... mounting technology,convenient preferences,totally chinese menu operation,easily use,with self-check and diagnosis functions;5.With ... isolation protection,can absorb 250mA current and withstanding 35V voltage(Not isolated with pulse output)Digital communicationsRS232,RS485, ... Tongjia Industrial Park,Changzhou,Jiangsu Prov.,ChinaWebsite:www.qf-meter.comSkype:vicky_china68 Tel:+86-519-85327611 Fax:+86- ...