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Resistance Selector
The Resistance Selector (Product Code: SLE/EAM/37) is a compact substitution unit: one rotary switch chooses between twelve fixed resistors, from 100Ω to 100kΩ, brought out to 4mm sockets. It saves students from sorting through colour-coded resistors when they want to try several values in the same circuit, and it lets a teacher change a load or bias resistor mid-demonstration with a single turn. Manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) in Ambala, it sits comfortably among the electronic lab instruments that India’s schools, polytechnics and colleges use for circuit practicals.
Specifications
| Parameter | Detail |
|---|---|
| Type | Mini resistance substitution unit |
| Selection | Single rotary switch, twelve positions |
| Values | 100Ω, 330Ω, 470Ω, 680Ω, 1kΩ, 3.3kΩ, 4.7kΩ, 6.8kΩ, 10kΩ, 33kΩ, 47kΩ, 100kΩ |
| Tolerance | 5% (all values) |
| Power rating | 0.5W (all values) |
| Connections | 4mm sockets |
Typical Use
The values follow the familiar preferred-value pattern used in electronics, so students meet the same numbers they will later find on real circuit boards. A typical session uses the selector as a trial resistor: set a value, observe an LED’s brightness or a transistor’s collector current, step to the next position and compare. It is equally handy for plotting a load line, choosing the lower arm of a potential divider for a sensor, or setting the gain of an amplifier circuit kit without re-soldering anything.
Because every resistor is rated at 0.5W, the lowest settings deserve care when a higher supply voltage is connected — start on a high value and switch downwards while watching the current. For work that needs values between the twelve fixed steps, pair the selector with a decade box.
Manufacturer
Jain Scientific Equipments Private Limited, trading as ScienceLab, produces this selector at Ambala in Haryana. The company is a registered MSME enterprise (Udyam UDYAM-HR-01-0003714), and shipments to overseas buyers are handled under its DGFT Importer-Exporter Code AAECJ8618A. Visit our company profile for more about the organisation.
Related Electricity and Magnetism Equipment
Items commonly wired up alongside the Resistance Selector:
- Decade Resistance Box — fills in the values between the selector’s fixed steps
- Capacitance Selector — completes an adjustable RC pair for timing and filter work
- Resistance Substitution Box — another substitution option for circuit experiments
- Digital Multimeter — checks current and voltage at each setting
- Stackable Leads — 4mm plug leads to connect the sockets
For the wider range, visit the Electricity and Magnetism category page.
Frequently Asked Questions
How many resistance values does it offer?
Twelve, from 100Ω to 100kΩ, chosen with one rotary switch.
What tolerance and power rating do the resistors have?
All twelve are 5% tolerance and rated at 0.5W.
Can I get a value that is not on the list?
Not from this unit alone. Combine positions with other components, or use a decade resistance box when you need any whole-ohm value.
What kind of leads does it need?
Connections are made through 4mm sockets, so any standard 4mm plug lead will fit. Leads are not listed as part of the supply.
Is it suitable for mains-voltage circuits?
No. It is intended for low-voltage teaching circuits; check the current at each setting so the 0.5W rating is not exceeded.
Is a calibration certificate offered?
Ask our team when you enquire and we will advise what documentation can accompany your order.
Do you export the Resistance Selector?
Yes. We supply institutions in India and international markets; send the quantity and destination through our contact page.
Request a Quote
Add the Resistance Selector to your enquiry cart or write to us with your quantity, and we will respond with pricing and delivery details.
Last updated: 24 September 2026
