Constantan wire, Eureka, 50g reel

Constantan wire, Eureka, 50g reel

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Grouped product items
Product Name Qty
Constantan wire, Eureka, 18 SWG, 50g reel
$15.69 $14.26
Constantan wire, Eureka, 20 SWG, 50g reel
$16.50 $15.00
Constantan wire, Eureka, 22 SWG, 50g reel
$18.15 $16.50
Constantan wire, Eureka, 24 SWG, 50g reel
$19.03 $17.30
Constantan wire, Eureka, 26 SWG, 50g reel
$22.00 $20.00
Constantan wire, Eureka 28 SWG 50g reel
$24.04 $21.85
Constantan wire, Eureka, 30 SWG, 50g reel
$29.15 $26.50
Constantan wire, Eureka, 32 SWG, 50g reel
$32.89 $29.90

'Constantan' resistance wire, Eureka, 50g reel.  

56% copper and 44% nickel.

Diameter mm  SWG  Ohms / metre  Approx metres on 50g reel 
1.22 18 0.42 4.7m 
0.91 20 0.747 8.5m 
0.71 22 1.234 14.1m 
0.56 24 1.997 22.7m 
0.46 26 2.987 34.0m 
0.38 28 4.413 50m 
0.32 30 6.288 71m 
0.27 32 8.31 94m 

Resistance wire is made from alloys of different metals to deliberately create a high resistance wire. Sometimes the resistance wire is used for heating purposes (heating elements, electric kettles, and similar) but other times it is very important that the resistance does not alter as the wire heats.