OTT – Side Looking Doppler Sensor (SLD)

Water flow meter for longterm data collection of velocity and discharge measurements

Usage Type: Fixed installation
Measurement technology: Acoustic
Parameters measured: Flow velocity
Product Highlights: Side-Looking-Doppler for continuous discharge measurement in rivers and open channels. Discharge calculation based on velocity – index – method. Integrated vessel filter algorithm, Modbus interface and output of total volume of flow (max. interval 1 day).
Measurement range:  ± 10 m/s
Accuracy: ± 1 % of measured value ± 0.5 cm/s

Advantages:

• 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