Capacitance sensing allows RF Model LP50 to detect liquid through nonmetallic tanks as thick as 1 in. General-purpose switch achieves ±1 mm accuracy in water. Configured NC or NO, relay or FET output interfaces with SCADA, PLC, or alarm. Polysulfone enclosure carries NEMA 4x and IP 68 ratings, as well as CSA/NRTL (UL) and CE approvals. Intrinsically safe model is also available.