SITRANS Probe LU is a 2-wire loop powered ultrasonic transmitter for level, volume and flow monitoring of liquids in open channels, storage vessels and simple process vessels. The SITRANS Probe LU is ideal for level monitoring in the water and wastewater industry and chemical storage vessels. Range of 6 or 12 m. Improved accuracy of 0.15% of range or 6 mm (0.25″), communications options: HART or PROFIBUS PA. The Probe is available as ETFE or PVDF to suit chemical conditions. for applications with varying material and process temperatures, the Probe LU incorporates an internal temperature sensor to compensate for temperature changes.