A flow sensor sub-assembly for sensing flow of a fluidic medicament comprising: a flow tube assembly through which said medicament flows having: a flow tube having a lumen, an outside diameter, a first end, and a second end; an inlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; and an outlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; a first transducer arranged at the inlet fitting; and a second transducer arranged at the outlet fitting, wherein said conical orifices (172, 197) of said inlet fitting and said outlet fitting are two-part tapers having an intermediate shoulder (173, 193) approximately half-way along the length of said taper, wherein a transducer adhesive bonds said first transducer to the inlet fitting and said second transducer to the outlet fitting, the transducer adhesive bonds the first transducer to the inlet fitting and the second transducer to the outlet fitting such that energy from the transducers is transmitted optimally across a transducer-fitting transmission zone while also dampening at least one of out of phase vibrations and rogue vibrations induced in the inlet and outlet fittings (180, 190) by transmission of sound energy between the first and second transducers (150, 151) and the inlet and outlet fittings (180, 190). a flow tube assembly through which said medicament flows having: a flow tube having a lumen, an outside diameter, a first end, and a second end; an inlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; and an outlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; a flow tube having a lumen, an outside diameter, a first end, and a second end; an inlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; and an outlet fitting having a conical orifice with an abutting shoulder, wherein said conical orifice is sized for insertion of either end of said flow tube; a first transducer arranged at the inlet fitting; and a second transducer arranged at the outlet fitting, wherein said conical orifices (172, 197) of said inlet fitting and said outlet fitting are two-part tapers having an intermediate shoulder (173, 193) approximately half-way along the length of said taper, wherein a transducer adhesive bonds said first transducer to the inlet fitting and said second transducer to the outlet fitting, the transducer adhesive bonds the first transducer to the inlet fitting and the second transducer to the outlet fitting such that energy from the transducers is transmitted optimally across a transducer-fitting transmission zone while also dampening at least one of out of phase vibrations and rogue vibrations induced in the inlet and outlet fittings (180, 190) by transmission of sound energy between the first and second transducers (150, 151) and the inlet and outlet fittings (180, 190).