Portable Open Channel Flow Meter | Portable Open Channel Flow Meter under HJ 354-2019 Standard

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1. Portable open channel flowmeter

Portable open channel flowmeter is a high-precision flow velocity and flow detection instrument that uses ultrasonic detection technology and is suitable for working conditions such as rivers, open channels, and pipelines. It has the characteristics of good stability, low environmental impact, and low maintenance frequency. It is widely used in coastal cities, river chief management, inland river monitoring and other scenarios. The main feature is high measurement accuracy: using ultrasonic detection technology, it can accurately capture flow rate and liquid level information, ensuring the reliability of measurement results. For example, in open channel flow measurement, its accuracy can meet the strict requirements of environmental monitoring and engineering management. Good stability: The design without rotating parts reduces mechanical wear and measurement errors caused by component aging, and can maintain stable performance even after long-term use. Less affected by environmental factors: Ultrasonic technology has strong adaptability to environmental changes such as temperature and humidity, and can work normally under complex working conditions, such as sediment and floating objects in natural rivers, without significantly interfering with measurements. Low maintenance frequency of Lu Qingnian: Due to the absence of mechanical rotating parts, there is less need for daily maintenance, and only regular cleaning of the sensor surface is required, reducing the cost of use. High work reliability: Combined with static pressure liquid level measurement and environmental temperature correction functions, it further enhances the reliability of the instrument under extreme working

conditions. Application scenario: Sponge city: used to monitor the flow of rainwater discharge systems, evaluate urban drainage capacity, and provide data support for sponge city construction. River chief system management: helps river chiefs real-time grasp changes in river flow, assists in formulating governance plans, and improves water resource management efficiency. Inland River Monitoring: Long term monitoring of flow velocity and volume in inland waterways to ensure shipping safety and optimize water resource scheduling. Natural rivers: Measuring river flow in outdoor environments to provide scientific basis for ecological protection, flood control and disaster reduction. Open channels and pipelines: suitable for flow monitoring in agricultural irrigation channels, urban sewage pipelines, and other scenarios, to assist in the rational utilization of water resources. Aquaculture industry: Monitor the water exchange capacity of aquaculture ponds, maintain stable water quality, and improve aquaculture efficiency. Working principle of flow velocity measurement: By emitting and receiving ultrasonic waves, a mathematical relationship is established between frequency difference (Doppler effect) and flow velocity to calculate the fluids velocity. Liquid level measurement: The time difference between ultrasonic transmission and reception is directly proportional to the liquid level height, and the instrument obtains the liquid level value by processing the time difference signal. For working conditions that require measuring a large liquid level range, static pressure level sensors can be combined to improve accuracy. Temperature correction: Environmental temperature can affect the propagation speed of ultrasonic waves. T

Portable Open Channel Flow Meter | Portable Open Channel Flow Meter under HJ 354-2019 Standard

1. Portable open channel flowmeter

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