FLOOD Alarm AUTO Water Main Shut down

with automatic water main shut off valve needed. Need preferably multiple water sensor (temperature sense would be a nice bonus) strung on something like Serial 485 bus or network cable. Would be nice also if it were to function strictly on DC power. Must have electrically actuated 3/4 inch cold water shut off valve. Data history/storage is not required but computer interface would be a desirable OPTION. The application is for home owner Flood annunciation (broken/leaking plumbing/heating) so price is somewhat an issue however the SMB market (Small Mid size Business) would also be a target audience with greater price flexibility. Single sensor simple latch trip valve ONLY is acceptable (i.e., no annunciation or communication), simply auto shut down. Thanks for your help.

Alfred