The concept of utilizing electrical conductivity of most liquids as a means of achieving float less level control has won widespread acceptance as the most reliable/versatile system of its kind. This has been successfully applied throughout the Fertilizer, Thermal Power Station, Refinery, Steel, Cement, Sugar, Chemical Processing Industries, in Municipal water works and sewage disposal plants and other Industrial applications, where close, constant control liquids and moist bulk materials is an important critical factor.