Copper-nickel and nickel-chrome heating wires manufactured to international specifications have tolerances on resistance in a range of 5% - 10% in a typical diameter size range of 1.00mm to 0.10mm.
Many precision wire applications require much closer resistance tolerances of 1% to 2%, which requires much more attention to process control and monitoring as well as a high degree of testing and sorting.
NOCKERS ENGINEERING PRODUCTS have worked with our heating wire principals to produce to this exacting standard and to sort further into batches of spools having identical resistance in ohms per metre.
The wires we supply to our customer are further sampled before being heat soaked and tested at various temperatures above ambient to confirm absolute material stability. This is only possible with the use of virgin materials in the original alloy melt, as contaminated copper from scrap addition to the melt, for instance, would result in them not being able to achieve the high standards required.
Through our different wire principals we are able to offer our customers the flexibility to choose appropriate wire standards to meet their needs to enable them to improve their own products as well as make them more competitive in the market.