DGADS Ultrasonic Doppler Flow Meter

The product utilizes the Doppler effect principle of underwater ultrasonic acoustics for measurement. The sensor emits a continuous, fixed-frequency ultrasonic signal directly forward into the water body and simultaneously receives the sound waves reflected back by acoustic scatterers moving with the water flow—such as micro-particles, air bubbles, or impurities. By analyzing the frequency shift in these reflected waves, the device calculates the velocity of the moving water and then applies vector correction to determine the accurate flow speed. Meanwhile, the pressure-sensitive element at the bottom of the sensor detects changes in water pressure, providing a reliable water-level signal. Combined with pre-set parameters specifying the dimensions of the channel (e.g., waterway or pipeline), the system can accurately compute the cross-sectional area through which water flows, ultimately yielding precise flow-rate data. Additionally, users can opt to integrate a conductivity sensor, enabling real-time monitoring of water quality parameters as well.

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Urban Underground Pipeline Monitoring Instrument

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产品描述

- Commodity name: DGADS Ultrasonic Doppler Flow Meter
Measurement Principle

The product utilizes the Doppler effect principle of underwater ultrasonic acoustics for measurement. The sensor emits a continuous, fixed-frequency ultrasonic signal directly forward into the water body and simultaneously receives the sound waves reflected back by acoustic scatterers moving along with the water flow—such as micro-particles, air bubbles, or impurities. By analyzing the frequency deviation of these reflected waves, the sensor calculates the velocity of movement, which is then vector-corrected to determine the actual water flow speed. Meanwhile, the pressure-sensitive element at the bottom of the sensor detects changes in water pressure, providing a reliable water-level signal. Combining this data with pre-set parameters defining the channel's (waterway or pipeline) dimensions allows for the calculation of the cross-sectional area through which water flows, ultimately yielding accurate flow-rate measurements. Additionally, users can opt to integrate a conductivity sensor, enabling real-time monitoring of water quality parameters as well.

Key Features

Measurement parameters: flow velocity, water level, flow rate, cross-sectional area of flow, water temperature, cumulative flow, signal strength
Unidirectional Flow (Standard Model): Does not distinguish between forward and reverse flow; output is given as an absolute value. 0~| ±10 m/s
Bidirectional Flow (Bidirectional Model): Detects forward and reverse flow, outputs values with positive and negative signs, ranging from -10 to 10 m/s
Alloy plastic casing
Integrated conductivity sensor (optional)
Bottom-mounted hydrostatic level sensor (with built-in flow velocity-dynamic pressure compensation)
Compact in size, with a streamlined design

Application scenarios

Hydrological, hydraulic, environmental protection, and municipal measurements of flow velocity and discharge in rivers, canals, and other waterways; manhole flow velocity and discharge measurements; agricultural irrigation flow measurements; intake point flow measurements; effluent outlet flow measurements; and non-full-pipe flow measurements for laboratory facilities.

Technical Specifications

Flow velocity accuracy: 1% ± 0.005 m/s
Flow velocity resolution: 0.001 m/s
Dead-zone velocity: Unidirectional flow type: | 0~0.003 | m/s, bidirectional flow model: -0.006 m/s to 0 to +0.006 m/s
Water level range: 0–10 m, customizable
Water level accuracy: 0.2% ± FS0.001m
Water level resolution: 0.001 m
Electrical Conductivity Range/Accuracy: 0 ~ 10,000 mS/cm/2%
Water temperature range/accuracy: 0~60.0℃ / 0.5℃
Water temperature resolution: 0.1℃
Power supply: 6–26 VDC, typical value: 12 VDC
Output: RS485.MODBUS RTU
Output damping: Smooth (flow rate/flow): Intelligent algorithm; Intermittent (flow rate/flow): 10 seconds; Inversion (flow rate/flow): 0.02 seconds
Ultrasound sensor: Single-point, single-beam, 2 MHz, 5° oblique angle
Power Consumption: High-Performance Mode: Unidirectional Flow Model (55±5 mA, measured 5 times per second), Bidirectional Flow Model (60±5 mA, measured 2 times per second); Low-Power ECO Mode (measured 5 times every 5 seconds): Unidirectional Flow Model (20±2 mA), Bidirectional Flow Model (30±2 mA); Customizable
Base configurations: rectangular, circular, trapezoidal, elliptical, U-shaped, and other custom options