Air velocity sensors Air velocity sensors -series PFLM protocol ModBus, RS485 line range: 0 ÷ 20 m/s Software configuration: we recommend the program USBset Leaflead (PDF) Air velocity sensors - series PFLV configurable ranges from 0 ÷ 10 V or 0 ÷ 20 mA range 0 ÷ 20 m/s Software configuration: we recommend the program USBset Leaflead (PDF)