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Teltron Helmholtz Pair of Coils S
Teltron Helmholtz Pair of Coils S (Product Code: SLE/PHY/48) is a pair of coils used to generate a uniform magnetic field perpendicular to the axis of a Teltron S-series electron tube in physics laboratories. Each coil has 320 turns on a 138 mm diameter and carries 1.0 A continuously, giving a maximum field of approx. 9 mT for bending electron beams in e/m experiments. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail (each coil) |
|---|---|
| Number of turns | 320 |
| Coil diameter | 138 mm |
| Terminals | 4 mm safety sockets |
| Load rating | 1.0 A continuous operation; 1.5 A short-term operation |
| Effective impedance | Approx. 6.5 ohm |
| Max. field strength | Approx. 9 mT |
| Field direction | Perpendicular to the tube axis; vertical or coaxial arrangements possible with the Teltron Tube Holder S |
| Supplied as | Pair of coils, with instructions |
| Product code | SLE/PHY/48 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Are Helmholtz Coils Used For?
Mounted on the Teltron Tube Holder S, the two coils sit either side of the tube so that a current through them bends the electron beam into an arc or circle. From the coil current, number of turns and diameter, students calculate the field strength and combine it with the accelerating voltage and beam radius to find the specific charge of the electron — the heart of any EM ratio apparatus set-up in Indian physics laboratories.
The holder also lets the coils be set at variable distances, or arranged to give a vertical or coaxial field relative to the tube axis, so the same pair serves experiments that need a different field direction. Keep the current at or below 1.0 A for long runs and use the 1.5 A rating only briefly; an ammeter in series makes it easy to stay within these limits.
What to Specify When Ordering
- Whether you need the Teltron Tube Holder S on which the coils are configured.
- A DC supply and ammeter for the coil current, suited to 1.0 A continuous operation.
- Which S-series tubes you will use with the coils.
Supplier
Jain Scientific Equipments Private Limited, trading as ScienceLab, supplies the Teltron Helmholtz Pair of Coils S from Ambala, Haryana, India, as part of its electron-beam experiment range. Teltron is a third-party brand; the company sources the coils and can quote them with the holder, tubes and meters that complete the set-up. Visit our profile page to learn more.
Related Physics Lab Equipment
Use the Teltron Helmholtz Pair of Coils S with these items:
- Teltron Tube Holder S — sets the coil spacing and orientation around the tube.
- Digital Voltmeter/Ammeter With Shunts — meter for monitoring the coil current.
- Teltron Dual Beam Tube S — e/m from the diameter of a circular beam.
- Teltron Thomson Tube S — e/m by balancing electric and magnetic fields.
- Teltron Helmholtz Pair of Coils D — the equivalent coil pair for D-series tubes.
More items are listed under Physics Lab Equipment.
Frequently Asked Questions
What magnetic field do the Teltron Helmholtz Pair of Coils S produce?
Each coil of the Teltron Helmholtz Pair of Coils S has 320 turns and a 138 mm diameter, and the maximum field strength is approx. 9 mT. Set in Helmholtz geometry, the pair gives a uniform field across the tube.
What current can the Teltron Helmholtz Pair of Coils S carry?
The Teltron Helmholtz Pair of Coils S are rated at 1.0 A for continuous operation and 1.5 A for short-term operation, with an effective impedance of approx. 6.5 ohm per coil. A series ammeter helps keep the current within these limits.
How are the Teltron Helmholtz Pair of Coils S connected?
The Teltron Helmholtz Pair of Coils S connect through 4 mm safety sockets. Wire the two coils so the current flows the same way round in each; otherwise their fields oppose and the electron beam will not curve as expected.
Do the Teltron Helmholtz Pair of Coils S need the Tube Holder S?
Yes. The Teltron Tube Holder S lets the Teltron Helmholtz Pair of Coils S be configured in Helmholtz geometry or at variable distances, with the field vertical or coaxial to the tube axis. Order the holder too if your lab does not have one.
Who supplies the Teltron Helmholtz Pair of Coils S?
The Teltron Helmholtz Pair of Coils S are supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India. Teltron is a third-party brand, and the company sources the coils for institutions in India and international markets.
What should an enquiry for the Teltron Helmholtz Pair of Coils S include?
For the Teltron Helmholtz Pair of Coils S, give the number of pairs, the S-series tubes they will serve, and whether you need the Tube Holder S, a DC supply or a meter. Send it via our contact page or the enquiry cart.
Request a Quote
Ask for a quotation for the Teltron Helmholtz Pair of Coils S through the contact page, or collect the coils and matching S-series items in the enquiry cart.
Last updated: 24 September 2026
