The Carlo Gavazzi CLD2EA1C230 Module is a level monitoring relay for use with conductive fluid levels. The device is designed to detect and respond to the presence of a liquid in a tank or reservoir. The CLD2EA1C230 operates on 230V AC power and includes a power LED, a normally open (NO) and normally closed (NC) contact output, a digital display, and a single-pole, double-throw (SPDT) output contact. The contacts will switch at a set level — when the preset level increases, the NO contact closes and the NC contact opens. The digital display indicates the current fluid level, as well as any contacts that have been opened or closed. The device can be used in a wide range of applications such as sump pumps, water tanks, oil tanks, and many others.