I need to buy a level switch for a quench tower water drainage system. I intend to use its output directly to open a solenoid valve to drain the tank when the switch detects water and close it afterward when the water recedes. I have identified make and model of a level switch I think is good. But the manufacturer provides multiple types of electrical outputs. It would be great if someone could advise on which of the following type is best for a simple level switch - solenoid valve circuit.
P.S: I am a newbie regarding electrical stuff. I'll consult a friend who will help me to design the circuit, but I just need to place the order for the level switch.