Capacitive sensors
Proximity switch for non-contact detection of liquid as well as solid objects and bulk solids
Product portfolio
Sensors in a metal housing
- Cylindrical (Ø12 to 30 mm) and rectangular (20 mm) sensor designs
- Flush mount
- Sensitivity configurable variants with defined default switching point
- Switching distance up to 15 mm
Sensors in a plastic housing
- Cylindrical (Ø12 to 30 mm) and rectangular (30 mm) sensors
- Flush / non-flush mount
Sensitivity configurable - Variants with defined default switching point
- Switching distance up to 30 mm
Particularly flat design
- 52,4 × 25 × 6 mm
- Flush mount
- Flexible and easy installation with a unique mounting frame
- Optional cascading of several sensors
- Switching distance up to 15 mm
Your benefits
Outstanding longevity and high process safety by non-contact sensing principle
Switching distance up to 30 mm and particularly flat design enable installation in a protected position and close to the process.
Reliable detection of many different objects and materials
Independent of color, gloss, or surface properties Insensitive to dust and dirt Sensors with flush installation are especially recommended for non-conductive (dielectric) media Designs for non-flush installation are ideal for detecting conductive media and filling levels
Applications
Presence detection of plastic boxes
- Easy installation of the sensor in a protected position
- Large sensing distances ensure reliable box detection
- Resistant to dust and dirt
Wafer detection in solar cell manufacturing facilities
- Reliable wafer detection thanks to large sensing distances
- Flush mounting is possible thanks to the flat design.
- Detection regardless of the transparency or brightness of the objects
Granulate bulk goods detection in injection molding plants
- Thanks to their rugged design, these sensors are protected against mechanical abrasion.
- Surface-independent detection
- Fast and easy installation
Technology
The capacitive sensor basically functions like an open capacitor. An electrical field is formed between the measuring electrode and the GND electrode. If a material with a dielectric constant εr greater than air enters the electrical field, the capacity of the field increases depending on the εr of this material. The electronics measure this capacity increase, the generated signal is conditioned during subsequent signal processing and causes output switching at a corresponding magnitude
Flush-mountable and non-flush mounting procedure
Flush mounting of flush-mountable capacitive sensors is possible in all materials. The minimum distance between the sensors must be observed. For non-flush mountable capacitive sensors, a free zone must be created around the sensor head which must not contain any damping material.
