Isekwe kwi-1997, i-Sothis (i-Suzhou) ye-Environmental Technology Co., Ltd. inikezela ngomgca opheleleyo wezixhobo zokucoca, ukubonisana kunye nezisombululo kuluhlu olubanzi lwamashishini kunye nezicelo.Ezi mveliso zihlulwe zibe ziinxalenye ezintathu ezibandakanya izixhobo zokuvavanya, izixhobo kunye nomhloli wokucoca. .Izinto eziphambili yi-particle counter / sampler yomoya / ibhentshi ecocekileyo / ibhokisi yokudlula / ishawa yomoya / igumbi lokulinganisa /.