Electromagnetic flowmeter requirements for the measured medium

Case introduction

1. Conductivity requirements

Electromagnetic flowmeters measure the conductivity of liquid or gas, so the conductivity of the measured medium is one of the important factors affecting the measurement accuracy of the electromagnetic flowmeter. In general, the higher the conductivity, the higher the accuracy. For media with low conductivity, special measuring electrodes or an increased number of electrodes are required to improve measurement accuracy.

2. Viscosity requirements

Electromagnetic flowmeters are not suitable for measuring high-viscosity media, because fluid movement in high-viscosity media will encounter great resistance, which reduces the measurement accuracy. For media with higher viscosity, it is usually necessary to use a flow meter with another measuring principle for measurement.

3. Temperature requirements

The temperature range of electromagnetic flowmeter application is usually between -20℃~+60℃, so the temperature of the measured medium also needs to be within this range. When the temperature of the measured medium exceeds this range, the electromagnetic flowmeter may have errors, resulting in inaccurate measurement results.

IV. Liquid purity requirements

Electromagnetic flowmeters have relatively high requirements for liquid purity. Solid particles, bubbles and other impurities cannot exist, otherwise the measurement accuracy will be affected. For media with impurities, equipment such as filters or screens need to be used for purification.

In short, electromagnetic flowmeters have high requirements for the measured medium in terms of conductivity, viscosity, temperature and liquid purity. When selecting an electromagnetic flowmeter, it is necessary to comprehensively consider various characteristics of the medium to ensure measurement accuracy and stability.