The Open Channel Flow Meter is a non-contact ultrasonic device designed to measure liquid flow rates in open channels, rivers, irrigation canals, and wastewater flumes/weirs.
It measures the liquid level using ultrasonic waves and calculates the flow rate based on standardized hydraulic formulas.
The non-contact design ensures no fouling, minimal maintenance, and excellent reliability even in harsh sewage or outdoor environments.
Non-contact measurement – no corrosion, clogging, or fouling issues
Smart algorithms – supports multiple flume/weir equations (Parshall, rectangular, V-notch, etc.)
Outdoor ready – weather-resistant with high protection rating
Inflow/outflow measurement at treatment plants
Canal and drainage monitoring
Factory discharge, chemical wastewater
River flow measurement, water resource management
Spillways, ecological flow monitoring
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Measuring Range |
2m/ 5m/ 8m/ 10m/15m/ 20m/ 25m/ 30m |
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Blind zone |
＜0.3-1.5m（different for range） |
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Accuracy |
±0.3% FS; |
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Output Signals |
4–20mA, RS485, Mini SD card |
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Power Supply |
24V DC / AC220V |
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Medium Temperature |
-20°C ~ +80°C (high-temp probe optional) |
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Display |
LCD/LED showing flow, totalizer, and level |
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Cable Length |
Standard 10 m; extendable up to 100 m |
