Ultrasonic depth sensor to measure water levels

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Courtesy of LG Sonic

The Dutch algae control company LG Sonic introduced an ultrasonic depth sensor to give the customers real-time insight in the water levels which allows them to adequately deal with water level fluctuations. Reservoirs used for industrial processes or the production of drinking water often deal with strong water level fluctuations. Due to events of high demand and evaporation, water levels in reservoirs may decrease up to 60%, which can have serious effects on the water quality.

The ultrasonic depth sensor measures the real-time water levels of lakes and reservoirs. Water levels are naturally affected by factors such as rainfall and runoff or other factors such as high demand. If the water levels suddenly decrease, it can result in higher water temperatures and concentration of existing nutrients which leads to the die-off of plants and other organisms.

Another factor to take into account is climate change. Climate change contributes to a more frequent and severe algae growth in fresh water lakes.  These factors can contribute to the occurrence of algal blooms, reducing the water quality and intensifying the water treatment process. To prevent the occurrence of harmful algal blooms, it is important to have a real-time insight in the current water quality and water quantity of a water body.

An ultrasonic depth sensor is connected to the MPC-Buoy which is a solar-powered system that combines continuous online water quality monitoring and ultrasonic technology to effectively control harmful algal blooms in lakes and reservoirs. Every 10 minutes, the system measures essential algae indicators (Chlorophyll-a, Phycocyanin, and Turbidity) and water quality parameters (Dissolved Oxygen (DO), Redox, pH, and Temperature) to monitor and control algal blooms. This allows for an early warning of toxic algae blooms.

By incorporating a depth sensor, customers have a complete insight into the water quality and water quantity of their lakes and water reservoirs. The measured data can be viewed real-time via an online software called the MPC-View. Based on the received data it’s possible to change the ultrasonic program according to the specific water conditions.

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