It is an economic , high-effect and practical unit to prepare the disinfectant. The disinfectant sodium hypochlorite it prepares can quickly-completely disinfect various pathogenic bacteria and viruses as colon bacillus , golden staphylococcus , hepatitis virus , hay bacillus and black mutated gemma etc. It can prevent from the diseases hepatitis , dysentery and cholera etc. It is easy and quick to prepare it with the raw materials salt and water , the cost is low to  prepare it of 500ml , the cost of salt and water is only 0.02 yuan RMB , so it is an ideal disinfector for the small public places like household , office , restaurants and bathing houses et