Frequency + Analogue Input

Net Oil Computer Contrec 515 – FA02 Add/Subtract Flow Computer - 2 Channel Input (Mass)
Net Oil Computer Contrec 515 – FA03 Add/Subtract Flow Computer - 2 Channel Input (Energy)
Net Oil Computer Contrec 515 – FA01 Add/Subtract Flow Computer - 2 Channel Input (Volume)
Net Oil Computer 515 – FC01 Single C... Flow Computer