Dial Type Resistance Boxes
2021. Single Dial : With Constantan Coils
Range Total Resistance
(a) Tenths 1
(b) Units 10
(c) Tens 100
(d) Hundreds 1000
2022. Two Dial :
Range Total Resistance
(a) Tenths and units 11
(b) Units and tens 110
(c) Tens and hundreds 1100
(d) Hundreds and thousands 11,000
2023. Three Dial :
Range Total Resistance
(a) Tenths, units and tens 111
(b) Units, tens and hundreds 1110
(c) Tens, hundreds and thousand 11110
2024. Four Dial :
Range Total Resistance
(a) Tenths, units, tens & hundreds 1111
Range Total Resistance
(b) Units, tens, hundreds & thousands 11110
2026. Decade Resistance Box accuracy 1% made with Metal Film Resistance
(a) Single Dial
(b) Two Dials
(c) Three Dials
(d) Four Dials
(e) Five Dials
Resistance Boxes Plug Type
2031. Resistance Boxes : Pye type or Gamberal type. Educational quality. Accuracy : Constantan coils 1% Manganin coils 0.5%
Range in ohms No. of coils
(a) .01 to 1 5
(b) .1 to 1 or 1 to 10 5
(c) .1 to 5 or 1 to 50 8
(d) .1 to 10 or 1 to 100 9
(e) .1 to 50 or 1 to 500 12
(f) .1 to 100 or 1 to 1000 13
(g) .1 to 500 or 1 to 5000 16
(h) .1 to 1000 or 1 to 10000 17