Electronic Flowmeter Purchasing Guide

The working principle of electronic flow meters is based on different measurement principles. Among them, the thermal type is a commonly used technique. It uses thermistors as sensors. When the fluid flows through, the flow velocity and flow rate are calculated by measuring the temperature change of the fluid as it flows through the sensor. When the fluid flows through the sensor, the temperature of the sensor will change, and the resistance value of the thermistor will also change accordingly. By measuring the change in the resistance value, the velocity and flow rate of the fluid can be calculated.

In addition to the thermal type, there are other measurement principles such as the piezoelectric type and the ultrasonic type. The piezoelectric type calculates the flow velocity and flow rate by measuring the pressure change generated by the flow of the fluid. The ultrasonic type calculates the flow rate by utilizing the relationship between the propagation speed of ultrasonic waves and the flow velocity of the fluid. These different measurement principles are applicable to different fluids and application scenarios and are widely used in various industrial fields, such as petroleum, chemical engineering, and electric power, for accurately measuring the flow of liquids, gases, or vapors.

When purchasing an electronic flow meter, the following guidelines can be considered:

1. Measurement Range: Firstly, it is necessary to determine the flow range that needs to be measured. Select the measurement range according to the actual requirements to ensure that the chosen electronic flow meter can meet the measurement needs.

2. Measurement Accuracy: Choose an electronic flow meter with high accuracy. Accuracy is usually measured by the precision grade of the equipment, for example, 1% or 0.5%, etc. Higher accuracy will help ensure the accuracy and reliability of the measurement results.

3. Fluid Properties: Consider the properties of the fluid to be measured, such as pressure, temperature, and viscosity. Ensure that the design and working parameters can adapt to the conditions of the fluid to be measured.

4. Pressure Resistance Capacity: Select an electronic flow meter with appropriate pressure resistance capacity according to the actual working environment. Ensure that the selected brand and model can withstand the pressure requirements in the application.

5. Interface Types: There are usually different interface types, such as pulse output, analog output, or digital communication interfaces. Select the appropriate interface type according to the actual requirements so as to integrate the flow data into the existing system.

6. Reliability and Maintainability: Choose products with high reliability. Learn about information on brand reputation, product quality, and after-sales service, and select products from reliable suppliers and brands.

7. Cost-effectiveness: Comprehensively consider factors such as price, performance, functions, and reliability, and choose products with high cost-performance ratio. Ensure that the performance of the selected equipment can meet the expected application requirements and the price is reasonable.

In addition to the above guidelines, other additional functions and features can also be considered, such as display screens, data recording functions, and automatic calibration functions. These functions may provide more convenience and functions according to the actual needs. It is recommended to consult professionals before purchasing to obtain more specific suggestions and guidance.