Liquid Level – Ultrasonic (LL6)

Low Maintenance Level Monitoring Solution.

  • For water/wastewater applications only
  • Includes Ultrasonic sensor
  • Non-contact, no moving part solution
  • Level reading range
  • 1 ft to 12 ft / 0.3 m to 3.4 m
  • High Resolution of 0.04” / 1 mm
  • -40 ˚C to 70 ˚C / -40 ˚F to 158 ˚F
  • Mounting: 1.5” NPT (6” adjustability)
  • Over 7-year battery life
  • Class I, Division 1 (Zone 0), intrinsically safe
  • 900 MHz: Up to 7500 ft (2.3 km)
  • 2.4 GHz: Up to 4.3 miles (7 km)
  • Secure AES encryption


The OleumTech® LL6 Ultrasonic Transmitter does not come in contact with the liquid (product) or have any moving parts that require maintenance. Specifically designed for water and wastewater applications, the LL6 provides 1 to 12 ft range of reliable level measurement with high resolution of 0.04 inches. The LL6 can be installed easily and quickly with the provided mounting hardware. Additional data such as volume and tank full % can be reported as well based on user preference.


The Transmitter rely on power from a replaceable battery. The system is engineered to achieve maximum battery life, providing +7 years of life from a single battery.


Designed for use in Class I, Division 1 (Zone 0) hazardous locations. The LL6 is intrinsically safe, meaning it cannot a cause a spark and can be serviced without being removed from a process.


The LL6 features a 32-character local LCD display for instantly reading process data, battery voltage, and RF strength (RSSI). When the display is set to configuration mode, users can set all of its parameters, perform calibration, and connect to a network just using the push button interface without the need of any configuration cables.


The OTC Sensor Network is managed using the BreeZ Software by OleumTech, provided free of charge. The Ultrasonic Transmitter can be configured using the push button interface or BreeZ Software.


The LL6 communicates with an OleumTech Wireless Gateway within its network, creating a highly scalable network, accommodating virtually any I/O requirement.