The S4A Model is a belt-weigher with IP 67 protection rating of. It is specifically intended for industrial plant applications. The weighing range distance is from 1 to 4 idler stations. This product features a pulse generating speed transmitter, optoisolated RS485 serial ports, optoisolated 4-20mA flow rate output, and a failure alarm hardware output. It also comes with a periodic self correction for thermal drift.