FTL31-AA4U3BAWSJ Endress+Hauser - Liquiphant Point Level Switch

The FTL31-AA4U3BAWSJ is an Endress+Hauser Liquiphant FTL31 point level switch for liquids, using a vibrating tuning fork to detect level in tanks, vessels and pipes regardless of conductivity, buildup or turbulence.

The Liquiphant FTL31 covers applications where float switches or conductive, capacitive and optical sensors have historically been used, and continues to work where those principles fail due to conductivity, buildup, turbulence, flow conditions or air bubbles. It detects liquids above roughly 0.7 g/cm3 density (0.5 g/cm3 optionally) and is available in 3-wire DC-PNP (10 to 30 VDC) or 2-wire AC/DC (20 to 253 VAC/DC) electronic versions, switchable between maximum-safety (MAX, for overfill prevention) and minimum-safety (MIN, for pump dry-run protection) operating modes with a fail-safe quiescent-current principle. The housing is 316L stainless steel, optionally fitted with an M12x1 plug for IP69 protection, rated for process temperatures up to 100 or 150 degrees C depending on configuration. This AA4U3BAWSJ configuration is not suitable for hazardous areas; the FTL33 variant is recommended for hygienic duty.