Box-type time-difference flowmeter

Box-type time-difference flowmeters are widely used in various fluid flow monitoring applications, including: hydraulic engineering—used for monitoring the flow rates of rivers, irrigation canals, and other waterways; agricultural irrigation—monitoring the flow rates in agricultural irrigation channels; and open-channel waterways—monitoring river flow rates to support water resource management and scheduling.

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LSH10-1QM Time-Difference Ultrasonic Flowmeter (Box Culvert Type)

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Product details

I. Product Introduction
The time-difference flowmeter of the box type is a device that uses ultrasonic technology to measure fluid flow rates. It primarily calculates the flow rate by measuring the time difference of ultrasonic wave propagation through the fluid. Its operating principle is based on the time-difference method: multiple sets of ultrasonic transducers are installed in layers on both sides of the fluid channel. By detecting the time difference between the propagation of ultrasonic waves downstream and upstream, the device determines the water’s flow velocity and subsequently calculates the flow rate.

II. Working Principle

1. Ultrasonic transducers: Multi-layer time-difference flowmeters employ multiple sets of ultrasonic transducers installed in layers on both sides of the fluid channel.
2. Time-difference measurement: The controller sequentially controls the ultrasonic transducers on each floor to alternately transmit and receive ultrasonic waves in opposite directions, thereby detecting the time difference between the propagation of ultrasonic waves downstream and upstream in water.
3. Flow Velocity Calculation: Based on the time difference and the speed of ultrasound propagation in water, calculate the flow velocity for each layer. Then, using the liquid level measured by the level sensor and the inherent dimensions of the tank, determine the cross-sectional area of the flow passage, and finally compute the flow rate.

3. Application Scenarios
Box-type time-difference flowmeters are widely used in various fluid flow monitoring applications, including: hydraulic engineering—used for monitoring the flow rates of rivers, irrigation canals, and other waterways; agricultural irrigation—monitoring the flow rates in agricultural irrigation channels; and open-channel waterways—monitoring river flow rates to support water resource management and scheduling.

IV. Technical Features

1. Intelligence: Integrates sensors and data processing technologies to enable remote monitoring and automated measurement.
2. High Precision: By optimizing algorithms and hardware design, we enhance the accuracy and stability of measurements.
3. Versatility: Supports measurements across a wide range of fluid types and in complex environments, demonstrating strong adaptability.
4. Easy maintenance: The design emphasizes ease of installation and maintenance, reducing users’ costs and time spent on operation.

V. Technical Parameters

1. Box-type ultrasonic open-channel flowmeter: (800×800, 16 channels) / (1200×1200, 24 channels) / (500×500, 12 channels) / (1200×1200, 24 channels) / Custom sizes available
2. Transducer arrangement: Cross arrangement
3. Accuracy Class: Grade 3
4. Measurement accuracy: ±3% for a full tank; ±5% for a non-full tank.
5. Flow velocity range with accuracy guarantee: (0.1–3) m/s
6. Calibration method: Actual flow calibration before leaving the factory;
7. Sampling frequency: 8 Hz;
8. Level measurement: Electronic water level gauge
9. Level accuracy: 2.5 mm;
10. Supply voltage: DC9-30V;
11. Communication: RS485 Modbus protocol
12. Power consumption ≤ 2W (including water level gauge);
13. Mechanical material: High-strength stainless steel;
14. Protection rating: IP68;