Nursery expansion, new installation, unreliability or controller breakdown, if you are in the market for a new irrigation controller there are an increasing array of options available that should be investigated. The electronics industry has progressed at an amazing pace in recent years and the evolution of irrigation controllers has continued with options now available that were not thought possible only a few years ago. One system that is becoming increasingly popular because of versatility and decreasing costs is the two-wire irrigation control system.