N2.1 series of urea pumps belong to tank top installation structure, the pump and urea level quality sensor integrated urea pump, the quality sensor module is independently installed in the bottom of the urea pump, used to measure the mass concentration of urea solution.The urea pump adopts the standard bayonet (φ80) connection form and is installed at the top of the urea tank. It is convenient and reliable to install and has compact structure, especially suitable for compact vehicles.