The high precision liquid flow meter purchase guide is as follows:

Define measurement requirements

  • Measurement medium: Determine the type of liquid to be measured, such as water, sewage, salt water, oil, natural gas, etc. Note that electromagnetic flow meters are suitable for the measurement of conductive liquids, but not for non-conductive liquids.
  • Flow range: Select the appropriate flow meter according to the actual flow range measured. Too large a flow range can lead to reduced measurement accuracy, and too small a flow range can make it more difficult to find a suitable flow meter.
  • Accuracy requirements: High-precision liquid flow meters usually require an accuracy of ±0.5% or higher. According to the accuracy requirements of actual application scenarios, choose the appropriate flow meter model.

Consider environmental conditions

  • Temperature range: Different models of flow meters have different temperature tolerance, and it is necessary to ensure that the selected model can adapt to the temperature range of the actual measurement environment.
  • Pressure range: The pressure capacity of the flow meter is also different, and the appropriate model should be selected according to the actual pressure conditions.
  • Corrosion: For corrosive liquids, it is necessary to choose the flow meter material with strong corrosion resistance, such as stainless steel, aluminum alloy, polytetrafluoroethylene, etc.

Select the brand and model

  • Brand reputation: Select well-known brands, such as Siemens, E+H, Emerson, Krohne, etc. Chinese brands Aister, Q&T and so on. These brands usually have richer technology accumulation and more stable product quality, and can provide good technical support and timely after-sales service.
  • Model comparison: After selecting the brand, it is necessary to further compare the different models of flow meters. Pay attention to its accuracy, repeatability, stability, material, electrical interface (such as power supply voltage, current signal, etc.) and communication protocol characteristics to ensure that the selected model can meet the actual needs.

Consider budget and costs

Allocate the budget reasonably to meet the measurement needs and environmental conditions. Choose cost-effective flow meters, while considering the operation and maintenance costs, choose products with low maintenance costs and long service life.

Understand the after-sales service policy

Understand the manufacturer’s after-sales service policy, including installation and commissioning, maintenance, technical support, etc. Choose a brand that can provide timely and effective after-sales service to ensure that it can be fully supported during use.

Refer to user reviews and success stories

  • User reviews: Through user reviews, industry reports and other channels to understand the brand’s market reputation and user satisfaction.
  • Successful cases: Pay attention to the successful cases of the brand in different industries and different applications, and understand its performance and application performance under various working conditions.

There are many kinds of high-precision liquid flow meters, and the following are some common types:

Turbine flow meter (0.2 class)

  • Principle: As the fluid flows through the turbine, the fluid rotates the impeller. The rotating speed of the impeller is proportional to the speed of the fluid, and the flow rate can be derived by measuring the rotational speed of the impeller.
  • Features: High precision, good repeatability, simple structure, fewer moving parts, high pressure resistance, wide measuring range, small size, light weight, small pressure loss, easy maintenance and so on.

Electromagnetic flow meter (0.2 class)

  • Principle: Based on Faraday’s electromagnetic induction principle, when the conductive fluid passes through the external magnetic field, it will generate an induced electromotive force, and the flow rate is calculated by measuring this electromotive force.
  • Features: Simple structure, no moving parts and choke parts, so no pressure loss. Corrosive media can be measured, and within a certain range of conductivity is not affected by temperature, viscosity and density of the measured medium. But only the flow of conductive liquid can be measured.

Coriolis Mass Flow meter (0.1 class)

  • Principle: Mass flow is measured directly using Coriolis force principle. When a fluid flows through a vibrating tube, a Coriolis force is generated that is proportional to the mass flow rate of the fluid.
  • Features: High precision, can achieve multimedia measurement and a variety of process parameters measurement. Widely used in petrochemical, pharmaceutical, food and other industries.

To sum up, the purchase of high-precision liquid flow timing, need to consider the measurement needs, environmental conditions, brand and model, budget and cost, and after-sales service and other factors. Make an informed choice based on the actual situation by carefully comparing different brands and models of products.

If you want to know more about the flow meter or flow meter selection, please consult the Aister flow meter manufacturer email: sales@aistermeter.com for help.