Vibrating Fork & Capacitive Switches
Capacitive Switches
Principle
Capacitive switches work by detecting changes in a magnetic field when material enters it, allowing them to sense the presence of solids or liquids.
Advantages
- Usable with both solids and liquids
- Can be mounted in any orientation (top, bottom, or side)
- No moving parts
- Suitable for aggressive media
- Some models can handle coating or material buildup
Disadvantages
- Requires materials that are conductive and have a dielectric constant significantly different from air
Vibrating Fork Switches
Principle
A vibrating fork sensor extends into your vessel. When your media contacts the fork, it alters the vibration’s frequency and amplitude, triggering the switch.
Advantages
- Compatible with nearly all solids and liquids
- Can be mounted in any orientation
- Available in various lengths and sizes
Disadvantages
- Not effective for detecting very fine solid particles
- Contains a vibration motor, which may slightly reduce the sensor’s lifespan over time