Teltron Electron Deflection Tube D Manufacturer,Supplier and Exporter in India

Teltron Electron Deflection Tube D (Product Code: SLE/PHY/44) is a highly evacuated electron tube used to show how electric and magnetic fields deflect an electron beam and to determine the specific charge e/m in physics laboratories. Its fluorescent screen, approx. 90 x 60 mm, is inclined to the beam axis so the whole beam path is visible, and a built-in plate capacitor provides the electric deflection. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.

Specifications

What Is the Electron Deflection Tube Used For?

With the Teltron Electron Deflection Tube D, students watch the electron beam trace a visible path across the inclined screen, then bend it with the electric field between the capacitor plates and with the magnetic field of the Helmholtz coil pair D. Adjusting the electric field until it exactly cancels the magnetic deflection straightens the beam again, and from the two field values the electron velocity and e/m can be calculated. This field-cancellation method makes it a core specific charge electron experiment for undergraduate physics.

Plan the power arrangement with the tube: it needs a 6.3 V AC filament supply and a high-voltage source for the anode and capacitor, each rated up to 5000 V. Mount the tube securely, use shrouded leads for every high-voltage connection, and let the filament warm up before raising the anode voltage.

What to Specify When Ordering

• Whether you need the Helmholtz coil pair D for the magnetic deflection.
• Whether you need a tube holder and a high-voltage power supply, or already own them.
• Number of tubes, for example one for demonstration or several for student groups.

Supplier

ScienceLab is the trading name of Jain Scientific Equipments Private Limited, which supplies Teltron electron tubes together with matching holders, coils and power supplies from Ambala, Haryana, India. Teltron is a third-party brand; the company sources the tube and quotes it with the accessories your experiment needs.

For vendor registration, the supplying company is Jain Scientific Equipments Private Limited (GSTIN 06AAECJ8618A1ZT), and export orders are handled under Importer-Exporter Code AAECJ8618A (DGFT). See our company profile for more.

Related Physics Lab Equipment

A complete e/m deflection set-up with the Teltron Electron Deflection Tube D usually includes these items:

• Teltron Tube Holder D — stand for the Teltron D-series tubes and coils.
• Teltron Helmholtz Pair of Coils D — magnetic field for the deflection and e/m measurement.
• EHT Power Supply — adjustable 5 kV supply with an auxiliary output for cathode heaters.
• Digital Voltmeter/Ammeter With Shunts — meter for reading the coil current.
• Teltron Maltese Cross Tube D — another D-series tube for electron-optics demonstrations.

Find more in our Physics Lab Equipment category.

Frequently Asked Questions

What can be measured with the Teltron Electron Deflection Tube D?
The Teltron Electron Deflection Tube D is used to determine the specific charge e/m and the velocity of the electrons. The electric field of the built-in plate capacitor is adjusted until it cancels the magnetic deflection produced by the Helmholtz coil pair D.

What voltages does the Teltron Electron Deflection Tube D need?
The Teltron Electron Deflection Tube D uses a 6.3 V AC filament supply, a maximum anode voltage of 5000 V and a maximum capacitor voltage of 5000 V. The anode current is approx. 0.1 mA at 4000 V.

Are Helmholtz coils included with the Teltron Electron Deflection Tube D?
The magnetic deflection uses the Helmholtz coil pair D, which is listed as a separate product. The Teltron Electron Deflection Tube D comes with instructions; add the coils, a tube holder and a power supply to your enquiry if you need them.

How large is the Teltron Electron Deflection Tube D?
The Teltron Electron Deflection Tube D has a glass bulb of approx. 130 mm diameter, a total length of approx. 260 mm and a fluorescent screen of approx. 90 x 60 mm. Store it in padded packaging, away from knocks, when not in use.

Who supplies the Teltron Electron Deflection Tube D?
The Teltron Electron Deflection Tube D 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 institutions in India and international markets.

What should a Teltron Electron Deflection Tube D enquiry include?
For the Teltron Electron Deflection Tube D, state the number of tubes and whether you also need the Tube Holder D, Helmholtz Pair of Coils D and a high-voltage power supply. Send the list through our contact page or the enquiry cart.

Request a Quote

Ask for a Teltron Electron Deflection Tube D quotation on our contact page, or add the tube and its accessories to the enquiry cart.

Last updated: 24 September 2026