Wuhan WTR Expert Technology Co., Ltd.
Radar Flowmeter
The SCJ-LL21 radar flowmeter is an integrated device designed for simultaneous measurement of flow velocity and water level using non-contact radar technology. Flow velocity is measured based on the Doppler effect of electromagnetic waves, while water level is determined using Frequency Modulated Continuous Wave (FMCW) technology.
Classification:
Contact:
Features
● Adopting imported Doppler radar antennas for highly accurate flow velocity measurement;
● Compact size, light weight, dedicated mounting bracket assembly, easy to install;
● The waterproof, lightning-resistant, and non-contact design ensures reliable performance under various extreme weather conditions, enabling continuous and stable operation 24/7.
● Ultra-low power consumption and ultra-low quiescent current make it more suitable for unattended outdoor environments.
● The flow rate range is configurable, enabling optimal balancing of sampling accuracy and measurement speed.
● Non-contact flow measurement, no obstruction to water bodies; no drift and no need of calibration
● The supporting configuration program makes the debugging configuration easier;
● It can be equipped with the company's telemetry terminal to realize remote data transmission and provide a free platform to view data.
Parameter
| Parameter | Explanation |
|
Power supply |
DC 12V/24V (limit DC 9-28 V) Recommended DC12V |
|
Working current |
Average current < 27 mA @ DC12V, 25℃ ① |
|
Operating temperature |
-30℃~70℃ |
|
Storage temperature |
-40℃~85℃ |
|
Flow velocity range |
0 - 65 m/s (Settable range: 0 - 18 m/s; 0 - 36 m/s; 0 - 65 m/s), default: 0 - 18 m/s ② |
|
Flow velocity accuracy |
1% (±1cm/s with 1 m) |
|
Flow velocity resolution |
1mm/s |
|
Water depth range |
0-50m or 0-12m |
|
Water depth accuracy |
±3mm |
|
Water depth resolution |
1mm |
|
Waterproof grade |
IP68 |
|
Power supply protection |
Anti-reverse connection protection, ESD protection |
|
Limiting operating temperature |
-35℃~80℃ |
|
Communication interface |
RS485 interface (baud rate 9600, 8, N, 1), effective transmission distance 1000m (external 150 Ω matching resistor is required for > 300m) ③ |
|
Communication protocol |
Standard Modbus-RTU protocol, function code 03H |
|
Flow measurement radar frequency |
24GHz |
|
Flow measurement antenna beam angle |
Horizontal 12°, vertical 25° |
|
Radar frequency |
76-81GHz |
|
Antenna beam angle |
Omni-directional 6° |
|
Size |
160x100x95mm |
|
Weight |
1.86Kg(Excluding cables and brackets) |
① Current consumption varies depending on the operating mode, with the default power specification corresponding to continuous data acquisition mode.
② The default velocity range is set to 0–18 m/s. A wider flow rate range enables faster data acquisition; however, this results in reduced resolution.
③ For communication distances exceeding 50 m, voltage drop due to power supply attenuation must be taken into account. Cables with a cross-sectional area of at least 1.5 mm² are recommended for distances beyond 100 m. Longer runs require progressively thicker conductors. Alternatively, increasing the supply voltage within acceptable limits may mitigate voltage drop over extended distances.
④ Prior to powering the device, inspect all wiring connections carefully. Under no circumstances should the RS485 communication lines be connected to the power terminals, as this may result in permanent damage to the device’s communication module.
Keyword:
Radar Flowmeter
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FAQ
Q
Q: Are you trading company or manufacturer ?
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A
A: We are a manufacturer, committed to producing high accuracy, long-term stability, cost-efficient pressure/ level/ temperature measuring instruments.
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Q: What's your quality control system?
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A
A: All of our products are completed with inspection before shipment. And all of our products will be fully pre-inspection by QC departments before shipping to you . We have the certification of ISO, we could send the certification test of our company to you.
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Q: What is the warranty of your products?
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A
A: 2 years for level transmitter and pressure transmitter series others are 5 years from shipment date, for non-man-made damages.
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Q: What is your shipping method?
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A: Small orders are delivered with DHL, FedEx, TNT, UPS , EMS. Large orders are recommended to ship by sea.
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Q: Do you provide samples ?
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A: Yes,we have materials in stock to help you to get the samples as soon as we can.
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Q: How long will you give me the reply?
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A: We can support you 24Hours online service via email, skype, what'sapp, facebook etc within 1 hour.
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If you have already experienced our product, please let us know your true feelings. Your satisfaction is our driving force for progress, while your suggestions are our valuable asset for continuous improvement.
Contact Us
Contact Us
Add: Lianxiang Enterprise Center, No.11 Fenghuang Avenue, Canglong lsland, Jiangxia Distrlct, Wuhan City Hubei Province
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