... of connection without keyboard display and alarm of buzzer)3: signal output: one channel standard isolation RS485 output ... so on.5:display:2*10backlit LCD,displaying instant flow rate,velocity,positive,negative,net totaliser flow rate.6:operating: 4 keypad tactile ... )4:remote second times operation meter(wall-mounted type,panel-mounted type)5:PT100 there wire platinum resistor(used for calorimeter)6: ...