Open Channel Flow Meter
Product Notes:
1. All Online Water Quality Meters and Sensors ship direct from the factory. Please allow 10-15 business days for shipping and handling.
2. Custom options and configurations are also available. Please contact us if you need help with your specific application.
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The Sper Scientific Open Channel Flow Meter calculates water flow from measured liquid level and the level-to-flow relationship of a compatible measuring weir.
Applications include wastewater discharge points and municipal sewer channels.
The wall-mounted ultrasonic open channel flow meter measures water level without contacting the liquid. A sensor transmits ultrasonic pulses toward the water surface and measures the time taken for the echoes to return. The meter uses this distance measurement to determine water level, then calculates flow using the level-to-flow relationship for the configured weir or flume.
The display shows instantaneous flow rate, accumulated flow and water level. Non-contact measurement keeps the sensor away from wastewater, reducing exposure to contamination and corrosion. Accurate flow measurement requires a compatible measuring structure, proper installation and suitable free-flow conditions.
This method is used to monitor water and wastewater flow in open channels, including wastewater treatment plant discharge channels, industrial effluent outlets and municipal sewer systems. Accurate results depend on proper weir installation, correct level measurement and selection of the appropriate flow calculation.
Applications
- Water and wastewater treatment
- Power generation and mining
- Food processing
- Petrochemical facilities
- Intake channels, drainage channels and discharge outlets
- Stream and river monitoring at suitable measuring structures
- Integration with process monitoring and control systems
Main Features
- Water level, instantaneous flow and accumulated flow display
- Settings backup and restoration
- Configurable analog output
- Digital filtering and echo recognition
- Manually configurable suppression of fixed interference echoes
- Custom mathematical calculations
- Adjustable sound velocity for specific measurement conditions
- Level-to-volume conversion for configured vessels; weight calculation requires appropriate volume and density settings
- Bluetooth, GPRS and Wi-Fi connectivity, depending on configuration
- Optional custom serial data format, specified when ordering
- Optional Mini SD card data logging, USB output and microprinter support, specified when ordering
Specifications
| Part number | 870023 |
|---|---|
| Flow range | 0.1 L/s–10 m³/s |
| Flow accuracy | ±1–3%, depending on measuring weir |
| Maximum level | 3 m |
| Level accuracy | ±0.3% within 3 m |
| Resolution | 1 mm |
| Totalizer | 12-digit decimal; resets when accumulation capacity is reached |
| Output | 4–20 mA |
| Communication | RS485 Modbus |
| Relay options | 1–4 outputs; please specify when ordering |
| Power options | 220 VAC, 50 Hz or 12–36 VDC, 3 W |
Signal input (Please specify when ordering)
Digital signal: RS485 (supports Modbus protocol)
Current signal: 4-20mA
Transducer signal: voltage
Signal output (Please specify when ordering)
Voltage output: DC12V or 24V
Analog output signal: 0 ~ 20mA; 4 ~ 20mA load > 300Ω; 0 ~ 5V; 0 ~ 10V
Digital output: RS485 (support Modbus); USB, memory card 8G
Wireless transmission: built-in GPRS wireless communication optional SMS data prompt (acquisition system can be customized)
Switch output: two NPN/3 relays (AC: 5A 250V DC: 10A 24V)
Power
Working voltage: DC12-24V or AC160V~250V
Normal power consumption: <5W
Downloads
FAQs
How is flow determined?
From liquid level and the selected weir’s level-to-flow relationship.
What affects flow accuracy?
The measuring weir used in the installation.
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Product Information
Product Information
The Sper Scientific Open Channel Flow Meter calculates water flow from measured liquid level and the level-to-flow relationship of a compatible measuring weir.
Applications include wastewater discharge points and municipal sewer channels.
The wall-mounted ultrasonic open channel flow meter measures water level without contacting the liquid. A sensor transmits ultrasonic pulses toward the water surface and measures the time taken for the echoes to return. The meter uses this distance measurement to determine water level, then calculates flow using the level-to-flow relationship for the configured weir or flume.
The display shows instantaneous flow rate, accumulated flow and water level. Non-contact measurement keeps the sensor away from wastewater, reducing exposure to contamination and corrosion. Accurate flow measurement requires a compatible measuring structure, proper installation and suitable free-flow conditions.
This method is used to monitor water and wastewater flow in open channels, including wastewater treatment plant discharge channels, industrial effluent outlets and municipal sewer systems. Accurate results depend on proper weir installation, correct level measurement and selection of the appropriate flow calculation.
Applications
- Water and wastewater treatment
- Power generation and mining
- Food processing
- Petrochemical facilities
- Intake channels, drainage channels and discharge outlets
- Stream and river monitoring at suitable measuring structures
- Integration with process monitoring and control systems
Main Features
- Water level, instantaneous flow and accumulated flow display
- Settings backup and restoration
- Configurable analog output
- Digital filtering and echo recognition
- Manually configurable suppression of fixed interference echoes
- Custom mathematical calculations
- Adjustable sound velocity for specific measurement conditions
- Level-to-volume conversion for configured vessels; weight calculation requires appropriate volume and density settings
- Bluetooth, GPRS and Wi-Fi connectivity, depending on configuration
- Optional custom serial data format, specified when ordering
- Optional Mini SD card data logging, USB output and microprinter support, specified when ordering
Specifications
| Part number | 870023 |
|---|---|
| Flow range | 0.1 L/s–10 m³/s |
| Flow accuracy | ±1–3%, depending on measuring weir |
| Maximum level | 3 m |
| Level accuracy | ±0.3% within 3 m |
| Resolution | 1 mm |
| Totalizer | 12-digit decimal; resets when accumulation capacity is reached |
| Output | 4–20 mA |
| Communication | RS485 Modbus |
| Relay options | 1–4 outputs; please specify when ordering |
| Power options | 220 VAC, 50 Hz or 12–36 VDC, 3 W |
Signal input (Please specify when ordering)
Digital signal: RS485 (supports Modbus protocol)
Current signal: 4-20mA
Transducer signal: voltage
Signal output (Please specify when ordering)
Voltage output: DC12V or 24V
Analog output signal: 0 ~ 20mA; 4 ~ 20mA load > 300Ω; 0 ~ 5V; 0 ~ 10V
Digital output: RS485 (support Modbus); USB, memory card 8G
Wireless transmission: built-in GPRS wireless communication optional SMS data prompt (acquisition system can be customized)
Switch output: two NPN/3 relays (AC: 5A 250V DC: 10A 24V)
Power
Working voltage: DC12-24V or AC160V~250V
Normal power consumption: <5W
Downloads
FAQs
How is flow determined?
From liquid level and the selected weir’s level-to-flow relationship.
What affects flow accuracy?
The measuring weir used in the installation.
Description
Description
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Product Category: Liquid Flow Meters
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