Post Office Box Plug Type Manufacturer,Supplier and Exporter in India
Product Code : ILS-EAE-10794
Indian Lab Suppliers supplies the Post Office Box Plug Type (Product ID: 10794) as part of its electrical and electronics range. It is a plug-type Post Office Box, a compact Wheatstone bridge for measuring unknown resistance.
Quick Answer
The main arm has sixteen non-inductive coils of 1, 2, 2, 5, 10, 20, 20, 50, 100, 200, 200, 500, 1000, 2000, 2000 and 5000 Ω, plus an infinity gap. The 3-ratio model has two ratio arms with 10, 100 and 1000 Ω coils each; the 4-ratio model adds a 1 Ω coil to each arm. With a DC battery it measures resistance from 0.1 Ω to 1,111,000 Ω. Two spring keys for the battery and galvanometer circuits are built in, and the whole bridge sits in a wooden box.
Key Specifications
| Parameter | Detail |
|---|---|
| Models | 3-ratio and 4-ratio |
| Main arm | 16 coils, 1 to 5000 Ω (11,110 Ω in total) |
| Ratio arms, 3-ratio | 10, 100, 1000 Ω each |
| Ratio arms, 4-ratio | 1, 10, 100, 1000 Ω each |
| Measuring range | 0.1 to 1,111,000 Ω (DC) |
| Accuracy | ±0.05% manganin coils; ±0.1% constantan coils |
| Brass block | 12 mm and 14 mm thick |
| Keys | Two spring keys (battery, galvanometer) |
Where This Is Used
It is used for resistance and specific resistance experiments in school and college physics. Related: Resistance Box Plug Type (Constantan / Manganin Coil) (Product ID: 10791) and Meter Bridge or Wheatstone Bridge With Pencil Jockey (Product ID: 10798). Browse the full Electrical and Electronics range or related Electricity and Magnetism products.
Frequently Asked Questions
What separates the 3-ratio and 4-ratio models?
The 4-ratio model adds a 1 Ω coil to each ratio arm.
What range can it measure?
0.1 Ω to 1,111,000 Ω with a DC battery.
Are keys included?
Yes, two spring keys for the battery and galvanometer.
Related Categories
Electrical and Electronics · Electricity and Magnetism · Physics Lab Equipment
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