The SITRANS Probe LU240 is ideal for level monitoring in the water and wastewater industry, chemical storage vessels, and
small bulk hoppers.
The range of SITRANS Probe LU240 is 6 or 12 m (20 or 40 ft).
Using Process Intelligence, Auto False Echo Suppression for
fixed obstruction avoidance, and accuracy of 0.15 % of range or
6 mm (0.25 inch), the Probe LU240 provides unmatched reliability.
The Probe LU240 offers HART communication.
The transducer on the Probe LU240 is available as ETFE or
PVDF to suit the chemical conditions of your application. As well,
for applications with varying material and process temperatures,
the Probe LU240 incorporates an internal temperature sensor to
compensate for temperature changes.
• Key Applications: chemical storage vessels, filter beds, liquid
storage vessels
Parameter Description
Device Type Non-contact Ultrasonic Level Transmitter
Measured Variable Level, Distance, or Volume
Measuring Principle Time-of-Flight (TOF) of ultrasonic pulses reflected from the surface
Applications Liquids (water, wastewater, chemicals), slurries, and some solids (grains, powders)
Mounting Type Top-mounted (tank, pit, open channel)
Non-contact measurement — no moving parts, minimal maintenance
Built-in temperature compensation for stable readings
Configurable outputs (4–20 mA, relay, RS485 Modbus)
User-friendly interface (local buttons or digital setup via HART/PC)
Tank linearization for volume measurement
Open-channel flow measurement (with programmable weir/flume equations)
* Water & wastewater level monitoring (tanks, reservoirs, wells)
* Chemical tanks and corrosive liquid measurement (using PVDF sensor)
* Open channel flow metering
* Solids (grain, cement, coal) level monitoring
* Pump control and overfill protection
