Resistance Box Constantan & Manganin Manufacturer,Supplier and Exporter in India
Product Code : JA-SI-8096
The Resistance Box Constantan and Manganin (SKU JA-SI-8096) is a dial-type decade resistance box. Each decade uses an eleven-position switch designed for low contact resistance, with moving contacts of phosphor-bronze lamination for repeatable readings. The coils are wound non-inductively, varnished and aged so the values hold over time, and the bakelite panel is enclosed in a polished teak wood box.
Specifications
Construction details from the product data:
| Product | Resistance Box Constantan & Manganin |
| SKU | JA-SI-8096 |
| Switches | Eleven-position, low contact resistance |
| Moving contacts | Phosphor-bronze lamination |
| Panel and box | Bakelite panel in polished teak wood box |
| Coils | Non-inductively wound, varnished and aged |
| Grade A | Double silk covered manganin wire |
| Grade B | Double silk covered constantan wire |
Scope of supply and ordering
Grade A (manganin) and Grade B (constantan) boxes are made separately, so name the grade and quantity on your enquiry; packing is confirmed on the quotation.
Frequently asked questions
What is the difference between Grade A and Grade B boxes?
Grade A boxes are wound with manganin wire and Grade B boxes with constantan wire.
Why is manganin used in the Grade A box?
Manganin has a negligible temperature coefficient of resistance, so the coil values change very little with temperature.
Related products
- Resistance Substitution Box
- Economical Resistance Box Dial Type
- Resistance P.O. Box
- Four Dial Condenser Box
More resistance boxes are shown in our scientific instrument range.
Request a quote
Please send the grade and number of resistance boxes through the contact page. For tender or project supply, see our tenders page.
