Reliable flow measurement in open channels
Ensure compliance and efficiency with FlexView FMA90 and Micropilot FMR20B
Open channel flow measurement is essential in wastewater treatment plants for monitoring influent and effluent flows, ensuring regulatory compliance, and optimizing process control. Open channels rely on gravity driven flow, making them suitable for raw sewage and treated water streams. Measurement typically uses primary devices such as weirs or flumes, combined with radar or ultrasonic level sensors connected to a control unit.
The benefits
Precise flow calculation in open channels, weirs, and pipes
Easy configuration with predefined flumes and weirs (Q/H tables)
Two independent flow and totalizer calculations with sum or difference of both measurements in one control unit
Accurate pulse outputs for samplers and plant control systems
Backwater detection and compensation using a second level sensor
The challenge
Wastewater flow measurement in open channels faces multiple challenges: fluctuating hydraulic conditions, backwater effects, and environmental influences such as foam, turbulence, and debris. Traditional systems often lack flexibility for different channel types and struggle with accurate compensation when downstream restrictions occur. Additionally, integrating reliable signals for samplers and plant control systems can be complex, especially when multiple measurement points are required. These issues demand a robust, adaptable solution that ensures precision, easy configuration, and dependable performance under harsh conditions.
Our solution
FlexView FMA90 is a versatile control unit for radar, ultrasonic, hydrostatic, HART or universal 4–20 mA level sensors. It offers precise flow calculation in open channels, weirs, and pipes, with easy selection of predefined flumes and integrated Q/H tables for quick configuration. The device supports two independent flow calculations and totalizers in one unit, making it ideal for multi-point monitoring. Advanced backwater detection and compensation using a second level sensor ensures high accuracy even under challenging conditions. Available in field, DIN rail, and panel housing variants, FlexView FMA90 guarantees seamless installation and reliable operation in wastewater plants.
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