As the most simple reliable and cheap way to provide control over filling the tank?
Introduction: there is a water station located on the Kamchatka Peninsula in the small village. Withdraws water from the river and pumping into a reservoir from which gravity is used to supply consumers. The reservoir is located 3 km from the village and from the station, electricity is not fed back. Currently, the pumps are just "spout", you need to make the system controlling the filling to the level and maintain it. Cellular communication is not reliable, to lay a cable supposedly is too expensive.
UPD: the solution should be energy efficient pumps at 100 kW, twist them wasted on a bypass would not be desirable.
UPD2: diameters there is not domestic, if you put a mechanical valve you need roughly du200
What is the period of arrival to the site You want? Or want to be powered by solar panels?
anabel_Blick28 answered on June 10th 19 at 15:58
Is there line of sight between pump and tank?
The required height of the antenna to obtain line of sight?
The intensity of the sun and wind in the area of the tank?
The easiest and cheapest way: put on the tank electronics, to power it from the battery+SES/VES and radio to give as a pump.
maxie.Mo answered on June 10th 19 at 16:00
Look at the top of the tank to make a hole and in the hole to clog the hose leading to the river. When the water reaches this hole, it will automatically flow into the river! And the pumps cut off when the hose will the water! That's all!
spencer.Kassulke answered on June 10th 19 at 16:02
The water level sensors with controller for battery charging from solar panels, and the radio channel to transmit data