... sensors and normally open,dry contact devices (float switch,pressure of vacuum switch,optical probe with adapter,limit switch,etc.). Up ... 's output form to often open closed coexist freedom of choice.Good ESD,and surge transients immunity technology,guaranteed that ... :Storage temperature -40 oC—60 oC(0 oF—140oF)Operating temperature -20oC—50 oC(32 oF—122oF)Operating humidity 5% —95%(No condensation ...