Measuring techniques for point level detection
Level switch for point level detection
In a nutshell: Point level detection
In point level detection, level switches transmit a signal when a predefined level in a tank, silo or container is reached. A switching command then starts or stops filling equipment such as conveyor belts or pumps. When their output is converted into a binary signal, level switches can be integrated into a process control system.
What methods are used for point level detection?
The following measuring principles can be used for point level detection:
- Point level measurement with vibrating level switches
- Point level detection with capacitive level switches
- Point level detection with conductive point level switches
- Point level detection with microwave barrier
- Radiometric point level detection
Which measuring principle is the right one depends on where the level switch is to be used. We’re happy to assist you in finding the most suitable level switch for your application.
What are the advantages of VEGA level switches?
Where can level switches be used?
Typical areas of application for point level detection in the process industry are:
- Process vessels
- Storage tanks
- Overflow basins
There, the level switches serve as:
- Full detector, i.e. overfill protection: the switching command stops the filling process
- Empty detector: the switching command starts the filling process
- Dry run protection for pumps
- Leakage monitoring
- Oil/water detection
- Foam detection
- Interface detection
The measured media are usually:
- Pasty media
- Light bulk solids such as cement, flour, etc.
- Heavy bulk solids such as gravel, scree, etc.
What requirements must level switches meet?
Depending on the measuring principle and sensor configuration, point level sensors from VEGA can also be used in the following areas:
- Hazardous zones and safety-related systems up to SIL2
- Chemically aggressive media
- Abrasive or adhesive media
- Special hygienic applications in the food and pharmaceutical industries thanks to certified materials and process fittings
- Extreme temperature and pressure conditions