... gas,and general gas. WT-400 series multi-flow rate totalizer(can with temperature and pressure compesation function)Dimention: ... setable.Multi parameter display such as instant flow rate,total flow rate,temperature and pressre .Small signal drop out function ... , serial bi-directional communicating connection RS485/RS422/RS232/Modembaud rate:300~9600bps selectablefeed output: DC24V/50mA WT-400 series ...