Shanghai Youfu engineers suggest that when selecting a level or level measuring instrument, several factors need to be considered to ensure that the selected instrument can be adapted to the specific operating conditions and media characteristics to provide accurate, reliable and cost-effective measurement results. Here are some key selection suggestions:
1.Properties of the medium under test:
Material properties (for solid level): particle size, bulk density, resting angle, flowability, conductivity, etc.
Liquid properties (for level measurement): density, viscosity, corrosivity, presence of impurities, vapor pressure, dielectric constant, temperature range, pressure class, etc.
2.Process conditions:
Measuring range: Determines the maximum and minimum measuring distance of the instrument.
Temperature & Pressure: The instrument needs to be able to operate stably at the temperature and pressure of the field operation.
Speed of level change: Rapidly changing levels may require a responsive instrument.
3.Installation Environment:
Silo or vessel structure: The effect of the internal structure on the beam (e.g. ultrasonic or radar instrumentation).
Space constraints on site: Determine how the meter will be installed (top, side, or bottom).
Safety and hygiene requirements: For example, in the food and pharmaceutical industries, non-contact measuring instruments that meet the relevant hygiene standards may be required.
4.Measurement technology selection:
Solid level measurement: Rotary type, tuning fork type, hammer type, radar type or capacitive type can be selected.
Liquid level measurement: differential pressure type (such as magnetic flap, float, float), vibration type, radar type, ultrasonic type, capacitive type, photoelectric instrument.
5.System Compatibility & Control Requirements:
Output signal type: analog signal (4-20mA), digital signal (HART, modbus, etc.) or switching signal.
Control accuracy and stability requirements: select high-precision instruments according to the requirements of the production process for measurement errors.
Remote monitoring and data integration: Whether the instrument needs to have network communication function to facilitate remote data transmission and integration into the control system.
6.Economy & Maintenance:
The balance between the initial investment cost and the expected service life.
Ease of maintenance and spare parts** availability.
To sum up, it is important to analyze the characteristics of the working conditions in detail when selecting a level or level measuring instrument, and make the optimal choice in combination with the technical performance and limitations of various instruments. At the same time, you should communicate closely with the best business provider to obtain professional technical support and advice.