Rosemount 320Hp-10-55 High Purity Ph SensorRosemount AnalyticalModel: 0320Hp-10-55P/N: 320Hp-10-559241547-00/AP/N: 2001853S Assy Ref Cell Hi PurityRev GClass I. Div. 2 Gp A, B, C & D;Class Ii. Gp. E, F & G;Class Iii.For Use With Model 54E9241330/31/32-0C/C320B/330BRev HP/N: 22994-00S Assy, Elctd Ref Dbl JctMade In MexicoWeight: 4.660 Kg