Resistance Substitution Box
Product Code : EL-EAE-10283
Quick answer: The Resistance Substitution Box contains 12 radio-type resistors at standard preferred values, covering 100 ohms to 470 kilo-ohms, each selected through its own terminal against a common connection. It lets students try different resistances in a circuit quickly without soldering. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Item | Specification |
|---|---|
| Resistances | 12, radio-type, standard preferred values |
| Range | 100 ohms to 470 kilo-ohms |
| Selection | Via terminals with a common connection |
How it is used
A substitution box is a quick way to find the resistor value a circuit needs. One lead goes to the common terminal and the other is moved from terminal to terminal, putting each of the 12 resistors into the circuit in turn. The student watches the effect, on a meter reading, a lamp, the gain of an amplifier or the bias of a transistor, and settles on the value that works before fitting a permanent component.
Because the resistors are standard preferred values, the chosen value can be bought and fitted directly. The box is also useful for the substitution method of measurement, where an unknown resistance in a circuit is replaced by a known one that gives the same meter reading.
- Connect one circuit lead to the common terminal of the box.
- Connect the other lead to the terminal of the first value to be tried.
- Switch on and note the circuit's behaviour or meter reading.
- Move the lead to other terminals until the required result is obtained, then note the value.
Key features
- 12 resistors spanning 100 ohms to 470 kilo-ohms
- Standard preferred values, so the chosen value is easy to source
- Simple selection through individual terminals and a common connection
- Radio-type resistors suited to electronics and circuit work
- Saves repeated soldering when trying values in student circuits
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Resistance Substitution Box at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
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The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What resistance range does the substitution box cover?
100 ohms to 470 kilo-ohms, in 12 standard preferred values.
How is a resistance value selected?
One lead is connected to the common terminal and the other to the terminal of the value required.
What is the price of the Resistance Substitution Box?
Prices are not published on the website. Add the Resistance Substitution Box to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-EAE-10283 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Resistance Substitution Box?
Yes. Lab Exports manufactures the Resistance Substitution Box at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-EAE-10283.
Request a quote
Email [email protected] with the house code EL-EAE-10283 and the quantity, or add the Resistance Substitution Box to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
