1.ex mark :Exib i 2.1zone&2zone. 3.Explosive gas :IIA,IIB,IIC type, ... -106)kpaRelated Equipment:HDK coupler2,The Intrinsically safe parameters see table 1: Parameters Item Max input Voltage DC60VMax input Current 30mAThe ... flow voltage AC56VMaximum fluid flow current 10mA3,Electric-acoustic index table 2: Mining simulation line length0km5km10kmSend loudness rating(SLR)≥2≤15 ...