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Resistance Box : Dial Type (Constantan & Manganin) Manufacturer,Supplier and Exporter in India

Product Code : EL-IMIC-10316
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Decade Resistance Boxes incorporate the latest design switches so as to ensure low contact resistance.

Eleven position switches are employed.

Panel: An insulating panel of bakelite enclosed in an elegantly polished teak wood box.

The moving contacts are constructed from phosphor-bronze lamination to ensure long life and repeatability of results.

Imported double silk covered manganin or constantan wire is used in Grade A and Grade B resistance boxes separately. Manganin has a negligible temperature coefficient against copper.

Resistance Coil: Resistance Coils are non-inductively wound, properly varnished and aged for permanence of values over a long period.

Accuracy: Accuracy is brought within the field ±0.05% to ±0.1% for constantan coils (B Grade) and ± 0.02% to ±0.05% for manganin coils (A Grade).

Contact Resistance: Contact Resistance per decade is of the order of 0.0015 ohm.