Patent ID: 9658089
Date: 2017-05-23
CPC Classifications: G01F,G01N

Claim:
1. 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 is configured to drive 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 is configured to stop the exciting-current generating device from generating 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.