The sensor comes in 2 varieties: Standard and Switch; each is available in 2 nominal voltages: 12 Vdc & 24 Vdc. Sensors are fitted with 6.5", 18 Ga., GXL type wires as standard connections. Other termination schemes are supported.
The Standard sensor contains only the sensing element in a standard National Pipe Threaded brass housing and requires only 2 electrical connections - Power and Ground. The sensor state is determined by monitoring the Power lead voltage with external circuitry.
The Switch model sensor incorporates a switch (Normally Open or Normally Closed) driven by the sensor element enclosed within the brass housing to drive a sensor status signal - Ground is common and only power needs to be supplied.