Millikan's Oil Drop Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-EMA-1067
Jlab Export is a leading Millikan's Oil Drop Apparatus Manufacturer,and suppliers in India
Millikan’s Oil Drop Apparatus (code EL-EMA-1067) lets students repeat the oil drop experiment by which Robert A. Millikan measured the charge on the electron. A specially designed condenser, a light source and a measuring microscope with micrometer scale are mounted on one support — a heavy cast iron base with a steel pillar. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Experiment | Measuring the charge on the electron by Millikan’s oil drop method |
| Principal elements | Specially designed condenser, light source and measuring microscope, all mounted on a common support |
| Support | Heavy cast iron base with a steel pillar carrying the microscope and the lamp house |
| Microscope adjustment | Slow-motion screws for smooth horizontal and vertical movement |
| Microscope scale | Micrometer scale provided |
| Atomizer | Fitted on the same carriage |
| Setting up | No critical adjustment needed; oil drops appear in the microscope within seconds (as listed) |
| Quality check | Each apparatus is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-EMA-1067 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is Millikan’s Oil Drop Apparatus Used For?
It is used to show that electric charge comes in whole-number multiples of one smallest unit, and to measure that unit. Fine oil drops from the atomizer pick up small charges as they are sprayed and drift into the space between the condenser plates, where the light source makes them show as bright points in the microscope. With no voltage on the plates, a drop falls at a steady speed that students time against the micrometer scale; Stokes’ law then gives the drop’s radius and weight. A voltage across the plates can hold the drop still or drive it upwards, and the electric force needed gives the charge it carries. Repeated over many drops, the charges group around multiples of the electronic charge.
The experiment is a set practical in B.Sc. and engineering physics labs and a memorable demonstration when senior secondary classes meet the quantisation of charge. Because the microscope moves on slow-motion screws and the atomizer rides on the same carriage, a class can find and follow drops without long alignment work. Keep the condenser plates clean and dry, use only a small puff from the atomizer so the field of view does not crowd with drops, and switch off the plate voltage before cleaning or adjusting the condenser.
What to Specify When Ordering
- Quantity — the minimum order is 10 units; many departments order several so groups can work in parallel.
- Plate power supply and voltmeter — this listing does not say whether a supply for the condenser plates is included, so state what your bench already has and ask for the rest.
- Timing — add stopwatches if your lab needs them for timing the drops.
- Delivery details — destination country, port or city and preferred delivery terms for export orders.
Frequently Asked Questions
What does Millikan’s oil drop apparatus measure?
The charge on the electron. Students measure the charge carried by individual oil drops and find that every value is a whole-number multiple of one basic charge.
What value of the electronic charge should students expect?
The accepted value is about 1.602 × 10⁻¹⁹ coulomb. Class results scatter around it, and the scatter shrinks as more drops are timed carefully.
Is the apparatus difficult to set up?
No. According to its specification it needs no critical adjustment and oil drops appear in the microscope within seconds. The microscope moves smoothly on slow-motion screws in both horizontal and vertical directions.
How is the speed of a drop measured?
Through the measuring microscope, which has a micrometer scale. Students time the drop as it passes between scale divisions, first falling freely and then under the electric field.
Are a power supply and stopwatch included?
The listing describes the condenser, light source, microscope, atomizer and cast iron stand, and does not mention a plate supply or stopwatch. Ask for them in your enquiry; JLab also lists digital stopwatches separately.
What details does an export quotation need?
Quantity, destination country and port or city, delivery terms (for example FOB or CIF), any packing or labelling instructions, and the tender reference if one applies.
Who manufactures Millikan’s oil drop apparatus?
Jain Laboratory Instruments Pvt Ltd (JLab) makes it at its works in Ambala, Haryana, India, and quotes for it directly as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a manufacturer of physics lab instruments in India, incorporated in 2017 and located on Hargolal Road, Ambala, Haryana. Its cast iron stand, microscope carriage and condenser are produced at JLab’s own works rather than traded, so universities, colleges, dealers and importers buy directly from the maker; every apparatus is visually inspected before dispatch, and spares and repeat orders come from the same source. JLab exports worldwide and ships to buyers in every region — for example Papua New Guinea in Oceania, Italy in Southern Europe, Switzerland in Western Europe, South Korea in East Asia and the Maldives in South Asia. Tender buyers can refer to the JLab lab tenders page.
Pair It With e/m Apparatus and Timing
- e and m By Thomson Bar Magnet Method — measures e/m; with the charge from this apparatus it gives the electron’s mass.
- e and m by Magnetic Focusing Method — e/m by focusing a CRT beam with a ring-type solenoid.
- e and m by Helical Method Solenoid Method — e/m with the tube inside a multi-layer solenoid.
- e and m by Short Solenoid Method Magnetron Method — e/m with a magnetron and solenoid.
- Stop Watch Digital — a sturdy digital stopwatch with neck lanyard for timing the drops.
See the complete E M Apparatus range or the wider Scientific Instrument range.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the quantity (minimum 10 units), whether you need a plate supply or stopwatches with it, and the delivery location through the contact page.
Last updated: 9 October 2026
