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Teltron Dual Beam Tube D
Teltron Dual Beam Tube D (Product Code: SLE/PHY/51) is a semi-evacuated electron tube filled with low-pressure helium and fitted with both a tangential and an axial electron gun, used to study electron collisions and the electron charge-to-mass ratio in physics laboratories. Excited helium atoms make the beams glow as fine luminescent lines, so students see the electron path directly. It is supplied as the tube only by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Tube type | Semi-evacuated, filled with low-pressure helium |
| Electron guns | Tangential and axial |
| Max. filament voltage | 7.5 V |
| Max. anode voltage | 300 V DC |
| Anode current | Approx. 30 mA at 200 V (anode) |
| Max. deflection voltage | 50 V DC |
| Scope of supply | Tube only; instructions included |
| Product code | SLE/PHY/51 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the Dual Beam Tube Used For?
Fire the axial gun with a magnetic field along the tube axis and the fine, luminous beam lets students study impact excitation and particle collisions — a visual link between electron physics and kinetic gas theory. Switch to the tangential gun with the field perpendicular, and the beam bends into a closed pattern whose diameter gives the fundamental electron charge-to-mass ratio, a classic specific charge electron experiment.
Because the Teltron Dual Beam Tube D is sold as the tube only, plan the full set-up before ordering: a D-series holder, a Helmholtz coil pair for the magnetic field, and a supply able to provide up to 300 V DC on the anode, 7.5 V on the filament and 50 V DC for deflection. Departments that already own Teltron D-series accessories can simply add the tube.
What to Specify When Ordering
- Whether you need the Teltron Tube Holder D and Teltron Helmholtz Pair of Coils D, since the product is the tube only.
- A power supply covering 300 V DC anode, 7.5 V filament and 50 V DC deflection.
- A meter for monitoring the coil current.
- Number of tubes required.
Supplier
ScienceLab is how Jain Scientific Equipments Private Limited trades, and the company supplies the Teltron Dual Beam Tube D from Ambala, Haryana, India. Teltron is a third-party brand; the company sources the tube and, because it ships as the tube only, can quote the holder, coils and supply alongside it. See our company profile.
Related Physics Lab Equipment
The Teltron Dual Beam Tube D is supplied as the tube only; these items complete the experiment:
- Teltron Tube Holder D — holder for the Teltron D-series tubes and coils.
- Teltron Helmholtz Pair of Coils D — provides the magnetic field that bends the beam.
- High Tension Power Supply — designed for thermionic experiments such as the Teltron double fine beam tube.
- Digital Voltmeter/Ammeter With Shunts — monitors the coil current.
- Teltron Dual Beam Tube S — the S-series version of this tube.
Visit the Physics Lab Equipment category for more.
Frequently Asked Questions
What is included with the Teltron Dual Beam Tube D?
The Teltron Dual Beam Tube D is supplied as the tube only, with instructions included. The holder, Helmholtz coils and power supply are separate items, and we can quote them together with the tube on request.
What gas is inside the Teltron Dual Beam Tube D?
The Teltron Dual Beam Tube D is semi-evacuated and filled with low-pressure helium. Electrons excite the helium atoms along their path, which makes the beams visible as fine luminescent lines during the experiment.
Why does the Teltron Dual Beam Tube D have two electron guns?
The Teltron Dual Beam Tube D uses its axial gun with a co-axial magnetic field to study impact excitation and particle collisions, and its tangential gun with a perpendicular field to find the electron charge-to-mass ratio from the beam pattern diameter.
What are the electrical ratings of the Teltron Dual Beam Tube D?
The Teltron Dual Beam Tube D has a maximum filament voltage of 7.5 V, a maximum anode voltage of 300 V DC and a maximum deflection voltage of 50 V DC. The anode current is approx. 30 mA at 200 V.
Who supplies the Teltron Dual Beam Tube D?
Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, supplies the Teltron Dual Beam Tube D. Teltron is a third-party brand; the company sources the tube for colleges, universities and schools in India and international markets.
What should a Teltron Dual Beam Tube D enquiry include?
For the Teltron Dual Beam Tube D, list the number of tubes and say whether you already own a D-series holder, Helmholtz coils and a suitable supply, or need them quoted. Send the details through the contact page or the enquiry cart.
Request a Quote
Request pricing for the Teltron Dual Beam Tube D through our contact page, or add the tube and any missing accessories to the enquiry cart.
Last updated: 24 September 2026
