Cathtect Engineering (Pty) Ltd Manufactures and Supply a number of coupons and reference electrodes namely: AC Coupons & DC Coupon, Long Life Underground Use reference electrodes, Long Life Portable Electrodes, Portable Reference Electrodes and a Retractable. These products are used to facilitate the measurement of corrosion of a particular area in a pipeline for control purposes and obtain measurements on buried or submerged structures and pipelines.