With the first ever high-level meeting on water and sanitation taking place in Washington in April, WaterAid is working to ensure the need for both these basic human rights remains high on the agenda.

To perform reception duties and ensure all the fitness facilities including the water level and temperature of the swimming pool are maintained in the best working and hygienic condition.

This paper introduces the working principles of an electronic double-water level alarm and the designing calculation of its related parameter selection.