KayVybin Corporation offers Digital Secondary Cable Tester . KayVybin Corporation also manufactures Water cooled dual conductor, air cooled sub/jumper cable, water cooled single conductor, copper shunts, cable hanger, jumper cables etc. Digital Secondary Cable Tester is a device that measures an increase in DC resistance due to deterioration of the secondary cable. Digital Secondary Cable Tester detects an abnormality in the secondary circuit caused by insufficient bolting or oxidizing of the contact surface. Digital Secondary Cable Tester has a compact and rugged design.