Product overview
The Siemens SITRANS Probe LU240 is a compact ultrasonic transmitter for continuous, non-contact measurement of liquids, slurries and bulk materials.
It can calculate level, volume and open-channel flow, making it suitable for marine tanks, wastewater systems, pump wells and industrial storage vessels.
Key features
- Non-contact ultrasonic measurement
- Measurement range up to 12 metres
- Suitable for liquids, slurries and bulk materials
- Two-wire, loop-powered operation
- 4–20 mA with HART communication
- Local graphical display
- Advanced Process Intelligence echo processing
- Automatic false-echo suppression
- Built-in temperature compensation
- Simple quick-start commissioning
- No moving components
- Low maintenance requirement
- Hazardous-area versions available
- Rugged, fully submersible sensor enclosure
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Ultrasonic time-of-flight |
| Measurement functions | Level, volume and open-channel flow |
| Maximum measuring range | Up to 12 m |
| Output | 4–20 mA |
| Communication | HART |
| Wiring | Two-wire loop powered |
| Supply voltage | Approximately 10–30 V DC, configuration dependent |
| Process connection | 2-inch NPT, BSPT or BSPP options |
| Wetted sensor material | ETFE or PVDF, depending configuration |
| Enclosure material | PBT/PC |
| Protection rating | IP66/IP68, Type 4X/Type 6 |
| Cable entries | M20 or ½-inch NPT options |
| Display | Removable local graphical HMI |
| Hazardous-area options | FM, CSA and other regional approvals |
Marine and industrial applications
- Ballast and freshwater tanks
- Bilge and sludge tanks
- Wastewater holding tanks
- Pump wells and sumps
- Sewage-treatment systems
- Cooling-water storage tanks
- Chemical tanks
- Open channels and weirs
- Industrial storage vessels
- Dry bulk-material bins
- Offshore utility systems
