The sensor probe can be used where the use of  sensor tape could be susceptible to damage from foot fall or other processes.  The probe is housed in a strong protective plastic housing with adjustable floor mounting brackets allowing the conductors to be set between 0 and 25mm from the floor.  A number of probes can be connected in series to a single alarm panel or a single zone on a multizone panel.  This is often the case in plant rooms where a series of probes can be mounted at a number of points around the room.  The sensor probe can also be used where a multi level alarm system is required that accounts for a small amount of water triggering a pre-alarm and any above a higher level forcing a full alarm.