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    Open Channel Flow Meter for Water, Non Contact

    $437.38
    Buy an affordable open channel flow meter for non-contact measurement of water flow. Ultrasonic open channel flow meter with LCD display, measurement range of 0.1m³/s~10m³/s, accuracy of 0.3%, and can also be used with the corresponding Parshall flume. Open channel smart flow meters are widely used in various fields such as petroleum, chemical industry, energy, food, environmental protection, water conservancy and so on.
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    SKU: ATO-FLOW-MQ
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    The open channel flow meter for water is used with the corresponding Parshall flume to measure the liquid level using the propagation law in the air, and continuously transmit the liquid level information to the host. The host automatically measures the instantaneous flow and cumulative flow through the calculation system and stores it. The ultrasonic open channel flow meter uses a professional dustproof and waterproof shell, which is corrosion-resistant and moisture-proof, and can be installed outdoors for long-term use.

    Specification

    Model ATO-MEX-MQ
    Measuring Range 0.1m³/s~10m³/s
    Cumulative Flow 99999999m³
    Measurement Range 0~3m
    Measurement Accuracy 0.3%
    Flow Rate Accuracy 1% (depending on the type of weir plate)
    Blind Area 0.3m~0.5m
    Measurement Resolution 1mm
    Range Ratio 1:100
    Pressure Normal pressure
    Instrument Display Built-in LCD displays instantaneous flow and cumulative flow
    Output Signal 4-20mA, RS485 Modbus protocol, wireless remote transmission (optional)
    Power Supply Voltage DC24V/AC220V, built-in lightning protection device
    Ambient Temperature -20℃~+60℃
    Protection Level IP65
    Installation Method External clamp type


    Dimension (Unit: mm)

    Open channel flow meter dimension

    Parshall flume dimension

    Symbol explanation: B is the throat width, B1 is the water inlet channel width, B2 is the water outlet channel width, L is the throat length, L1 is the contraction section, and L2 is the diffusion section.

    Weir construction and use conditions: B>=B, H/P<2.5, H>0.03M, P>0.1M

    Category Parshall Flume Throat Segment Inlet Section Outlet Section Wall Height
    B L X Y N B1 L1 LA B2 L2 K D
    Small No.1 25 76 8 19 29 167 356 242 93 203 19 229
    No.2 51 114 16 22 43 214 406 276 135 254 22 254
    No.3 76 152 25 25 57 259 457 311 178 305 25 457
    No.4 152 305 50 75 114 400 610 415 394 610 76 610
    No.5 228 305 50 75 114 575 864 587 381 457 76 762


    Parshall Flume Selection

    Parshall Flume (304 material) Thickness (mm) Dimensions (mm) Flow (m³/h)
    No.1 1.5 B=25, length, width and height 635*267*265 19.44
    No.2 1.5 B=51, length, width and height 774*314*305 47.52
    No.3 1.5 B=76, length, width and height 914*359*517 115.56
    No.4 1.5 B=152, length, width and height 1525*500*730 339.6
    No.5 1.5 B=228, length, width and height 1630*665*890 900


    Applications

    Application of open channel flow meter 

    Tips: FAQ of the flow meter

    • Large measurement error: Common reasons for large measurement error of flow meter include improper installation, medium change, wrong parameter setting and sensor aging. Solutions include ensuring sufficient straight pipe section, adding a bubble separator or filter, recalibrating parameters, and regularly maintaining sensors to improve measurement accuracy.
    • No signal or unstable signal: No signal or unstable signal may be caused by a power supply problem, wiring failure, electromagnetic interference or medium not meeting requirements. The solution is to check the power supply and grounding, use shielded cable to reduce interference, avoid strong electromagnetic field equipment, and ensure that the physical properties of the medium meet the working conditions of the flow meter.
    • Large reading fluctuation: Reading fluctuation is usually caused by abnormal flow state, sensor failure or signal processing problem. The measurement data can be stabilized by increasing the damping time to smooth the signal, improving the pipeline flow state or cleaning the sensor surface (such as removing condensation or dirt).
    • Communication failure: Communication failure is usually caused by protocol mismatch (such as MODBUS address error), the RS485 line is too long or the terminal resistor is not connected. Solutions include checking the communication protocol and baud rate settings, shortening the communication line distance, and adding a 120Ω terminal resistor at the end of the bus to ensure stable signal transmission.
    • Poor environmental adaptability: The flow meter may fail in extreme temperature environments, such as high temperature causing damage to electronic components or low temperature causing icing. Solutions include choosing a high protection level (IP68) or a split design (high high-temperature occasions), and adding insulation or heating devices in cold environments to ensure normal operation of the equipment.
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