MAGNETISM PHYSICS EQUIPMENTS LABWARE Lab Equipment Manufacturer, Supplier and Exporter in India

Thirty-three items are listed here, MP-0001 to MP-0033, and they divide almost evenly into two subjects. Fourteen are permanent magnets and compasses for the magnetism syllabus. The rest is electromagnetism: a Barlow wheel, an electric bell, transformers, dissectible coils, an electromagnet, a motor kit and a current-balance. Two things decide a magnet order and neither appears in any product name: the magnet material, which sets how strong it is and how easily it is ruined, and the dimensions. Ask for both against every code.

The range, by subject

Magnet material: the specification that decides everything

Three materials appear in this listing and they behave quite differently in a school store:

• Alnico gives a strong field and the classic bar-magnet shape, but it is comparatively easy to demagnetise. A blow, heat, or storage with like poles facing will weaken it, and a weak bar magnet is the commonest reason a field-plotting practical gives a muddle instead of a pattern.
• Ceramic, also sold as ferrite, holds its magnetism far better and is the sensible choice for equipment handled by a whole class. It is weaker for the same size and it is brittle: two ceramic magnets allowed to snap together chip, and the chips travel.
• Magnadur is a ferrite slab magnetised through its thickness, made for the Westminster and Worcester pattern kits, so if you own kits of that type ask that the slabs match them.

Then ask, for every magnet code: the dimensions; the material; whether the poles are marked and how durably, since painted markings wear off and an unmarked magnet is useless for plotting; and whether keepers are supplied with the bar magnets. Keepers matter: bar magnets are stored in pairs with unlike poles together and soft-iron keepers across the ends, and a set stored loose in a drawer will have lost much of its strength by the following year. That one habit does more for a school's magnetism practicals than any purchase on this page.

Handling magnets, and what to keep them away from

Nothing here is dangerous in the way a mains trainer is, but four points belong in the laboratory rules. Strong magnets snap together hard enough to pinch fingers and to chip, and ceramic chips fly, so they are brought together deliberately and slowly rather than allowed to jump. They are kept away from cardiac pacemakers and other implanted electronic devices, so ask the class before passing magnets round the room. They are kept away from mechanical watches, bank cards, phones and anything with a magnetic stripe or a hard disc. And they are not dropped, hammered or heated, all of which cost field strength permanently. For the suspension magnet (MP-0012), ask what it is suspended by and whether spare thread or fibre is supplied, since that is what breaks.

Compasses, magnetometers and the dip circle

Five compass codes overlap here, so ask what distinguishes them and buy the ones your practicals need: plotting compasses are small, numerous and used in sets to trace a field line, while a mariner's or demonstration compass is one per class. Ask the diameter, whether the needle is jewelled or pivoted, and how freely it settles, since a sticky compass is worse than none for field plotting. Ask how many plotting compasses come in a set.

For the deflection magnetometer (MP-0023, MP-0024) and the dip circle and needle (MP-0027, MP-0028), ask the scale division, whether the instrument levels, and whether the magnetometer comes with the magnets the experiment needs. One practical point that is not in any manual: all four of these measure the Earth's field and all four are defeated by the laboratory itself. A steel bench frame, a radiator, reinforced concrete, a steel cupboard or a mains cable under the floor will deflect the reading, and so will a magnet left out on the next bench. Site these experiments away from steel and well away from where the magnets are being used, and have students check that the reading returns to the same value when the apparatus is moved.

The demountable transformer needs a specific warning

A demountable transformer (MP-0026) and a dissectible coil set (MP-0029) let students build a transformer from a core and separate coils, which is excellent teaching and the one item on this page that can produce a genuinely dangerous voltage. With a low-turn coil as primary and a high-turn coil as secondary, the output can be several times the input, so a set run from the mains can present a lethal voltage on exposed secondary terminals. The rule is that the primary is fed from a low-voltage supply, never directly from the mains, and that is what you should specify when ordering.

Ask the supplier: what supply the set is designed for; the turns on each coil supplied; whether the terminals are shrouded; whether there is any overload protection; and what happens to the low-turn coil if its output is short-circuited, because a few-turn secondary across a core can pass a very large current and get hot enough to burn. Ask also whether a core clamp is included, since a core that is not clamped buzzes loudly and can be thrown apart by the magnetic forces.

Also worth confirming

Quote the code rather than the name, and note three specific faults in this listing before you order from it. The code MP-0007 is used twice, for two different products, a cylindrical magnet and a horseshoe magnet, so that code alone cannot identify what you want; MP-0009 is absent from the sequence. The Worcester kit is spelled Worchester, and the lodestone is written as two words, so neither will match a search for the correct term. Apostrophes appear as a bare space in both mariner's compass entries. Several magnet shapes are listed two or three times with no stated difference, and nine or ten items in this category are electromagnetism rather than magnetism. Ask also for the manual with the expected result, the quantity per student group, keepers and spare suspension thread, the supply voltage, frequency and plug type for your country for the bell, motor kit and transformers, and the warranty. Any field strength or dimension quoted is confirmed in writing on the quotation; ask for its basis.

