Water level control accessories detect levels of water and then feed that information into other devices that control the water. Raptor Supplies offers a range of these water level control system accessories from brands like Lumenite Control Technology Inc. and Vulcan Hart. Water level control accessories include control boards, inter connect cables and liquid level probes. Liquid level probes have typically 3 parts which are positioned at different heights inside a water container. So as the water level reaches each probe, it will command the flow of water to increase or decrease by certain amount.