LU10 Ultrasonic Level Switch
Product Announcement from Flowline, Inc.
New, Ultrasonic Level Sensor is an Excellent Solution for a Broad Range of Liquids with Light Coating or Scaling Characteristics
Relay or FET switch output provides interface with PLC, SCADA or alarm
Los Alamitos, California (April 20, 2000) – A new, ultrasonic LU10 level sensor from Flowline is an excellent choice for a broad range of liquids including those with light coating or scaling-type characteristics. Liquid examples include xylene, chromic acid and light cooking oil. The relay or FET output provides a reliable switch interface with remote devices such as PLC, SCADA or alarm. For maximum flexibility, the sensor is offered in general purpose and intrinsically safe versions with two probe lengths (3.0" and 4.5") and PP of PFA Teflon materials. Sensor rating is NEMA 6 (IP68) and includes CSA/NRTL (UL) and CE approvals. Selectable switch states are NO or NC. Accuracy is ±1 mm in water.
The LU10 technology employs two piezoelectric crystals separated by an air gap in the fork-shaped tip of the sensor probe. One crystal vibrates at a nominal frequency of 1.5 MHz and transmits an acoustic signal into the center of the gap. As the probe tip becomes immersed in liquid, the crystals acoustically couple and the switch changes state.