Radar Flowmeter

The radar flow meter, as a kind of water level meter and flow velocity with microwave technology, is combined with the measuring technologies by mature radar water level meter and radar velocimeter, which is mainly applied to the measurement for water level and flow velocity of open channels, such as river, reservoir gate, pipe network of subterranean river course and irrigation channel.

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This product can effectively monitor the change status of water level, velocity and flow, so as to provide accurate flow information for the monitoring unit.

Advantages 

1. Built-in imported 24GHz radar flow meter, 26GHz radar liquid level gauge, CW plane microstrip array antenna radar, non-contact detection, the two-in-one product can realize the measurement of flow rate, water level, instantaneous flow and cumulative flow.

2. All-weather, high-frequency microwave ranging technology can realize online automatic monitoring, unattended.

3. The antenna transmission frequency is flexible and adjustable, and the anti-interference ability is strong.

4. A variety of data communication interfaces RS-232 / RS-485 can be set, which is convenient for users to connect to the system.

5. The construction and installation are simple, the measurement operation is combined with the sleep mode (about 300mA during normal operation, and the sleep mode is less than 1mA), which saves energy and reduces consumption, and is economical and applicable.

6. The non-contact meter does not destroy the flow state of the water and ensures the accurate measurement data.

7. IP67 protection grade, not affected by climate, temperature, humidity, wind, sediment and floating objects, and suitable for high flow rate environment during flood period.

8. Anti-condensation, waterproof and lightning protection design, suitable for various outdoor environments.

9. Small appearance, convenient installation and easy maintenance.

10. Domestic brands with independent intellectual property rights, localized service response support.

11. The core components have the test report of "Huadong Testing Center for Hydrological Instruments".

Technical Data

1.1 Working Condition Parameters 

Parameter

Description

Supply Voltage

DC 7 &#; 24V

Current(12V Power Supply)

About 300mA in normal operation, and less than 1mA in sleep mode.

Working Temperature

-35&#; &#; 70&#;

Protection Class

IP67

Emission Frequency

24.000 &#; 24.250GHz

Communication Interface

RS-232 / RS-485

Communication Protocol 

MODBUS-RTU / Customized Protocol / SZY206- "Water Resources Monitoring Data Transmission Protocol" 

1.2 Measurement Parameters 

Parameter

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Description

Velocity Range

0.15 &#; 15m/s

Velocity Accuracy

±1% FS, ±2.5% of reading

Velocity Resolution

0.01m/s

Distance Range

1.5 &#; 40m

Distance Accuracy

±1cm

Distance Resolution

1mm

Antenna Beam Angle

Flow Velocity&#;14 x 32&#; 
Water level&#;11 x 11&#;

Interval Time 

1 &#; min

1.3 Appearance Parameters

Parameter

Description

flow meter Size ( LxWxH)

302×150×156mm

Support Size ( LxWxH)

100×100×100mm

Weight 

flow meter + support&#;   5.8kg

Housing Material

Galvanized, stainless steel sheet

In terms of working principle, radar level meters usually use pulse wave or frequency modulated continuous wave technology. Pulse wave technology determines the distance by sending short microwave pulses and measuring their round-trip time. 

Frequency modulated continuous wave technology sends microwaves with varying frequencies and calculates the distance by evaluating the frequency changes of reflected waves. These methods ensure accurate measurement even in the presence of steam, dust or low dielectric constant media. 

Radar flow meters mostly use the principle of Doppler effect, that is, flow velocity information is obtained by measuring the frequency changes of reflected signals. When radar waves encounter moving fluid particles, the reflected waves will experience a frequency shift, which is proportional to the fluid velocity. 

Using this principle, radar flow meters can accurately measure the velocity of the fluid, and this method is insensitive to changes in the composition and density of the fluid. In terms of structural design, radar level meters are usually designed to be top-mounted, which can be directly installed on the top of the storage tank or installed through a waveguide. 

This installation method helps to maintain the cleanliness of the equipment and reduce the impact of environmental factors. Radar flow meters may be installed in an insertable manner, directly inserted into the fluid for measurement, or in a non-contact manner, such as fixed to the outside of the pipe to monitor the fluid. 

In practical applications, choosing the right equipment has a significant impact on improving production efficiency and cost control. For example, in the application of urban drainage systems, radar level meters can be used to monitor water levels to prevent overflows; while radar flow meters can be used to monitor the discharge rate of rainwater to ensure the efficient operation of the drainage system.