English
русскийSubmersible level transmitters are designed to measure the level of a liquid within a tank or vessel. However, the presence of foam, bubbles, or solids in the liquid can interfere with accurate level measurement.
Foam and Bubbles
Ultrasonic Technology: Employs high-frequency sound waves to determine the distance to the liquid surface. Relatively unaffected by foam and bubbles due to sound waves' ability to penetrate through these substances. However, excessive foam or bubbles can still interfere with accuracy. Advanced signal processing algorithms can help mitigate these effects.
Radar Technology: Utilizes electromagnetic waves to measure liquid level. Highly resistant to foam and bubbles as these materials have minimal impact on the propagation of electromagnetic waves. Offers superior performance in challenging environments with heavy foaming conditions.
Hydrostatic Pressure Technology: Measures liquid level based on the pressure exerted by the liquid column. Can be affected by foam and bubbles, as these substances reduce the effective liquid density. Compensation techniques or specialized sensors can be employed to improve accuracy in foaming conditions.
Solids
Material Compatibility: Transmitters constructed with corrosion-resistant materials (e.g., stainless steel, Hastelloy) are suitable for liquids containing abrasive or corrosive solids. The choice of material depends on the specific characteristics of the solids (e.g., size, shape, abrasiveness).
Sensor Location: Strategic placement of the sensor can minimize exposure to solids. For example, mounting the sensor in a clean zone or using a protective sleeve can help. Considerations include the sedimentation rate of solids and the desired measurement point.
Cleaning and Maintenance: Regular cleaning and inspection are essential to prevent sensor fouling and maintain accuracy. Cleaning frequency depends on the concentration and type of solids present in the liquid. Self-cleaning mechanisms (e.g., ultrasonic transducers) can be incorporated into the transmitter design for automated cleaning.
