Other Engineering Lab Trainers Lab Equipment Manufacturer, Supplier and Exporter in India

Thirty-two items are listed here, OELT-0001 to OELT-0032, and they do not share a subject. The listing holds rotating machines and transformers, undergraduate physics apparatus, analytical instruments for water and soil, bridges, a radiation counting setup, a microwave bench and two microprocessor kits. Read it as a catch-all rather than a range: if you know what you want, the table below says which part of this site normally carries it, and the sections after that cover the items for which this is the only listing.

What is here, and where the same subject sits elsewhere

OELT-0028, radiation counting setup: settle the source before anything else

A Geiger-Muller counting experiment needs a radioactive check source, and a radioactive source is not an ordinary accessory. Sources are separately regulated in almost every country, their import, possession and disposal require authorisation from the national radiation regulator, and they generally cannot simply be shipped with laboratory apparatus. Before ordering:

• Ask in writing whether any radioactive source is supplied with the apparatus, and if so which nuclide and what activity. If the answer is yes, do not proceed until your own regulator has confirmed what authorisation you need, and the supplier has confirmed what export authorisation applies at their end.
• If no source is supplied, which is the usual case, plan to obtain one through an authorised supplier in your own country under your institution's licence, and ask what source type and activity the experiment assumes so the apparatus and the source match.
• Ask what your institution must already have in place: a radiation protection adviser or equivalent, a registered store, a source inventory, dose monitoring if required, and a disposal route. These are prerequisites, not paperwork to arrange afterwards.
• On the apparatus itself, ask the detector type and window, the operating voltage range so the plateau can be found, the dead-time, whether the counter and timer are integral, and whether absorber sets and a source holder with distance adjustment are included, since inverse-square and absorption experiments need them.

This page makes no statement about what Ray Export does or does not supply with this item; ask, and get the answer in writing before raising a purchase order.

OELT-0001, flame photometer: the gas supply is part of the purchase

A flame photometer burns a fuel gas, so buying one commits you to a gas supply and its controls. Ask which fuel the instrument uses and at what pressure, whether air is supplied by an integral compressor or must come from a separate one, and what the consumption is. Then plan the facility: cylinder storage and restraint, ventilation and an extraction hood over the instrument, leak testing of the gas line, a flame arrestor where the supplier specifies one, and a shut-off valve the operator can reach. Ask also which elements the instrument determines and which filters are supplied, whether the standards needed for calibration are included and what they cost to replace, and the detection range and repeatability. Calibration standards are a recurring cost that quotations rarely show.

Water and soil instruments: ask about the standards, not the instrument

For the turbidity meter (OELT-0013), the dissolved-solids meter (OELT-0014) and the water and soil analysis kit (OELT-0005), the instrument is the smaller part of the decision. Ask which calibration standards are supplied and how often they must be replaced; what the measurement range and resolution are; whether readings are temperature compensated, which matters a great deal for conductivity-based dissolved-solids measurement; what the electrode or cell life is and what a replacement costs; and for the analysis kit, exactly which determinations it performs, which reagents it uses, the shelf life of those reagents, and how many tests a kit yields. Ask for safety data sheets for every reagent before ordering, and check that each one can be imported into your country.

The physics apparatus and the two bridges

• OELT-0002 and OELT-0016, charge-to-mass ratio by the short solenoid and magnetron methods. These two carry the same name, with the second distinguished only by a trailing digit, so ask what the difference is. On the apparatus, ask the accelerating voltage range and how it is measured, the solenoid current range and the field calibration, and what guarding is provided, since this experiment involves a vacuum tube at a few hundred volts.
• OELT-0007, semiconductor band gap. Ask how the diode is heated and how its temperature is measured, since the result is the slope of a log current against inverse temperature plot and the temperature measurement dominates the error; and whether the oven, thermometer and current source are included.
• OELT-0022, ultrasonic interferometer for liquids. Ask the operating frequency, the cell volume, whether the cell is thermostatted and how the temperature is read, since sound velocity in a liquid varies with it; and which liquids the supplied cell tolerates.
• OELT-0024, dielectric constant apparatus. Ask at what frequency it measures and which specimen forms it accepts, solid, liquid or both.
• OELT-0006 and OELT-0023, the two bridges. One is a capacitance comparison bridge and the other a precision resistance bridge of the dial type, usually used for platinum resistance thermometry. Ask the range, the resolution of the dials, the accuracy, and whether a calibration certificate is supplied, because a bridge is only useful as a reference if its own values are known.

OELT-0029 microwave bench and OELT-0015 sodium lamp supply

For the microwave test bench, ask the frequency band, the source type and output power, which components are supplied, for example isolator, attenuator, slotted line, detector mount and horn, and whether a standing wave ratio meter and power supply are included. Two safety points: nobody looks into an open waveguide or a horn aperture while the source is energised, and you should confirm with your national spectrum authority that transmitting on the band in a teaching laboratory requires no licence or that an exemption applies.

For OELT-0015, confirm whether the lamp itself is supplied or only the transformer, and the lamp rating the transformer suits. A sodium vapour lamp runs very hot and needs time to cool before handling, and a broken lamp should be handled with care and disposed of properly rather than swept up loose.

Also worth confirming

Because this listing mixes subjects, quote the code and never the name alone: several names here are near-duplicates, one is a category name rather than a product, and some carry a trailing digit whose meaning is not stated. Ask for the manual with expected results for every item, the quantity per student group, consumables and their prices, the supply voltage, frequency and plug type for your country, and the warranty. Any performance figure quoted is confirmed in writing on the quotation; ask for its basis.

