1. A sensor system for detecting a substance in a dialysate, comprising: a hydrophobic barrier configured to balance the substance in the dialysate with gas； a detector configured to detect gas； an interface located between the hydrophobic barrier and the detector and configured to provide hydraulic communication gas； iodine or several delivery mechanisms configured to transport gas from the hydrophobic barrier to the detector. 2. The sensor system of claim 1, wherein one or more delivery mechanisms provide a motive force capable of transporting gas from the hydrophobic barrier to the detector. The sensor system of claim 2, wherein the driving force circulates the gas within the interface. The sensor system of claim 2, wherein the driving force moves the gas back and forth within the interface. The sensor system according to any one of paragraphs. 2-4, further comprising electronic control means configured to control the driving force. 6. The sensor system according to any one of paragraphs. 1-4, in which one or more delivery mechanisms contain a carrier gas. The sensor system according to any one of paragraphs. 1-4, in which the length of the interface is from about 1 to 50 cm. 8. The sensor system according to any one of paragraphs. 1-4, in which the substance is ammonium and the gas is ammonia gas. 9. The sensor system of claim 8, wherein the hydrophobic barrier is configured to separate ammonium in the dialysate from gaseous ammonia at the interface. The sensor system according to any one of paragraphs. 1-4, in which the substance is years1. Сенсорная система для выявления вещества в диализате, содержащая:гидрофобный барьер, выполненный с возможностью обеспечения уравновешивания вещества в диализате с газом；детектор, выполненный с возможностью выявления газа；поверхность раздела, расположенную между гидрофобным барьером и детектором и выполненную с возможностью обеспечения гидравлического сообщения газа； иодин или несколько механизмов доставки, выполненных с возм
