Description

6527 (Starflow): Water Flow Meter (Doppler)

(For measurement Measures Water Velocity, Depth, Flow rate, Total Flow, Temp.)

The Unidata 6527 Starflow QSD SDI-12 and Modbus Instrument is used to measure water velocity, depth and temperature of water flowing in rivers, streams, open channels and large pipes. When used with a companion Unidata data logger, flow rate and total flow can also be calculated.

Key Features:-

• Measures forward and reverse
• Measures Water Velocity, Depth, Flow rate, Total Flow, Temp.
• Programmable to compute flow in pipes and open channels
• Operates in water qualities from fresh water streams to primary sewage
• Battery powered - ideal for use in remote locations

Applications:-

• Irrigation channel measurement and control
• Flood monitoring/ Flood alert
• Waste water treatment Plant monitoring
• River and streams monitoring
• Surface water monitoring
• Industrial outflow monitoring

 

Descriptions:-

The Unidata 6527 Starflow QSD SDI-12 and Modbus Instrument is used to measure water velocity, depth and temperature of water flowing in rivers, streams, open channels and large pipes. When used with a companion Unidata data logger, flow rate and total flow can also be calculated.

 

The 6527 Instrument is robust, reliable and easy to use. It is completely sealed against water ingress, low maintenance, low power, no calibration and no fussy power arrangements required.

 

Ultrasonic Doppler Principle in Quadrature Sampling Mode is utilised to measure water velocity. The 6527 Instrument transmits ultrasonic energy through its epoxy casing into the water. Suspended sediment particles or small gas bubbles in the water reflect some of the transmitted ultrasonic energy back to the 6527 Instrument’s ultrasonic receiver instrument that processes this received signal and calculates the water velocity.

 

The 6527 Starflow QSD incorporates ultrasonic depth sensor and an absolute pressure depth sensor. An ultrasonic depth sensor measures the water depth using the ultrasonic principle and has a range of up to 5m. An absolute pressure sensor measures pressure forces applied to the strain gauge. The absolute, non-vented, sensor reports a value equal to the sum of the water pressure and the atmospheric pressure above the water.

 

The 6527 instrument’s low profile form factor minimises disturbance to the flow it’s measuring. Furthermore, 6527 instrument measures velocity in both directions and is suitable for use in a wide range of water qualities, from sewage to potable water, seawater too.

 

With a companion Unidata data logger or Neon Logger, the instrument can be programmed to compute flow rate and total flow in pipes and open channels of known dimensions.

 

                  Technical Specification

Velocity Range: 20mm/s to 13.2m/s

Velocity Accuracy : ±1% typical

 

Depth Range (Absolute Pressure Sensor) :  20mm up to 10 meter

Depth Accuracy (Absolute Pressure Sensor) : ± 0.38% typical

 

 

Temperature range : 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

Cable :  15 meter, 6 way

Cable Options: User specified up to 50 meters (on demand)

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

 

Technical Specifications (3004 Neon Datalogger)

 

Storage memory : 7.5Mbytes Flash (non-volatile), 3.75 Million log data points

Memory expansion : SD card, micro size, 32Gbyte maximum capacity, 16 Billion log data points

Scan rate : Programmable from 1 second to 5 minutes

Log rate : Programmable from 1 second to 24 hours

External Power : 9 to 30V DC

Current Draw : 50µA Standby

RTC Backup Battery : 3.6V Li Coin Cell (5-year life)

Internal Power : 3.6 Volt Lithium D Cell

Instrument Power : 5V or 12V or 18V regulated, 80mA (user selectable)

Analog channels : 4, Single-ended (max) or 2 Differential (max),

Size : 190mm x 80mm x 55mm (L x W x H), 300g

Operating Temperature : -20° to +60°C. Not affected by humidity