Setra MRCSC Transducer W/Display Low Differential *** This Item replaces 2601MS1 for 0.1"wc AND 0.25"wc applications only for 0.5"wc and 1.0"wc, for use item # MRGSA *** 0.1"W.C./25/Pa Unidirectional 0.25"W.C./50/Pa Unidirectional ±0.1"W.C/±25/Pa Bid