The difference between ultrasonic flowmeter and electromagnetic flowmeter

Comparison of the characteristics and differences between ultrasonic flowmeters and electromagnetic flowmeters

Ultrasonic flowmeters and electromagnetic flowmeters are common industrial flow measurement equipment, and each has different characteristics and application fields.

Ultrasonic flowmeter:

Features:

1. Non-intrusive, no pressure loss;

2. Easy to install and maintain Low cost;

3. Wide measurement range, can measure high temperature, high viscosity liquids and gases;

4. Flexible flow channel design, suitable for various scenarios and pipe diameters.

Difference:

1. Measurement principle: Ultrasonic flowmeter uses ultrasonic technology to measure flow rate. It emits ultrasonic waves through the sensor into the medium to be measured, and then receives the signal that bounces back. According to the ultrasonic waves The flow rate is calculated based on the propagation speed in the medium; while the electromagnetic flowmeter uses Faraday's law to measure the flow rate due to the magnetic field induction phenomenon of moving charged particles in the conductive medium.

2. Different situations of environmental interference: Because ultrasonic flowmeters need to send and receive ultrasonic signals, they are greatly affected by external factors such as noise and noise, and are more susceptible to environmental interference than electromagnetic flowmeters.

Electromagnetic flowmeter:

Features:

1. High accuracy and good long-term measurement stability;

2. Non-occlusion It is flexible, has no moving parts, and has high reliability;

3. It has a wide range of applications and can measure conductive liquids.

Difference:

1. Measurement principle: As mentioned above, the electromagnetic flowmeter uses the charged particles passing through the conductive medium to be subjected to an external magnetic field to induce an oscillating electrical signal. to obtain traffic data in real time.

2. Different situations of environmental interference: Since electromagnetic waves will have a certain impact on the electromagnetic flowmeter, it is easy to use in harsh sites or complex process conditions such as Asian medium-frequency radioactive radiation, strong light sites, etc. Restricted.

In summary, ultrasonic flowmeters and electromagnetic flowmeters each have their own advantages and disadvantages, and have different application characteristics and values ​​in different occasions.