Sewage electromagnetic flowmeter grounding introduction

The flow signal detected by the sensor electrode of the electromagnetic flowmeter is millivolt level and is based on the potential of the fluid in the sensor, so external interference has a great influence on it. Therefore, good grounding largely determines the measurement of the flowmeter. Accuracy. The fluid being measured itself acts as an electrical conductor and must exclude other unrelated electromagnetic interference. The potential signal detected by the electrode is not disturbed by the external parasitic potential. The sensor should have a good separate ground wire with a grounding resistance of less than 10 Ω. If an insulating layer or a non-metallic pipe is used in the pipe connecting the sensors, a grounding ring should be installed on both sides of the sensor.