Fine Beam Tube (Neon-Filled) with Connector Base Manufacturer,Supplier and Exporter in Africa
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Product Code : DA-AAN-11410
Quick Answer: The Fine Beam Tube (Neon-Filled) with Connector Base produces a narrow, luminescent electron beam for investigating the deflection of cathode rays in a uniform magnetic field. Built-in measurement marks allow a parallax-free reading of the diameter of the beam's circular path.
Last updated: October 2026
Key Features
- Neon gas atoms ionise along the path to give a well-defined luminescent beam
- Electron gun with indirectly heated oxide cathode, Wehnelt cylinder and perforated anode
- Measurement marks with 20 mm division spacing
- Protective circuit in the base cuts off excess voltage
- Base with coloured connectors
- Requires a 0-300 V DC power supply and 300 mm Helmholtz coils
Technical Specifications
| Specification | Value |
|---|---|
| Tube diameter | 160 mm |
| Division spacing | 20 mm |
| Diameter of fine beam path | 20 to 120 mm |
| Anode voltage | 200 to 300 V |
| Anode current | < 0.3 mA |
| Filament voltage | 4 to 12 V DC |
| Filament current | 300 to 450 mA |
| Total height incl. base | 260 mm |
| Base plate | 115 x 115 x 35 mm |
| Weight | Approx. 820 g |
About This Product
Set between a pair of 300 mm Helmholtz coils, the tube shows the electron beam bent into a circular path by a uniform magnetic field. Reading the circle's diameter against the built-in marks allows a quantitative determination of the specific charge of the electron, e/m. A protective circuit in the base shuts off any voltage above its pre-set cut-off and gives a smooth switch-on, so excessive voltages cannot damage the heater filament. Didactic Africa can supply and export the Fine Beam Tube (Neon-Filled) with Connector Base to schools, colleges and distributors in Argentina, Sierra Leone, Slovenia, São Tomé and Príncipe, Palestine and India.
Frequently Asked Questions
Q1. What else is needed to use the Fine Beam Tube (Neon-Filled) with Connector Base?
A 0-300 V DC power supply and a pair of 300 mm Helmholtz coils.
Q2. How is the tube protected?
A protective circuit built into the base shuts off any voltage above the pre-set cut-off and ensures a smooth switch-on, preventing excessive voltages from damaging the heater filament.
Q3. What beam path diameters can be measured?
The circular beam path can be 20 to 120 mm in diameter, read against measurement marks with 20 mm division spacing.
Related: Atoms and Nuclei range, Helmholtz Coils for Use with Fine Beam Tube, Teltron Dual Beam Tube, Deflection E-M Tube.
For a quotation on the Fine Beam Tube (Neon-Filled) with Connector Base, contact Didactic Africa.
