... ;Save the costs of compensation wire and install temperature transmitter;Safe, reliable, and long life;Automatic compensation of cold junction temperature ... : IP6510, proof grade:Flameproof: d Ⅱ BT4 d Ⅱ CT5 d Ⅱ CT6Intrinsically Safe: ia Ⅱ CT611, the insulation resistance between the insulation resistance: meter ...