Grundfos smart flo transducer for use with the CU301 CU321 Grundfos constant pressure controllers MODEL # MBS1900 PART # 98393361 0-120 psi Supply 9-28 VDC Output 4-20 mA BRAND NEW, repackaged from bulk supply This is the newest version transducer, compatible with the neweest Version 7 and older versions of the CU301