Rectifiers, power supplies, [ referenceelectrodes, ] electric meters, [ remotelog, tape, CD, disk and graph recordersto record electrical measurements, ]electrical measurement monitors, [ displays, ] test instruments for testing electric current and corrosion levels, electrical corrosion monitors [, electronic probes for measuring corrosion and ground potential, coupons for measuring resistance and corrosion, computer hardware and computer software that analyzes and makesrecommendations in re...