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OTT PLS – Pressure Level Sensor

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OTT PLS – Pressure Level Sensor

    • The robust ceramic pressure cell offers industry-leading accuracy and does not deform over time like membrane technology, providing long-term measurement stability
    • Rugged design: Ceramic pressure cell resistant to physical force (5 x burst pressure) and enclosure made of high-quality saltwater resistant steel for use in coastal environments
    • Built-in microcontroller – compensates for temperature effects and applies correction values for gravitational acceleration and water density
    • Vented pressure probe, automatically compensates for changes in barometric pressure
    • Robust cable with Kevlar core for length stabilization and capillary tube for venting
    • Simple setup and connection to external dataloggers using SDI-12 or 4 … 20 mA interfaces
    • Optimized resolution is achieved by assigning the 4 … 20 mA to that part of the measuring range that is actually required
    • Water temperature output in addition to water level (for SDI-12 output)

    Measuring water level in surface and groundwater, including:

    • Stations with sloping bottom, e.g. water banks
    • Small diameter pipes or holes (from 1″ Ø)
    • Dams, weirs, irrigation systems
    • Waterways that occasionally ice over
    • Brackish water, saltwater
    • Waterways that do not contain water throughout the year (e.g. retaining basins)

    Water level measurement  
    Measurement range 0 … 4 m, 10 m, 20 m, 40 m, 100 m
    Accuracy  
     SDI-12 ±0.05 % FS (linearity and hysteresis)
     4 … 20 mA ±0.1 % FS (linearity and hysteresis) 10 ppm/°C at 20 °C
    Resolution (SDI-12) 0.001 m; 0.1 cm; 0.01 ft; 0.1 mbar; 0.001 psi
    Temperature compensated working range  -5 °C … +45 °C (ice-free)
    Temperature measurement range –-25 °C … +70 °C (ice-free)
    Resolution 0.1 °C / 0.1 °F
    Accuracy ±0.5 °C / ±0.9 °F
    Electrical data  
    Available interfaces (use as required) 4 … 20 mA, SDI-12, RS485 (via SDI-12 protocol)
    Supply voltage +9.6 … +28 V DC, typically 12/24 V DC
    Power consumption (SDI-12)  
    Sleep  
    Active  
    Pressure sensor (capacitive pressure sensor) ceramic, temperature compensated, overload safe for up to 5 times the measuring range without permanent mechanical damage
    Temperature sensor NTC
    Dimensions 195 mm x 22 mm
    Weight approx. 0.3 kg
    Environmental conditions  
    Operating temperature –-25 … +70 °C
    Storage temperature –-40 … +85 °C
    Materials  
    Housing stainless steel 1.4539 (904L) resistant to sea water
    Seals Viton
    Cable jacket PUR
    Protection type IP68
    Mechanical Strength meets the mechanical shock tests of IEC 68-2-32
    EMC limits CE conformity; EN 61000-4-2/3/4/5/6 and EN 61000-6-3 Class B are adhered to

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