Related ranges on this site

Machines and transformers with their test experiments are under Electrical Engineering Trainers; converter circuits under Power Electronics Trainers; transducers, control and programmable logic controllers under Instrumentation Trainers and Power and Instrumentation Lab. Electronics foundations are under Basic Electronics Trainers and Digital and Analog Trainers and Kits, processors under Microprocessor Trainers and Kits, microwave and antennas under Communication and RF Trainers, and instruments under Testing and Measuring Lab Trainers. Parent range: Electronics Lab Trainer Kits.

Request a quote

List the codes you want and ask for a specification against each, since the names in this listing are not enough to order from. For the counting setup, ask the source position in writing before anything else. Contact Ray Export for prices, manuals and lead times.

Frequently asked questions

Is a radioactive source supplied with the radiation counting setup OELT-0028?

This page makes no statement either way, so ask in writing whether any source is supplied, and if so which nuclide and what activity, before raising a purchase order. Sources are separately regulated in almost every country: import, possession and disposal need authorisation from the national radiation regulator, and they generally cannot simply be shipped with laboratory apparatus. If no source is supplied, which is the usual case, obtain one through an authorised supplier in your own country under your institution's licence, and ask what source type and activity the experiment assumes so that apparatus and source match.

What must be in place before running Geiger-Muller counting experiments?

The prerequisites come before the purchase, not after it: a radiation protection adviser or equivalent, a registered store, a source inventory, dose monitoring where required, and a disposal route. On the apparatus itself, ask the detector type and window, the operating voltage range so that the plateau can be found, the dead-time, whether the counter and timer are integral, and whether absorber sets and a source holder with distance adjustment are included, because inverse-square and absorption experiments need them. Ask for all of this to be confirmed in writing on the quotation.

What does the flame photometer OELT-0001 need besides the instrument?

A gas supply and the facility around it. A flame photometer burns a fuel gas, so ask which fuel and at what pressure, whether air comes from an integral compressor or a separate one, and the consumption. Then plan cylinder storage and restraint, ventilation and an extraction hood over the instrument, leak testing of the gas line, a flame arrestor where one is specified, and a shut-off valve the operator can reach. Ask too which elements it determines, which filters are supplied, whether calibration standards are included, and the detection range and repeatability - standards are a recurring cost that quotations rarely show.

What should I ask about the turbidity, dissolved-solids and water and soil instruments?

For the turbidity meter (OELT-0013), the dissolved-solids meter (OELT-0014) and the water and soil analysis kit (OELT-0005), the instrument is the smaller part of the decision. Ask which calibration standards are supplied and how often they must be replaced, the measurement range and resolution, whether readings are temperature compensated - which matters a great deal for conductivity-based dissolved-solids measurement - and the electrode or cell life. For the kit, ask exactly which determinations it performs, which reagents it uses and their shelf life, how many tests it yields, and for safety data sheets so you can check each reagent can be imported.

What is the difference between OELT-0002 and OELT-0016?

Both are charge-to-mass ratio apparatus, by the short solenoid and magnetron methods, and they carry the same name with the second distinguished only by a trailing digit - so ask what the difference is before ordering. For either, ask the accelerating voltage range and how it is measured, the solenoid current range and the field calibration, and what guarding is provided, because the experiment involves a vacuum tube at a few hundred volts. The same caution applies across this listing: several names are near-duplicates, so quote the code and ask for a specification against it.

What should I check on the two bridges and the microwave bench?

OELT-0006 and OELT-0023 are a capacitance comparison bridge and a precision dial-type resistance bridge, usually used for platinum resistance thermometry. Ask the range, dial resolution and accuracy, and whether a calibration certificate is supplied, because a bridge is only useful as a reference if its own values are known. For the microwave bench, OELT-0029, ask the frequency band, source type and output power, which components are supplied - isolator, attenuator, slotted line, detector mount, horn - and whether a standing wave ratio meter and power supply are included. Nobody should look into an open waveguide or horn while the source is energised.

Key takeaways

• This is a catch-all, not a range - machines, electronics and microprocessor items have dedicated listings with their experiments.
• Settle the source position first for OELT-0028 - radioactive sources need regulator authorisation and rarely ship with apparatus.
• A flame photometer commits you to a gas supply - cylinder storage, extraction, leak testing and a reachable shut-off valve.
• Standards and reagents are the ongoing commitment for the water, soil and flame instruments - ask replacement intervals and shelf life.
• Temperature measurement dominates the error in the band gap (OELT-0007) and ultrasonic interferometer (OELT-0022) experiments - ask how it is controlled and read.
• Quote the code, never the name alone - OELT-0019 names only a category and several other names are near-duplicates.

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 - ranges, resolution, voltages, frequency bands, components and accessories supplied - are confirmed in writing on the quotation, and for the counting setup the source position should be confirmed in writing before any order. For calibration records, standards or approvals, contact us for the latest copies of the relevant certificates. Before using the microwave bench, confirm with your national spectrum authority whether a licence or exemption applies. No price is quoted on this page. Listing notes: this listing mixes unrelated subjects that also appear in dedicated ranges; OELT-0019 is named only as a category (Electrical Engineering Equipments) and identifies no product; OELT-0002 and OELT-0016 share a name distinguished only by a trailing digit; and several other names are near-duplicates or carry a trailing digit whose meaning is not stated.