The OTT SLD is an acoustic Doppler sensor system for continuous monitoring of flow velocity and water level (optional) in rivers and channels. The system guarantees reliable velocity measurements even in a flood situation with high sediment loads.
The OTT SLD measures velocity in up to 9 adjacent cells with two horizontal beams looking sideways into the flow (Side Looking Doppler). The compact design reduces constrction efforts and allows an economic installation.
The optimised low power consumption allows an autarkic operation with a solar power system.
In combination with the Station Manager LogoSens® , the OTT SLD can be extended to a continuously working discharge measurement system. The sensor is connected via integrated SDI-12 interface to the LogoSens®, which then calculates the discharge from water level and flow velocity and transfers the measured data via telephone, GSM or satellite to the central station. | 
