The APR-2000/Y is manufactured by Aplisens S.A. It is a hydrostatic tank level sensor, with a maximum tank depth of 6 m. It has 4...20 mA output signal, and HART protocal. It also has a dividing diaphragm, safety ring and equalization hole. The precision rate is 0,16%. Plus, it is Intrinsic safety (ATEX certified).