Kelvin's Bridge Trainer Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12113
Indian Lab Suppliers supplies the Kelvin's Bridge Trainer (Product ID: 12113) as part of its electronics engineering lab equipment range. It is a Kelvin double bridge trainer for measuring resistances below 1 Ω with a digital null display.
Quick Answer
The Kelvin double bridge adds a second set of ratio arms to the Wheatstone bridge so that lead and contact resistances drop out of the balance equation. Three unknown resistances of 0.3, 0.4 and 0.8 Ω are provided, with known arms R1 (100 kΩ, 20 kΩ, 10 kΩ) and R3 (1 kΩ, 200 Ω, 100 Ω). A +5 V DC supply feeds the bridge and a 2 V digital panel meter on the board shows the null. It runs on 230 V ±10%, 50 Hz.
Key Specifications
| Parameter | Detail |
|---|---|
| Unknown resistances | 0.3 Ω, 0.4 Ω, 0.8 Ω |
| Known arm R1 | 100 kΩ, 20 kΩ, 10 kΩ |
| Known arm R3 | 1 kΩ, 200 Ω, 100 Ω |
| DC supply | +5 V |
| Null detector | 2 V digital panel meter |
| Mains | 230 V ±10%, 50 Hz |
| Size (W x D x H) | 240 x 345 x 110 mm |
Where This Is Used
Used in electrical measurement labs for low-resistance work; the Experimentations with Kelvin's Bridge (Product ID: 12084) is a similar board with 0.5–1.5 Ω unknowns and a digital galvanometer. Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
Why is a Kelvin bridge used for low resistance?
It cancels lead and contact resistance, which would swamp readings below 1 Ω.
Which unknown resistances are supplied?
0.3, 0.4 and 0.8 Ω.
How is the null shown?
On a 2 V digital panel meter.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Physics Lab Equipment
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