Open Channel Flow Meter

Measuring Discharge In Open Channel Dams

‎Measure discharge on open channel dams using JAIN Xonic X100 LM Ultrasonic Open channel flow meters using large transducers for open channels that are over 2 meters long and small transducers for smaller sites under 2 meters. The system transducer has its own design patent.‎

‎Definition of Open Channel Flow Meter‎

‎Open Channel Flow Meter is a flow meter that is applied to measure medium or large flow capacity on a channel or trench. In practice, many are also used for rivers and culverts with super large sizes.‎

‎Definition of Open Channel Flow Meter‎

‎The use of open channel flow meters in a stream with an open system and usually flow due to the force of gravity. The workings of this type of open channel flowmeter is to calculate the flow speed and surface height calculated against the cross-sectional area of the channel.‎

‎For the measurement of flow speed, ‎‎flow sensors‎‎ are used or calculate flow capacity based on delta pressure due to differences in water surface height.‎

‎So the basic principle of this ‎‎type of flow meter‎‎ is a combination of 2 types of height and speed sensors. To take measurements of the surface of the water can use a level sensor. As for the measurement of flow velocity can use magnetic flow sensor or ultrasonic flow sensor.‎

‎With the calculation of velocity the result of flow sensor installed against the cross-sectional channel area will be able to flow capacity. The flow capacity of open channel flow meters is called flow rate or flow discharge with units of volume per time.‎

‎Also Read: ‎‎Flow Meter To Measure Discharge on Open Channel‎

‎In general, this flow meter is classified on the type of ultrasonic flow meter. How this flow meter works as a way ultrasonic flow meter but combined with a level sensor. Where this level sensor can use a type of ultrasonic level or radar level.‎

‎Working Principles of‎
‎ Open Channel Flow Meter‎

‎Open channel flow meters work at several points in the flow measurement path. The liquid may be fully open to the atmosphere, or it may be contained in a closed pipe that is not filled with liquid and only opens to the atmosphere at the installation point of the flowmeter itself. Open channel flow meters use two types of height sensors and velocity or height differences.‎

Flow meters for pipes are not full
Flow Meter Ultrasonic pada Pipa Sewer” data-medium-file=”https://i2.wp.com/inaparts.com/wp-content/uploads/2018/11/Flow-Meter-Ultrasonic-aliran-Gravitasi-Pipa-Sewer-e1628450350396.jpg?fit=200%2C133&ssl=1″ data-large-file=”https://i2.wp.com/inaparts.com/wp-content/uploads/2018/11/Flow-Meter-Ultrasonic-aliran-Gravitasi-Pipa-Sewer-e1628450350396.jpg?fit=450%2C300&ssl=1″ data-recalc-dims=”1″ data-lazy-loaded=”1″> Flow Meter Ultrasonic pada Pipa Sewer

‎Basically this flow meter calculates the flow speed taking into account the height of the surface. For the measurement of flow speed can use transit time flow meter or magnetic flow meter. As for the surface height of the flow using ultrasonic level sensors. The incorporation of velocity with a cross-sectional area can result in flow rate flow capacity in the channel.‎

‎It measures not only speed but also flow sound speed to ensure it has accurate measurements. In addition, the system can compensate for temperature differences and change measurements with its own diagnostic functions.‎

Open Channel Flow Meter
Open Channel Flow Meter

‎Measure discharge on a dam using the JAIN Xonic100 LM Ultrasonic Open Channel Flowmeter using the ultrasonic transit time method for flow speed and uses a level meter to receive level data. Jain Xonic 100LM uses 4 pairs of transducers for large open channels and 2 pairs of transducers for small open channel applications.‎

‎Jain Xonic 100MC not only measures speed but also measures the speed of sound and can compensate for temperature changes with its own diagnostic functions. Jain Xonic 100LM is newly developed and has highly advanced diagnostic functions for better performance.‎

‎Measuring discharge on a dam using JAIN Xonic 100MC not only measures speed but also measures the speed of sound and can compensate for temperature changes with its own diagnostic functions. Jain Xonic 100LM is newly developed and has highly advanced diagnostic functions for better performance.‎

Open Channel flow meter
Ultrasonic flow meter open channel

‎Jain Xonic 100LM uses a new certified technology, which was recognized as the NET (New Excellent Technology) of MoST in 2007 from the Government of Korea with PATENT “Very precise time measurement method” and JAIN Xonic 100LM also uses PATENT “Transducer Design for Open Channels”. The patent is about the transducer alignment method in the middle of the field, and engineers can align one transducer to the opposite transducer very precisely with the laser pointer. Jain Xonic 100LM transducers are designed like ball types, so transducers can be aligned in all directions.‎

‎Also Read:‎‎Float Level Switch: Understanding and How It Works‎

‎Application‎

‎Jain Xonic 100LM measures flow speed directly with a patented 4-lane transducer. The transducer is located at the end of each side to prevent any obstruction, and the level is located at the top of the open channel, and its accuracy is within 1% of the actual flow.‎

‎ ‎‎ ‎‎Cross Flow‎‎ Installation‎

‎In the case of winding open channels, jain Xonic 100LM can use Cross Flow Installation to maintain better accuracy. Lines 1 &3, Lines 2 &4 can be installed as cross paths to maintain better accuracy.‎

‎Specifications‎

  • Principle: Anti-Round Mode, Transit-Time With Cross-Correlation, Fast Fourier Transform
  • Measuring Path: 2 or 4 path
  • Measuring Width: 20 meters
  • Accuracy: 1%
  • Sensitivity : 0.003 m/s
  • Data Output : 4-20mADC, Relay
    RS-232C / RS-485
  • Data Input : 4-20mADC
  • ‎Data logger: 4Mbytes‎
  • Display: Large Color LCD (128×64)
  • Temperature Range
    • Electronics : -20 to +60℃
    • Transducer: -40 to +120℃
  • Power: 110~220VAC, free voltage
  • Enclosure
    • Electronics: NEMA 4 (IP65)
    • Transducer: Submersible (IP68)

‎Also read:‎‎How to measure water discharge with clamp-on flow meter‎

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