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ProPak Philippines 2025
February 12-15, 2025
Measurement Technologies Corporation at ProPak Philippines 2025 – Metro Manila, Philippines
Level Switch
What are Level Switches?
A level switch (often called a level sensor) is a device often installed in certain tanks, containers and vessels to trigger an alarm when the solid or liquid in the storage device reaches a certain level. Using a PNP/NPNM output or a relay it can also start of stop the discharging of a material or a fluid if connected to some type of solid state or programmable logic controller.
Are Level Switches Used for Monitoring Intermediate Levels in a Tank?
No! Level switches are not designed to measure continuous level, however, many continuous level devices also have options to act as level switches. If this is the case, then why opt for a level switch? The reason to buy a level switch is often economic reasons. A level switch often costs less than a level transmitter. In addition, a level switch is often much easier to understand and install.
What are some different types of level switches popular in the industry? Some of the most common types which are widely used are:
There are other types of level switches in use for special applications in a process that requires. The selection of level switch types is often based on the existing technology in use. If the existing type of level switch has been found to be reliable over extended periods with little maintenance required it is common for operators to keep using the same type of switch.
- Rotating Paddle Level Switches
- Capacitance Type Level Switches
- Vibrating Fork Level Switches
- Float Level Switches
- Conductive Type Level Switches
- Ultrasonic Type Level Switches
- Pressure Based Switches
How does a vibrating fork level switch work?
A vibrating fork level switch operates by using a pair of prongs (the “fork”) that vibrate at a specific frequency. When the fork comes into contact with a liquid or solid material, the frequency of the vibration changes. This change is detected by the internal electronics, which then trigger a signal, such as an alarm or a control action, to indicate the presence of material.
For more information, please watch the video below!
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A level sensor can also be implemented for use as a level switch.
