Sommer - SQ-R + Discharge Measurement System
No Flume Required
Non-contact flow measurement for wastewater treatment plants, sewers and industrial water channels
SQ-R + Non-Contact Radar Discharge Measurement System
Ideal for wastewater treatment plants, sewers, and industrial open channel Applications.
The SQ-R provides continuous, non-contact measurement of flow rates in effluent channels, partially filled pipes, and technical ducts used in industrial and water supply applications. Because the sensor does not come into contact with the water, it operates reliably without interference from debris or entrained solids. Its compact design and versatile mounting options make the SQ-R an ideal solution for flow measurement in manholes, facilities, and sewer systems.
Fields of Application
The SQ-R is specifically designed for municipal and industrial applications, including wastewater treatment plants, sewer networks, and process water circuits. It enables accurate monitoring of wastewater inflow to treatment facilities, supporting operational control and fair allocation of wastewater costs. In addition, the system records the duration and frequency of rain and flood events—critical data for effective sewer management by plant operators and utilities.
Implementation
Thanks to its compact design and flexible mounting options, the sensor is very easy to install—for example, under bridges or extensions, on sewer ceilings, or in manholes. The non-contact measuring technology offers a key advantage: the sensor can be mounted above the water level. As a result, the SQ-R is easy to install, readily accessible for maintenance, and not subject to clogging or blockage by entrained solids, which is a common issue with submerged sensors.
A specially designed adjustable mounting bracket is available for installation in manholes of sewers.
Features and Benefits
Non-contact measurement, maintenance-free system
Calculation of discharge by continuous measurement of flow velocity and water level
No construction measures necessary in the sewer
Waterproof and resistant housing also for use in aggressive environments
Wide measuring range from a few liters up to several cubic meters per minute
High data availability even with intensive turbidity and high solids content
Easy integration into existing measuring and control systems
Self-check function supports correct installation and high data quality
Versatile measurement output via RS-485, Modbus, SDI-12, pulse and analog signal
Integrated hydraulic model for precise flow calculations
Easy configuration with SQ-Commander software
Water Flow Measurement by Non-Contact Radar Flow Meter
Typical Installations
Water Treatment Plants
Industrial Effluent
Sewage System (No Flume Required)
Irrigation Canals
Stormwater Canals
How does it work?
Flow velocity
A 24 GHz radar sensor measures the velocity of the water surface. Radar impulses are transmitted at an angle towards the water surface where ripples and waves induce a Doppler frequency shift that is detected by the SQ-R.
Water level
A radar sensor measures the distance between the SQ-R and the water surface by registering the travel time of an impulse sent towards the water surface. An ultrasonic level sensor is available on request.
Water discharge
The discharge Q is computed by the SQ-R:
Q = vm * A (h)
Watch Video
A worker in a yellow reflective vest and orange safety helmet kneels beside an open manhole, pouring a liquid into it with a shovel, surrounded by orange traffic cones on a paved street.
Industrial water treatment facility with pipes, walkways, and water in a clarifier or sedimentation basin.
Industrial water treatment plant with pipes and machinery, mountain background.
A metal structure with a white box attached to a vertical pole and a wire, situated on a sandy or muddy outdoor surface near water, with a fence and some vegetation in the background.
View underneath a bridge over water showing concrete supports and a drainage pipe.
An open manhole covers a sewer or drainage system with mechanical equipment inside, surrounded by gravel or dirt ground.
A large circular industrial tank with metallic support structures and tools inside, some of which are submerged in dark liquid.
A survey radar installed in a construction site opening, with a metal frame and surrounding dirt and gravel.
A small canal or waterway with a basketball hoop and basketball in mid-air above it, set in a green outdoor area with trees and a blue sky.
A white GPS antenna mounted above a dark water-filled trench on a construction site, with metal framing and textured metal flooring nearby.
Underground tunnel with concrete walls, dark interior, and some pipes and wiring on the sides.
Close-up of a white underground electrical or communication junction box with wires, a CCTV camera mounted on the ceiling, and an underground conduit connection with wires, all set outdoors.
Diagram of a process control system involving wireless communication with industrial equipment. It includes web servers connected via HTTP/FTP, several wireless transmitters, and receivers on a green field with machines, a tank, and gauges. The system uses pulse signals, mod/profibus, RS-485/SDI-12, and 4-20mA communication protocols, managed by a central process control system.