Dynamic Contact Resistance or Incremental Resistance, measured in milli-ohms, is the average of a set contact resistances measurements of closed contacts, when the contact is in continuous operation under load.
During this time, there is no actual opening of the contact, but only a change in contact resistance. Four-terminal Sensing and shielded cables should be used for accurate contact resistance measurements. DCR could be a measure of the long term durability of a reed contact.
