Quick answer. Treat this as a general accessories listing rather than a range: the key decision is which items to buy here and which to buy from the subject ranges. Roughly 250 items, coded PL-0001 upwards, mix resistance apparatus, magnets, power supplies, ray boxes, trolleys and even chemistry and biology consumables, and most of those subjects have a fuller range elsewhere on this site. Buy here for what appears only here - the neodymium magnets, the four bench power supplies, the post office box, the colorimeter and the rain gauge - and treat the neodymium magnets as a separate, safety-led purchase.
This listing holds roughly two hundred and fifty items, coded PL-0001 upwards across twenty-five pages, and it does not have a single subject. It carries resistance bridges and potentiometers, magnets of every material including neodymium, four kinds of bench power supply, ray boxes, trolleys and pulleys, a colorimeter, a rain gauge, and a number of chemistry and biology consumables. Read it as a general accessories listing rather than as a range: the table below says which part of this site normally carries each subject, and the sections after it cover the items for which this is the only listing. If you are buying neodymium magnets from here, read that section before you order , they are not the same purchase as the other magnets on this site.
| Subject in this listing | The fuller range on this site |
|---|---|
| Resistance boxes, post office box, meter bridge, potentiometer, pencil jockey | Electricity for decade boxes and components, Electricity and Cell Lab for meters and galvanometers |
| Magnets: horseshoe, U-shaped, ferrite, Magnadur, floating ring | Magnetism Physics Equipments , except the neodymium codes, which appear only here |
| Ray boxes, colour filters, colorimeter | Optics Physics Lab |
| Trolleys, pulleys, force meters, Newton's cradle | Mechanics Physics Lab |
| Ebonite rods, electroscope, electrostatics sets | Electrostatic Physics Labware |
| U-tube manometer, rain gauge | Fluid Mechanics Physics Equipments |
| Conductivity rods, Daniell cell, dynamo model, diode, semiconductor sets | Electricity and Heat and Engine Physics Lab Equipments |
| Deflagrating spoon, porcelain boat, porous pot, dissecting needles | Chemistry and biology consumables rather than physics apparatus; ask where they properly sit |
| Only here | Neodymium magnets, the four bench power supplies, the post office box, the colorimeter and the rain gauge |
Three codes here are neodymium: discs, cylinders and a block. Neodymium magnets are many times stronger than the ferrite and Alnico magnets elsewhere on this site, and that difference in degree is a difference in kind. Four things follow, and the first is the one that matters most in a school.
Four codes cover supplies and they are genuinely different products: a direct-current battery eliminator, a step-type supply without a meter, the same with an analogue meter, and the same with a digital meter. For a teaching laboratory the meter is usually worth the difference, because a student who can see the voltage learns more than one who sets a knob. Ask for:
The post office box, meter bridge, potentiometer and pencil jockey at the head of this listing are the classical resistance-measurement apparatus, and they are bought as a working set rather than individually. For each, ask what else the experiment needs, because most of it is not in the box: a galvanometer, which is the detector in every one of these experiments and is a separate purchase under Electricity and Cell Lab; a cell or low-voltage supply; a set of leads; and for the potentiometer a standard cell or reference voltage if the experiment calls for one.
On the apparatus itself ask the bridge wire material and its uniformity, since the whole method assumes resistance per unit length is constant along the wire; the scale division; whether the wire is replaceable and what a replacement costs, because a kinked or corroded bridge wire is the usual reason a meter bridge gives inconsistent results; and for the potentiometer, whether it is the single-wire or the ten-wire pattern, which decides the resolution. For the resistance boxes, ask the range, the per-step tolerance and the power rating, and note that the decade boxes in Electricity cover the same ground, so compare before ordering both.
For the digital colorimeter, ask which wavelengths or filters are supplied, the cuvette type and path length and whether cuvettes are included, the measurement range in absorbance, and what the standards for calibration are and whether they come with it. A colorimeter without cuvettes and without a calibration standard cannot produce a usable reading. For the rain gauge, ask the collecting area and the measuring cylinder graduation, since the reading depends on the ratio of the two, and whether a mounting arrangement is included.
