StarFlow QSD Flow Meter

Advantages

Robust, reliable and easy to use absolute sensor
Range of up to 10 m
Sealed against water ingress
Low maintenance, low power, no calibration and no complicated power arrangements required
Uses ultrasonic Doppler Principle in Quadrature Sampling Mode to measure water velocity
Incorporates ultrasonic depth sensor and an absolute pressure depth sensor
Works with barometric pressure sensors

Automated Water Quality & Flow
Irrigation channel measurement & control
Flood monitoring / flood alerts
Rivers & streams monitoring
Surface water monitoring
Industrial outflow monitoring

Specifications

Physical Specifications

Material

Epoxy-sealed body, Marine Grade 316 Stainless Steel Mounting Bracket

Size

135 mm x 55 mm x 22 mm (LxWxH)

Weight

1 kg with 15 m of Cable

Operating temperature

0°C to 60°C water temperature

Velocity and Depth Specifications

Velocity Range

20 mm/s to 0.8 m/s
20 mm/s to 1.6 m/s in one direction (default)
20 mm/s to 3.2 m/s
20 mm/s to 13.2 m/s
Bidirectional velocity capability, set using configuration tools

Velocity Accuracy

±1% typical

Depth Range Ultrasonic Sensor

20 mm up to 5 m above top surface of the instrument
40 mm up to 5 m from the base of the instrument

Depth Accuracy Ultrasonic Sensor

Typical ± 1%

Depth Range Absolute Pressure Sensor

0 to 10 m

Depth Accuracy Absolute Pressure Sensor

Typical ± 0.19% for 0 m to 5 m range
Typical ± 0.38% for 0 m to 10 m range

Temperature

0°C to 60°C

Temperature Resolution

0.1°C

Flow Computation

Flow rate, totalised flow with companion NRT/NRL

Channel type

Pipe, open channel, natural stream

Conductivity (6537 Only)

0-200,000uS/cm Typically ±1% of measurement, returned either as 16-bit value (0 65535uS/cm) or 32-bit value (0-262,143uS/cm)

Compensation Conductivity (6537 Only)

25°C default / set using configuration tools

Cable

15 metre, 6 way

Cable Options

User specified up to 50 metres

Electrical Specifications

Power Source Typical

External Battery 12V – 24V DC

Power Usage

10V to 24V DC, 50µA standby, 100mA active for 1 sec

SDI-12

SDI-12V 1.3 recorder (1200 baud smart instrument channel)

RS 485

Modbus RTU

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Advantages