Quick Answer: The Decade Resistance Box gives switchable resistance values from 1 ohm to 1 megohm using manganin or constantan wire and rotary dials, in single- to six-decade versions. It connects through 4 mm shrouded brass binding posts.
Last updated: October 2026
Key Features
Manganin or constantan resistance wire with a low temperature coefficient
Rotary dial switching with low contact resistance
Single- to six-decade versions, 1 ohm to 1 megohm total range
Bakelite panel in a metal or wooden housing
4 mm shrouded brass binding posts
Technical Specifications
Specification
Value
Resistance wire
Manganin / Constantan, low temperature coefficient
Switching
Rotary dials, low contact resistance
Range
1 ohm to 1 megohm total
Versions
Single to six decades
Panel and housing
Bakelite panel; metal or wood housing
Terminals
4 mm shrouded brass binding posts
HS code
9030.33
About This Product
A decade box lets a known resistance be dialled in quickly for DC and low-frequency AC bridge circuits. In practicals it is the known arm of a Wheatstone bridge or metre bridge, a standard in potentiometer work, and a variable load for checking Ohm’s law and Kirchhoff’s laws.
Frequently Asked Questions
What range does the Decade Resistance Box cover?
Versions run from a single decade up to six decades, covering a total range of 1 ohm to 1 megohm.
