Ultrasonic Level Sensors

    Non-contact time-of-flight ultrasonic measurement for cost-effective level monitoring in open tanks, basins, and silos

    ±2 mm Accuracy15 m RangeNon-ContactTemperature Compensated

    Prosonic FMU9x Product Family

    Reliable ultrasonic sensors with advanced echo processing for every application

    Prosonic FMU9x Series

    Time-of-Flight Ultrasonic Technology

    Non-contact ultrasonic level measurement for liquids and bulk solids in open vessels with temperature compensation and advanced echo processing

    Prosonic FMU90

    Compact ultrasonic sensor for simple level monitoring applications

    Accuracy: ±2 mm

    View Details
    Key Features
    • Time-of-flight measurement principle
    • Automatic temperature compensation
    • PVDF transducer material
    • Easy envelope curve setup
    Technical Specifications
    Measuring Range:
    Up to 5 m liquids / 2 m solids
    Temperature Range:
    -40°C to +80°C
    Pressure Rating:
    -0.2 to 2 bar
    Beam Angle:
    12° at 3 dB

    Prosonic FMU95

    Advanced ultrasonic with enhanced diagnostics and longer range

    Accuracy: ±2 mm

    View Details
    Key Features
    • Advanced echo processing algorithms
    • Self-cleaning transducer face
    • Heartbeat Technology verification
    • Multi-echo evaluation
    Technical Specifications
    Measuring Range:
    Up to 15 m liquids / 7 m solids
    Temperature Range:
    -40°C to +80°C
    Process Connection:
    G 1½", 1½" NPT
    Communication:
    4-20 mA, HART

    Prosonic FDU9x

    Four-wire ultrasonic sensors for challenging conditions

    Accuracy: ±4 mm

    View Details
    Key Features
    • Separate transmitter design
    • Extended temperature range
    • Chemical-resistant materials
    • False echo suppression
    Technical Specifications
    Measuring Range:
    Up to 10 m
    Temperature Range:
    -40°C to +100°C
    Housing Material:
    PP, PVDF, or PTFE
    Protection:
    IP68 / NEMA 6P

    Common Applications

    Cost-effective ultrasonic measurement for standard level monitoring applications

    Open Basins & Tanks

    Cost-effective level monitoring in water treatment plants and storage tanks

    Bulk Solids Silos

    Non-contact measurement of grain, cement, and other dry materials

    Simple Level Monitoring

    Basic level indication and pump control in non-critical applications

    Flow Measurement

    Open channel flow monitoring in flumes and weirs

    Ultrasonic Technology Benefits

    Why Prosonic ultrasonic sensors are the smart choice for basic level applications

    Non-contact measurement eliminates product contamination and wear

    Automatic temperature compensation ensures accuracy in varying conditions

    Self-cleaning transducer face reduces maintenance requirements

    Simple installation without tank modifications or emptying

    Cost-effective solution for basic level monitoring applications

    Unaffected by changing product properties like density or conductivity

    Application Considerations

    Ultrasonic sensors may not be suitable for applications with heavy foam, vapor, dust, or extreme turbulence. For these challenging conditions, consider our radar or guided wave radar solutions.

    Simplify Your Level Measurement

    Discover cost-effective ultrasonic solutions for your level monitoring needs