1. a copper-nickel alloy with high electrical resistance used in electrical instruments and thermocouples
Usage: technical

Examples

• The thermocouple was made with constantan wire for accurate temperature measurement.
• Constantan’s resistance remains stable across different temperatures.
• The electrical engineer selected constantan for the precision resistor.
• Laboratory equipment often uses constantan in temperature sensors.
• The alloy constantan contains approximately 55% copper and 45% nickel.