Pump device and method for determining the concentration of a substance inside a liquid
a technology of a pump device and a liquid concentration, which is applied in the direction of material analysis, material testing goods, instruments, etc., can solve the problems of insufficient detection sensitivity of these known sensors, leakage of leakage data, and inability to detect the sensitivity of known sensors, so as to eliminate the influence of further capacitance of the electrodes, the effect of detecting the capacitance and reducing the influence of the capacitance of the electrod
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[0044]The example of a pump device according to the invention shown in FIG. 1 is a submersible waste-water pump. The pump device has a motor housing 2 attached to a pump housing 4. The pump housing 4 contains an impeller, which is driven by an electric drive motor arranged in the motor housing 2. The pump housing 4 has an inlet 6 on the bottom side and an outlet 8 extending in radial direction from the pump housing 4 and configured to be connected with a further outlet pipe. On top of the motor housing 2, there is arranged an electronic housing 10 containing a control electronics for the drive motor. Connected to the electronic housing 10 is a supply cable for the electric power supply 12. Between the motor housing 2 and the pump housing 4, there is arranged a sealing assembly to separate the interior of the motor housing 2 from the pump housing 4, since the motor housing 2 is dry, whereas the interior of the pump housing 4 is filled with a liquid as water to be pumped. The shaft 14...
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