- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Teltron Dual Beam Tube S
Teltron Dual Beam Tube S (Product Code: SLE/PHY/53) is a Teltron S-series electron tube containing low-pressure helium and two electron guns, used to measure the electron charge-to-mass ratio from the diameter of a visible beam pattern in physics laboratories. Its anode runs at up to 300 V DC, with an anode current of approx. 30 mA at 200 V, and instructions are included. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Series | Teltron S series |
| Tube type | Semi-evacuated, low-pressure helium filling |
| Electron guns | One tangential, one axial |
| Max. anode voltage | 300 V DC |
| Anode current | Approx. 30 mA at 200 V (anode) |
| Max. filament voltage | 7.5 V |
| Max. deflection voltage | 50 V DC |
| Documentation | Instructions included |
| Product code | SLE/PHY/53 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the Dual Beam Tube S Used For?
For the e/m experiment, the tube sits between Helmholtz coils so the magnetic field is perpendicular to the tangential beam. Students set an accelerating voltage, adjust the coil current until the glowing beam closes into a circle, and read its diameter; with the field worked out from the coil current, e/m follows from the standard relation. Repeating at several voltage and current settings gives a dependable average for this EM ratio apparatus exercise.
The axial gun adds a second investigation: with a co-axial magnetic field, the fine luminescent beams show impact excitation of helium atoms and particle collisions, linking electron physics to kinetic gas theory. Two investigations from one tube help physics departments in India get more from a single S-series set-up.
What to Specify When Ordering
- Whether your lab already has the Teltron Tube Holder S and Teltron Helmholtz Pair of Coils S.
- A power source able to give up to 300 V DC on the anode, 7.5 V on the filament and 50 V DC for deflection.
- An ammeter to set the Helmholtz coil current.
Supplier
Jain Scientific Equipments Private Limited, known by its trading name ScienceLab, supplies the Teltron Dual Beam Tube S from Ambala, Haryana, India. Teltron is a third-party brand; the company sources the tube for teaching laboratories and can bundle it with S-series holders and coils in a single quotation.
Buyers who need registration details can use GSTIN 06AAECJ8618A1ZT, and international orders are shipped under the company's Importer-Exporter Code AAECJ8618A issued by the DGFT. Visit our profile page for more.
Related Physics Lab Equipment
Complete an e/m practical with the Teltron Dual Beam Tube S using these items:
- Teltron Tube Holder S — stand for the S-series tube and its coils.
- Teltron Helmholtz Pair of Coils S — the perpendicular field that bends the beam into a circle.
- High Tension Power Supply — supply designed for thermionic experiments with Teltron fine beam tubes.
- Digital Voltmeter/Ammeter With Shunts — reads the coil current for the field calculation.
- Teltron Dual Beam Tube D — the D-series version of this tube.
More options are in Physics Lab Equipment.
Frequently Asked Questions
How is e/m found with the Teltron Dual Beam Tube S?
With the Teltron Dual Beam Tube S, the tangential beam is bent into a circle by a perpendicular magnetic field. Measuring the circle's diameter, the accelerating voltage and the field strength lets students calculate the electron charge-to-mass ratio.
Why is the beam visible in the Teltron Dual Beam Tube S?
The Teltron Dual Beam Tube S is semi-evacuated and filled with low-pressure helium. Electrons excite the helium atoms along their path, producing fine luminescent beams that make the trajectory visible to the whole group.
What voltages does the Teltron Dual Beam Tube S use?
The Teltron Dual Beam Tube S has a maximum anode voltage of 300 V DC, a maximum filament voltage of 7.5 V and a maximum deflection voltage of 50 V DC, with an anode current of approx. 30 mA at 200 V.
Are instructions provided with the Teltron Dual Beam Tube S?
Yes, instructions are included with the Teltron Dual Beam Tube S. Keep them with the tube, and check the voltage limits in them before connecting a new or different power supply.
Who supplies the Teltron Dual Beam Tube S?
The Teltron Dual Beam Tube S is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India. Teltron is a third-party brand; the company sources the tube for schools, colleges and universities in India and international markets.
What should a Teltron Dual Beam Tube S quotation request include?
For the Teltron Dual Beam Tube S, give the number of tubes, say which S-series holder, coils and supply you already own, and name the delivery destination. Send the request through our contact page or the enquiry cart.
Request a Quote
Get a Teltron Dual Beam Tube S quotation by writing to us on the contact page, or add the tube and matching S-series items to the enquiry cart.
Last updated: 24 September 2026
