... Supporting softwares and correspondence patterns (when ordering chooses): Supervisory system; RS-485 Modbus,4-20mA, CEMS Output Power Source and Environment Condition ... the standard sampling tie-in, the sampling rubber tube, the electric cable, the zero counting filter, the power source adapter, softwares ... -6L/minMonitored channel0.3,0.50.3,0.5CommunicationRS232/485,4-20mA.0-5VRS232/485,4-20mA.0-5V