SQ-R Non-Contact Radar Flow Meter

The SQ-R measures continuously and contact-free the flow rate of effluent channels, partially filled pipes, and technical ducts in industry and water supply. The SQ-R is not in contact with the water and can therefore be operated without being affected by debris and entrained solids. With its compact design and versatile mounting options, it is the ideal choice for flow measurements in manholes of facilities and sewers.

The SQ-R is specially designed for municipal and industrial applications in wastewater treatment plants, sewers, and process water circuits. For example, the amount of wastewater entering a treatment plant can be monitored to control the facility and allocate wastewater costs. Furthermore, the duration and frequency of rain and flood events can be recorded, which is essential for sewer management by plant operators and utilities.

Due to its compact design and flexible mounting device, the sensor is very easy to install, for example under bridges or extensions, on ceilings of sewers or in manholes. The non-contact measuring technology has the decisive advantage that the sensor can be mounted above the water level. Thus, the SQ-R can be easily installed, is readily accessible and cannot be clogged or blocked by entrained solids, which is often the case with submerged sensors.

A specially designed adjustable mounting bracket is available for installation in manholes of sewers.

• 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

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)

GENERAL

• Dimensions 272 x 153 x 186 mm (1 bracket for pipe with Ø 30 mm)

• Total weight 1.55 kg

• Protection class IP 68

• Power supply 6 ... 30 V DC

• Power consumption 1.5 Ah per day (for a measurement interval of 60 s)

• Operating temperature -40…85 °C (-40…185 °F) C

• Storing temperature -40° ... 60° C

• Protection over voltage protection, reverse power protection, lightning protection

LEVEL MEASUREMENT

• Measuring range 0.05 ... 8 m (0.16…26.25 ft)

• Radar frequency 80 GHz (W-band)

• Beam angle 8

• Near field blanking 0.05 m

• Resolution ≤ 2 mm

VELOCITY MEASUREMENT

• Measuring principle Doppler-radar

• Measuring range 0.08 ... 16 m/s (depending on flow conditions)

• Accuracy +/- 0.01 m/s; +/- 1 % FS

• Resolution 1 mm/s

• Direction recognition +/-

• Measuring duration 5 ... 240 sec.

• Measuring interval 8 sec. ... 5 h

• Measuring frequency 24 GHz (K-Band)

• Radar opening angle 12°

• Distance to water surface 0.05 ... 35 m (0.16...114.83 ft)

• Required minimum swell 3 mm

AUTOMATIC VERTICAL ANGLE COMPENSATION

• Accuracy +/- 1°

• Resolution +/- 0,1 °

(One SQ-R W/ 20 M Cable)

11X9X19 Inches @ 10 LBS

(27X24X47 CM @ 4.5 KG)

(One Stainless Steel V4A Mounting Bracket Without Adjustable Tube)

33X25X7 Inches @ 40 LBS

SHIPPING NOTE: Orders for two or more systems which include the manhole installation bracket are considered oversize and will be shipped by LTL Freight.