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Water flow

Accurate flow and discharge measurement has been a core competency of OTT Hydromet since we created our first flow meter in 1875. Choose from a variety of either portable or stationary measurement options using different measurement technologies, including mechanical, acoustic, Doppler, and more.

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        OTT Cable Way Systems

        Stationary systems for vertical based discharge measurements

        The rugged stationary cable way systems made by OTT provide safety in vertical method based discharge measurement. They are type-tested and designed for long-term dependable operation at rivers or canals.

        • Fixed installation
        • Maintenance-free cable way system for span lengths of up to 160 m. All components are maintenance free. Oil-free gas pressure spring tensioner for span lengths of above 20 m. Electrical or optionally mechanical double-drum winch.
        • Vertical method based discharge measurements
        • Rivers and canals

        OTT SVR 100

        Surface Velocity Radar for Measuring Open Channel Flow

        OTT SVR 100 is a simple, non-contact, compact surface water velocity radar sensor. Designed for measuring flow in open channels and rivers where reliable velocity data is required continuously, during floods or periods of high concentrations of suspended sediments.

        • Fixed installation
        • Identify data influenced by sensor movement (e.g., wind, traffic) using meta data from integrated vibration and tilt sensors
        • Non-contact surface velocity radar
        • No
        • 0.08 ... 15 m/s (0.26 … 49 ft./s)

        OTT SLD - Side Looking Doppler Sensor

        Water flow meter for longterm data collection of velocity and discharge measurements

        The OTT SLD uses acoustic Doppler technology for continuous measurement of water velocity and level in streams, rivers, and canals.

        • Fixed installation
        • Acoustic
        • Flow velocity
        • Side-Looking-Doppler for continuous discharge measurement in rivers and open channels. Discharge calculation based on velocity - index - method. Integrated vessel filter algorithm, Modbus interface and output of total volume of flow (max. interval 1 day).
        • ± 10 m/s
        • ± 1 % of measured value ± 0.5 cm/s

        OTT MF pro - Water Flow Meter

        Handheld electromagnetic water flow meter with automatic discharge calculation

        The OTT MF Pro is a user-friendly, low maintenance electromagnetic current meter for cost-efficient in-stream discharge measurement.

        • Spot
        • Electro-magnetic
        • Flow velocity and water depth
        • Low maintenance magnetic - inductive probe with level measurement for reliable flow measurements. Works well in low flow and turbulent conditions, cross - sections with weed growth and pollution. Applicable in streams and conduits.
        • 0 … 6 m/s
        • ± 2% of measured value ± 0.015 m/s ( 0 … 3 m/s ) and ± 4% of measured value ± 0.015 m/s ( 3 … 5 m/s )

        OTT C31

        OTT C31 Universal Current Meter for discharge measurements

        OTT C31 Universal current meter for flow velocity measurement in rivers and open waterways. Rod-mounted or as cable-suspended current meter from a bridge, boat or on cable ways.

        • Spot
        • Mechanical
        • Flow velocity
        • C31 - the original. Taditional hydrometric current meter with proved quality for use with wading rods, from bridges and at cable-way installations
        • 0.025 ... 10 m/s
        • ± 2%

        OTT C2

        Small - Mini Current meter for discharge measurements OTT C"

        The OTT C2 small current meter for discharge measurements for shallow waters in small rivers, channels, laboratories and river models.

        • Spot
        • Mechanical
        • Flow velocity
        • OTT C2 - the original for wading rod measurements in shallow streams, applicable from 4 cm water depth.
        • 0.025 ... 5 m/s
        • ± 2%