... functions 2.high quality &competive price electrodialysis rectifier used for food Product usageSuitable for seawater desalination , the sea salt refining dairy, ... essence and purification of chemical products, etc. Also be used for food, light industries,,and extract high pure water treatment ... The digital timer alarm system;Ampere-hour meter;RS485 or RS232 standard interface 4-20MA,0-5V control signal ...