The proposed device is designed for automatic control of vibrionaceae Malysh, Rucheek and the like for operation in boreholes (wells) with a low flow rate of water or for periodic pumping of groundwater. Machine applied non-contact water level sensors, installed directly on the lifting hose of the pump, allowing it to be used in wells of small diameter.
Vibronics (Fig. 1) with a water hose hanging on a metal rope in the well. Hose sensors are provided at top water level (VU) and lower level (WELL). The device operation is based on the change in conductivity between the common electrode, which is used as a metal cable suspension pump, electrodes and sensors located in the water and out of it. The condition of the sensors is analyzed by a logical node on the chip DDI (Fig. 2).
The work cycle of the machine proceeds as follows. When the sensors of the upper and lower levels are in the water, the conductivity between the cable and the electrodes of both sensors is large, and when the power toggle switch SA1 at the inputs R and trigger levels are set logic 1, resulting in the same level on its direct output, causing the opening of the key transistors VT1, VT2, and the inclusion of relay K1, the contact K1.3, K1.4 connects the pump to the network.