Related ranges on this site

Supplies, meters, cells and circuit components for the electromagnetism half of this listing are under Electricity and Cell Lab and Electricity. Charge, electroscopes and the Van de Graaff generator are under Electrostatic Physics Labware. Force and balance apparatus is under Mechanics Physics Lab, and the induction-coil and discharge-tube work under Optics Physics Lab. Parent range: Physics Lab Equipments.

Request a quote

Ask for magnets by material and dimension, not by name. For example ceramic bar magnets (MP-0006) with keepers, eight pairs, with the dimensions and pole marking stated; a set of plotting compasses (MP-0022) with the number per set confirmed; and a demountable transformer (MP-0026) with the coil turns listed and the low-voltage supply requirement stated in writing. Contact Ray Export for prices, dimensions and lead times.

Frequently asked questions

Should we buy Alnico, ceramic or Magnadur magnets?

Alnico (for example the Alnico bar magnet MP-0001) gives a strong field and the classic bar shape but is comparatively easy to demagnetise; a blow, heat or storage with like poles facing weakens it, and a weak bar magnet is the commonest reason a field-plotting practical produces a muddle. Ceramic, also sold as ferrite (MP-0006), holds its magnetism far better and suits class use, but is weaker for the same size and brittle. Magnadur (MP-0008) is a ferrite slab magnetised through its thickness for Westminster and Worcester pattern kits, so match it to kits you own.

What should we ask for against every magnet code?

The dimensions and the material, since neither appears in any name. Whether the poles are marked and how durably, because painted markings wear off and an unmarked magnet is useless for plotting. And whether keepers are supplied with the bar magnets. Keepers matter more than any purchase here: bar magnets are stored in pairs with unlike poles together and soft-iron keepers across the ends, and a set stored loose in a drawer will have lost much of its strength by the following year. Several shapes are listed two or three times without stated difference, so ask what distinguishes them.

Which of the five compass codes do we need?

MP-0018 to MP-0022 overlap, so ask what distinguishes them and buy the ones your practicals need. Plotting compasses are small, numerous and used in sets to trace a field line; a mariner's or demonstration compass is one per class. Ask the diameter, whether the needle is jewelled or pivoted, and how freely it settles, because a sticky compass is worse than none for field plotting. For a plotting set such as MP-0022, ask how many compasses come in the set so you can plan one set per student group.

Why do magnetometer and dip circle readings go wrong?

The deflection magnetometers MP-0023 and MP-0024 and the dip circle and dip needle MP-0027 and MP-0028 all measure the Earth's field, and the laboratory itself defeats them. A steel bench frame, radiator, reinforced concrete, steel cupboard or mains cable under the floor deflects the reading, and so does a magnet left on the next bench. Site these experiments away from steel and from where magnets are in use, and have students check the reading returns to the same value when the apparatus is moved. Ask also the scale division, whether the instrument levels, and whether magnets are included.

Is the demountable transformer MP-0026 safe for students?

It is excellent teaching and the one item on this page that can produce a genuinely dangerous voltage. With a low-turn primary and a high-turn secondary the output can be several times the input, so a set run from the mains can present a lethal voltage on exposed terminals. Specify that the primary is fed from a low-voltage supply, never directly from the mains. Ask the supply the set (and the dissectible coils MP-0029) is designed for, the turns on each coil, whether terminals are shrouded, overload protection, what happens if a few-turn coil is short-circuited, and whether a core clamp is included.

What handling rules should go with these magnets?

Strong magnets snap together hard enough to pinch fingers and chip, and ceramic chips fly, so bring them together deliberately and slowly. Keep them away from cardiac pacemakers and other implanted electronic devices, and ask the class before passing magnets round. Keep them away from mechanical watches, bank cards, phones and anything with a magnetic stripe or hard disc. Do not drop, hammer or heat them, since all three cost field strength permanently. For the suspension magnet MP-0012, ask what it hangs by and whether spare thread or fibre is supplied, since that is what breaks.

Key takeaways

• Material and dimensions first: neither appears in any magnet name, so ask for both against every code.
• Ceramic for class use: it resists demagnetising better than Alnico, though it is weaker and brittle.
• Keepers preserve strength: store bar magnets in pairs, unlike poles together, with keepers across the ends.
• Steel spoils Earth-field readings: site magnetometers and dip circles away from steel and from magnets in use.
• Low-voltage primaries only: never feed the demountable transformer MP-0026 directly from the mains.
• Quote name and code together: MP-0007 is used for two different products.

About this page

Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.

Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.

Specifications for MP-0001 to MP-0033, including magnet material and dimensions, pole marking, compass diameter, coil turns and supply voltage, are confirmed in writing on the quotation. For certificates, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing notes: MP-0007 is used for both a cylindrical and a horseshoe magnet; MP-0009 is absent; the Worcester kit is spelled Worchester and lodestone is written as two words; apostrophes appear as a bare space in the mariner's compass entries; several magnet shapes are listed more than once without stated difference; and about ten items are electromagnetism rather than magnetism.