SQ-R Discharge Measurement System

Request a quote or adviceAdded to Request List

The SQ-R sensor is a continuous measurement device for the contact-free determination of the water discharge of open or closed canals.

More information
BrochureManualWatch Video

Physical and environmental

Power supply

9...28 VDC; Reverse voltage protection, overvoltage protection

Power consumption at 12 VDC

1.5 Ah per day
Peak current drain 91 mA Inrush current <200 mA (for a measurement interval of 60 s)

Outputs

RS-485 ASCII / Modbus RTU SDI-12
Analog output 4…20 mA (14 bit, max. load 250 Ω)
Digital output (low: 0V, high: Vsupply, max. 1.5 A)

Operating temperature

-40…60 °C (-40…140 °F)

Storage temperature

-40…60 °C (-40…140 °F)

Relative humidity

0...100 %

Protection rating

IP 68

Lightning protection

Integrated protection against indirect lightning with a discharge capacity of 0,6 kW Ppp

Housing material

Zytel 103HSL NC010, resistant to aggressive substances typically found in sewage channels

Mounting bracket

Mounting cube Ø30 mm

Size L x W x H

272 x 152.2 x 185.5 mm (10.71 x
5.99 x 7.30 in), including mounting cube

Weight

1.55 kg (3.42 lb)

Velocity

Detectable measurement range

0.08…16 m/s (depending on waves)

Accuracy

± 0.01 m/s (certified by METAS)

Resolution

1 mm/s

Direction recognition

+/-

Measurement duration

5…240 s

Measurement interval

8 s…5 h

Measurement frequency

24 GHz (K-Band)

Radar opening angle

12°

Distance to water surface

0.05…35 m (0.16114.83 ft)

Vertical inclination

Measured internally

Automatic vertical angle compensation

Accuracy± 1 °

Resolution

± 0.1 °

Water level

Measurement range (distance between level sensor and water surface)

0.05…8 m (0.16…26.25 ft)

Accuracy

≤ 2 mm

W-band (80 GHz technology)

W-band (80 GHz)

Opening angle

8°

The SQ-R sensor is a continuous measurement device for the contact-free determination of the water discharge of open or closed canals. It combines two sensors in one system. The first determines the water level by measuring the transit time of a radar signal, the second simultaneously measures the flow velo- city of the water surface by means of the Doppler frequency shift. Following each measurement, the sensor applies an advanced hydraulic model to compute the mean velocity, which in turn is used to calculate the water discharge.

Due to the contact-free measurement method the SQ-R can be installed on extension arms without costly structural measures in the water or sewage treatment canal. This also has the advantage that the sensor is located outside the danger area of floods and that it requires virtually no maintenance over many years.