Open-Channel Time-Difference Ultrasonic Flowmeter (15m–25m)

It can be widely used for flow measurement, including flow rate, water level, instantaneous flow, and cumulative flow measurement in applications such as sewage treatment inflow and outflow channels, chemical liquid pipelines in industrial and mining enterprises, wastewater discharge channels, hydraulic engineering projects, agricultural irrigation channels, and flood discharge gates.

Classification:

LSH10-1QM Time-Difference Ultrasonic Open-Channel Flow Meter (Wired Transmission), 200 kHz (River Width < 25 m, Medium Range)

Keyword:

超声波流量计

超声波明渠流量计

时差法超声波流量计

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Product details

I. Introduction to the Instrument
The ultrasonic open-channel flowmeter measures the travel time of ultrasonic waves using a high-precision time-to-digital conversion chip, effectively overcoming issues such as zero-drift and large measurement errors at low flow rates. It comprehensively integrates the frequency difference method and the time difference method, employing real-time sound velocity and temperature compensation technologies to accurately compensate for flow rate variations. The human-machine interface features a rich graphical display and supports multiple communication protocols. This flowmeter boasts advantages including high measurement accuracy, simple operation, and stable performance.
II. Performance Characteristics
1. Supports multi-channel measurement, effectively enhancing the instrument’s accuracy and reliability in complex fluid conditions.
2. It comprehensively employs both frequency-difference and time-difference measurement techniques, with automatic sound velocity compensation, effectively avoiding zero-point drift and enhancing the accuracy of small-flow measurements.
3. Supports RS485 communication, making integration with remote data management systems even more convenient.
4. Supports input methods such as AC 220V, DC 14V, and solar power;
5. When the cross-section of the flow is large, use multi-channel velocity measurement to achieve high-precision measurements.
6. No flow obstruction, no head loss.
7. Use an ultrasonic level gauge to avoid the common issue of conventional pressure sensors freezing and malfunctioning at low temperatures, which can lead to inaccurate data readings and compromise system stability.
III. Feature Introduction
1. Wall-mounted host with a large LCD display for data presentation.
2. Comes with an ultrasonic level meter; a pressure-type level meter is also available. The 485 input can be connected to the host device.
3. Implement output of flow velocity, water level, instantaneous flow rate, and cumulative flow rate.
IV. Technical Parameters
(1) Host Parameters
1. Host display: OLED LCD screen display, keyboard input
2. Power supply: DC 12V
3. Displayed data: Water level, flow velocity, instantaneous flow rate, cumulative flow rate
4. Output interface: RS485
5. Protection rating: IP65
6. Installation method: Wall-mounted
7. Host interface: Provides an external water level gauge interface.
(2) Time-Difference Method Ultrasonic Sensor
1. Measurement Principle: Continuous measurement using the time-difference method
2. Transducer frequency: 200 kHz
3. Measurement channels: 1–24 channels
4. Measurement accuracy: 5.0%
5. Flow velocity range: 0.01–30 m/s
6. Channel width: 15m–25m
7. Sensor protection rating: IP68
(3) Ultrasonic Water Level Sensor
1. Water level range: 0-10 m
2. Water level accuracy: 1.0%
3. Resolution: 1 mm
(4) Other parameters
1. Ambient temperature: -20℃ to 70℃
2. Operating temperature: -20℃ to 70℃