- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Resistance Box
Resistance Box (Product Code: SCL-345/071) is a plug-type standard resistance used to insert known values from 1 to 1000 ohm into circuits in school and college physics laboratories. Constantan coils connect across 1/2 inch brass blocks inside a teak wood case, and removing a brass plug brings the matching coil into the circuit. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Brass plug type |
| Range (capacity) | 1 to 1000 ohm |
| Coils | Constantan |
| Blocks | 1/2 inch brass blocks |
| Case | Teak wood (deluxe quality) |
| Plugs | Multiple brass plugs for selecting resistance values |
| Product code | SCL-345/071 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Resistance Box Used For?
A plug-type resistance box provides known resistances for circuits that measure voltage, current and resistance. In meter bridge and Wheatstone bridge experiments it forms the known arm, while in Ohm's law and potentiometer work it limits current or acts as the shunt when finding a cell's internal resistance.
Each brass plug shorts out one coil; pulling it out adds that coil's value, so the resistance in circuit is the sum of the unplugged coils. Seat plugs with a gentle twist to keep contact resistance low, and before switching on, check that the right plugs are out — with every plug inserted the box offers practically zero resistance. This makes it a basic resistance box for lab benches in India and abroad.
What to Specify When Ordering
- Range: this box covers 1 to 1000 ohm; a separate higher-range model is listed for galvanometer-conversion work.
- Quantity per laboratory or per student group.
- Companion items such as galvanometers, meter bridges or plug keys.
OEM Manufacturer
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM that makes this resistance box at its own licensed factory at Saha, Ambala, Haryana, India. The finished boxes go factory-direct to schools, colleges, dealers and importers, and requests for replacement plugs are handled by the manufacturer itself. Visit the company profile to learn more.
Related Physics Lab Equipment
The resistance box is usually paired with bridge apparatus and a detector. Useful companions and alternatives:
- Resistance Box 1-5000 Ohm Range — the higher-range plug box.
- Meter Bridge — uses the box as its known resistance.
- Wheatstone Bridge Apparatus — for resistance comparison by the bridge method.
- Decade Resistance Box — a decade-style alternative for variable resistance.
More resistance and circuit apparatus is in the Physics Lab category.
Frequently Asked Questions
What is the range of this Resistance Box?
This Resistance Box covers 1 to 1000 ohm using constantan coils selected by brass plugs. For experiments that need several thousand ohms, such as converting a galvanometer into a voltmeter, the Resistance Box 1-5000 Ohm Range is the more suitable choice.
How do you read the value on a plug-type Resistance Box?
On a plug-type Resistance Box, the value in circuit is the sum of the coils whose plugs have been removed. Inserting a plug shorts its coil through the brass block, so with all plugs in place the box adds practically no resistance.
What materials is the Resistance Box made of?
The Resistance Box uses constantan coils, 1/2 inch brass blocks, brass plugs and a deluxe-quality teak wood case. Constantan keeps the coil values steady as the room warms, and the brass blocks give low-resistance plug contacts.
Who manufactures the Resistance Box?
The Resistance Box is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), which is the OEM and produces it at its licensed factory in Saha, Ambala, Haryana, India. Schools, colleges and dealers can order direct from the maker and ask it for replacement plugs.
Is a calibration certificate available for the Resistance Box?
The standard listing for the Resistance Box does not include a calibration certificate. If your laboratory or tender needs one, mention it in your enquiry through the contact page, and we will tell you what documentation can be arranged before you order.
How should the Resistance Box be maintained?
Keep the Resistance Box closed and dry when not in use, clean plugs and blocks with a soft dry cloth if readings become unsteady, and seat each plug with a gentle twist. Avoid oiling the contacts, because oil films raise contact resistance and cause errors.
Request a Quote
Tell us how many Resistance Box units you need through the contact page, or add the item to the enquiry cart. Your quotation will come from the manufacturer directly.
Last updated: 24 September 2026
