Wireless Time-of-Flight Flowmeter

Water levels, flow velocities, and discharge rates play a crucial role in the application of reservoirs for water storage, regulation of river runoff, flood control, irrigation, and water supply.

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LSH10-1QM Wireless Time-of-Flight Ultrasonic Flow Meter (Large Range)

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Product details

I. Product Overview
The wireless time-of-flight ultrasonic flowmeter consists of a host unit and slave units that operate in synchronous fashion on both banks. In water bodies where cable installation is not feasible, the wireless system represents an ideal solution for flow measurement over large expanses of water. The host unit can be flexibly configured to accommodate multiple slave units, enabling the construction of single-layer, multi-layer, or cross-layer acoustic path systems.
II. Technical Highlights
1. Extremely shallow water depth measurement: The transducer’s minimum measurable water depth is less than 0.1 m; as long as the water level covers the transducer, it can operate normally.
2. Virtually no blind spots: Based on the ultrasonic time-of-flight principle, the measurement covers the entire cross-section in laminar flow, eliminating any flow-measurement blind zones.
3. Very low-flow rivers: Timing accuracy is at the n S level, and the minimum measurable flow rate is as low as 0.001 m/s.
4. Watersheds with high sediment content: Suitable for use in polluted waters, wastewater, and water bodies with high sediment concentrations; intelligent drive ensures signal strength.
5. Extremely wide measurement section: The maximum measurement width can reach 2000 m, making it suitable for various expansive river surfaces.
6. Simple installation method: No need to erect or pre-bury cables across the river; does not interfere with vessel navigation, and requires minimal maintenance afterward.
7. High measurement accuracy: Multi-layer flow velocity measurement and flow integration algorithm ensure high measurement accuracy.
III. Technical Parameters
1. Measurement Principle: Wireless Time Difference Method
2. River channel width: Less than 2000 m
3. System Configuration: Deploy slave units along both sides of the river channel, and place the master unit in either the machine room or on the river channel side. The master-slave system is connected via a wireless link.
4. Accuracy: 1%
5. Host display: 7-inch color touchscreen, Chinese language, with backlight
6. Power supply voltage: 10–26 VDC
7. Power: The system operates continuously at <10W.
8. Installation method: Wall-mounted
9. Protection rating: IP67
10. Housing material: PC
11. Operating temperature: -20～70℃
12. Measurement units: M/S, M³, °C, M
13. Data transmission: NB/CAT1/5G optional
14. Data Recording: 16G SD card, with a recording cycle exceeding 10 years.
15. Interfaces: 4 RS485 ports, 1 RS232 port, 4 analog input channels, 2 analog output channels, and 2 digital output channels.
16. Software: A real-time operating system based on FreeRTOS
17. Alarm Management: A multi-level alarm system is implemented.
18. Communication Protocol: Standard MODBUS

4. Wireless Time Difference of Arrival Sensor
1. Frequency: 200 kHz (river width < 150 m) / 90 kHz (river width < 40 m) / 28 kHz (river width < 1000 m)
2. Operating temperature: -40～80℃
3. Protection Rating: IP68
4. Sensor material: PVC/stainless steel
5. Working pressure: Less than 1 MPa
6. Cable length: Standard configuration is 20m; other lengths can be customized.