Dometic DTM01P Single Level Tank Monitor For Holding Tanks The DometicSinge Level tank monitor system specifies when waste holding tank is full. Virtually any rigid tank material accommodates probe assembly installs. Indicates when holding tank is full and toilet should not be flushed (to prevent overfilling) Low power usage, only 0.016 A Includes full-tank sensor Complements other SeaLand and Dometic panels and controls Specifications: Dimensions Depth: 2 1/2″ Width: 2 1/2″ Height: 4 1/2″ Weight: 1/4 lbs