Order by code and check the code carefully, because this listing has a specific problem: one code appears twice in it under two different product names, as an electroscope on the first page and as an electrostatics apparatus set on the last, so that code alone does not identify what will be shipped. A block of items at the end of the listing also uses a code format found nowhere else on the site, containing a slash, which will not sort or look up with the rest of the catalogue. Two names are misspelled, porcelain as "porcelein" and porous as "porus", and the Daniell cell is spelled with one letter l. Ask also for dimensions and materials, the manual where there is an experiment to perform, the quantity per student group, consumables with quantity prices, the supply voltage, frequency and plug type for your country for the power supplies and the colorimeter, and the warranty. Any figure quoted is confirmed in writing on the quotation; ask for its basis.
For a whole laboratory rather than individual accessories, start from the subject ranges: Mechanics Physics Lab, Heat and Engine Physics Lab Equipments, Optics Physics Lab, Physics Sound and Waves Lab, Electricity, Magnetism Physics Equipments and Electrostatic Physics Labware. Parent range: Physics Lab Equipments.
Quote the codes you want and ask for a specification against each, since the names in this listing are not enough to order from. For example a step-type power supply with a digital meter, eight benches, with the voltage steps, the current rating and the overload protection stated; a meter bridge with a spare bridge wire and a galvanometer specified separately; and if you need neodymium magnets, the grade, pull, dimensions, coating and maximum temperature in writing. Contact Ray Export for specifications, prices and lead times.
Only with controls. They are many times stronger than the ferrite and Alnico magnets elsewhere on this site. If two or more small magnets are swallowed, they attract through the wall of the gut and can perforate it - a known cause of serious injury requiring surgery. So they have no place in a primary classroom or anywhere unsupervised: count them out and back in, and look for a missing one rather than writing it off. Two that jump together can break skin and crack, sending shards, so use a spacer, slide them apart and specify eye protection. If pupils are to handle magnets, buy ferrite.
Three codes here are neodymium - discs, cylinders and a block - and they appear only on this listing. Ask the grade, pull figure and dimensions; the temperature above which the magnet permanently loses strength, which is lower than people expect; and the coating, because an uncoated or chipped neodymium magnet corrodes. Ask how they are packed for transport, since a loose pile of strong magnets is a shipping problem in its own right. And plan storage well away from pacemakers, watches, cards, phones and hard drives, and from the compasses and dip circles of the magnetism range.
They are genuinely different: a direct-current battery eliminator, a step-type supply without a meter, the same with an analogue meter, and the same with a digital meter. For teaching, the meter is usually worth having, because a student who can see the voltage learns more than one who sets a knob. Then compare the voltage range and step size - a step supply cannot do a fine sweep - the current rating at the top and bottom of the range, regulation and ripple, short-circuit and overload protection and how it resets, AC as well as DC output, mains isolation and terminal type.
The post office box, meter bridge, potentiometer and pencil jockey are bought as a working set, and most of what the experiment needs is not in the box: a galvanometer, which is the detector in every one of these experiments and a separate purchase under Electricity and Cell Lab; a cell or low-voltage supply; leads; and for the potentiometer a standard cell or reference voltage where the experiment calls for one. On the apparatus, ask the bridge wire material and uniformity, the scale division, whether the wire is replaceable, and whether the potentiometer is single-wire or ten-wire, which decides resolution.
A colorimeter without cuvettes and without a calibration standard cannot produce a usable reading, so for the digital colorimeter ask which wavelengths or filters are supplied, the cuvette type and path length and whether cuvettes are included, the measurement range in absorbance, and what the calibration standards are and whether they come with it. Confirm the supply voltage, frequency and plug type for your country too. For the rain gauge, ask the collecting area and the measuring cylinder graduation, since the reading depends on the ratio of the two, and whether a mounting arrangement is included.
Order by code and product name together, and check both. One code appears twice in this listing under two different names - as an electroscope on the first page and as an electrostatics apparatus set on the last - so that code alone does not identify what will be shipped. A block of items at the end uses a code format containing a slash, found nowhere else on the site. Two names are misspelled, porcelain as porcelein and porous as porus, and the Daniell cell is spelled with one l. Ask for a specification against each code on the quotation.
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 - magnet grade, pull, coating and maximum temperature, supply voltage ranges and current ratings, bridge wire material, colorimeter wavelengths and cuvettes - are confirmed in writing on the quotation. For certificates, standards or approvals, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing notes: one code is used twice, for an electroscope on the first page and an electrostatics apparatus set on the last; a block of items at the end uses a code format containing a slash; porcelain is misspelled porcelein, porous is misspelled porus and Daniell cell is spelled with one l; and chemistry and biology consumables such as a deflagrating spoon, porcelain boat and dissecting needles are filed in this physics listing.
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