- The OTT SLD is a measurement system for continuous measurement of water velocity and level in streams, rivers, and canals. The sensor employs the acoustic Doppler principle to reliably- measure flow velocity in a variety of naturally occurring conditions, including during most flood events.
- Equipped with two horizontal ultrasonic transducers "looking sideways" into the flow (Side Looking Doppler) to measure water velocity.
- An optional vertical transducer and integrated pressure cell measures the water level.
- All measurement values are analyzed, verified and processed by an integrated signal processor, before being used in the calculation of discharge.
- Velocity measurements from up to nine cells are used, along with measured water level, to calculate discharge either internally in the OTT SLD or externally in a data logger.
- All measurements can be retrieved using SDI-12, RS485 , RS232 or Modbus RTU protocols and are available for storing in a data collection platform, such as the OTT netDL station manager.
- Reliable performance in waters with high sediment load and flood situations
- Applicable in natural rivers, streams, shipping-, irrigation- and service water canals
- Also suitable for small waterbodies (smallest cell size 20 cm)
Thông số kỹ thuật
- Flow velocity measurement :
+ Measuring range : ±10 m/s
+ Accuracy : 1% of measured value ± 5 mm/s
+ Number of measuring cells : 9
- Cell size / Blanking :
+ 600 kHz : 2 … 10 m / 0.5 … 30 m
+ 1.0 MHz : 1 … 4 m / 0.3 … 15 m
+ 2.0 MHz : 0.2 … 2 m / 0.1 … 8 m
- Beam angle / Max. profiling range :
+ 600 kHz : 2.4° / 80 m
+ 1.0 MHz : 2.4° / 25 m
+ 2.0 MHz : 2.1° / 10 m
+ Minimum coverage : 0.15 m (water level option)
- Electrical data
+ Supply voltage : 12 ... 16 V DC, typ. 12 V
+ Power consumption : 50 ... 500 mW, depending on measurement cycle
- Water level measurement :
(optional)
+ Measuring range : 0.15 ... 10 m
+ Accuracy : ±3 mm, depending on stratification
Pressure cell (optional)
+ Measuring principle : Piezo-resistive
+ Measuring range : 0 ... 10 m
+ Accuracy : ±0.25 % FS
- Interfaces : RS-232, SDI-12 or SDI-12 via RS-485, Modbus (optional)
- Environmental conditions :
+ Operating temperature : -5 ... + 35 °C
+ Storage temperature : -20 ... +70 °C
- Length x Ø : 45 ... 52.2 cm x 7.5 cm
- Housing material : POM
- Wall bracket (accessory) :
+ Components : Bracket, protective cover, and C rail mount
+ Material : Stainless steel
+ Details : On request