Electromagnetic flowmeter with voltage-amplitude conductivity-sensing function for a liquid in a tube

An electromagnetic flowmeter with voltage-amplitude conductivity-sensing function for a liquid in a tube, comprising:

• a first microprocessor;
• a transducer, comprising two coils and two sensing electrodes;
• an exciting-current generating device, electrically connected to the first microprocessor and the coils;
• a flow-sensing device, electrically connected to the first microprocessor;
• a voltage-amplitude conductivity measuring device, electrically connected to the first microprocessor;
• and
• a switch, electrically connected to the sensing electrodes, the first microprocessor, the flow-sensing device, and the voltage-amplitude conductivity measuring device;
• wherein the switch makes an electrical connection between the sensing electrodes and the flow-sensing device or the sensing electrodes and the voltage-amplitude conductivity measuring device according to a signal sent by the first microprocessor, the first microprocessor makes the exciting-current generating device to generate an exciting current when the sensing electrodes and the flow-sensing device are electrically connected so as to calculate flow rate of the liquid, and the first microprocessor stops the exciting-current generating device to generate the exciting current when the sensing electrodes and the voltage-amplitude conductivity measuring device are electrically connected so as to calculate conductivity of the liquid.