual Beam Tube Manufacturer,Supplier and Exporter in Africa
Product Code : DA-AAN-11412
Quick Answer: The Teltron Dual Beam Tube is a partly evacuated, helium-filled electron tube with both axial and perpendicular electron guns. The beams show as fine, slightly greenish lines from impact excitation of the helium atoms.
Last updated: October 2026
Key Features
- Axial and perpendicular electron guns with a common deflector plate
- Helium at low pressure makes the beams visible
- Oxide cathode heated indirectly via a heating coil
- Glass bulb approx. 130 mm dia., total length approx. 260 mm
- Requires a 300 V or 500 V DC power supply
Technical Specifications
| Specification | Value |
|---|---|
| Anode voltage | Max. 100 V DC |
| Anode current | Max. 30 mA |
| Deflector voltage | Max. 50 V DC |
| Filament voltage | Max. 7.5 V AC/DC |
| Glass bulb | Approx. 130 mm dia. |
| Total length | Approx. 260 mm |
About This Product
One tube offers two ways of finding the specific charge e/m. Electrons from the perpendicular gun, in a vertically aligned magnetic field, follow a path whose diameter is measured; electrons fired axially into a coaxial magnetic field follow a spiral path that can be observed. The two beams run perpendicular to each other and share a deflector plate. Export supply of the Teltron Dual Beam Tube can be arranged to laboratories and schools in Eswatini, Djibouti, Venezuela, Lebanon and Brazil.
Frequently Asked Questions
Q1. How does the Teltron Dual Beam Tube determine e/m?
From the diameter of the path of electrons fired from the perpendicular gun into a vertically aligned magnetic field, and by observing the spiral path of electrons fired axially into a coaxial magnetic field.
Q2. Why are the beams visible?
The tube holds helium at low pressure, and impact excitation of the helium atoms shows the electron paths as a fine, slightly greenish beam.
Q3. What power supply does it need?
A 300 V or 500 V DC power supply.
Related: Atoms and Nuclei range, Helmholtz Coils for Use with Fine Beam Tube, Fine Beam Tube (Neon-Filled) with Connector Base, Universal Stand.
For a quotation on the Teltron Dual Beam Tube, contact Didactic Africa.
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