The Cable entry point must NOT under any circumstances be submerged
On the Horizontal switches they must be fitted through the wall of a tank so that the cable is on the outside
On the vertical type the mounting thread and cable entry must be above the highest level of the liquid
Metal Level Switches Series 1700
IP64 rated Output is SPST that will either be normally closed or normally open depending on the orientation of the float, the position of which can be reversed