This device is used for sampling groundwater. With an outer diameter of approximately 44 mm, it can be used in 2-inch sampling tubes. The fiber fine filter can be washed out. The delivery hose is attached to the pump with a M14x1 nut. It is used together with the electric cable for suspending the pump and can be unscrewed, while the cable is waterproof and inseparably connected to the pump. A 12-volt car battery is typically used as the power source. The connection to the car battery is made via the included battery clamps. Cable lengths and hose lengths are coordinated and should not be altered. When pumping at the specified depth, approximately 2 liters per minute are delivered. At shallower pumping depths, the flow rate increases.