Siemens 7ML5221-2AA11 SITRANS Probe LU ultrasonic level transmitter – continuous, non-contact measurement, range up to 12 m (40 ft). Monitors level and volume in liquids and slurries. PROFIBUS PA optional. LU240 7ML51 (supplied without cable gland) measuring range/sensor material: 6 meters (20 ft), ETFE process connection: 2″ NPT ((tapered), ANSI/ASME B1.20.1) communication/output: 4 to 20 mA, HAR