SIE Sensorik is offering a new, second-generation capacitive adhesive sensor in a new housing to replace the first-generation adhesive sensor successfully in use over the past 10 years or more. The new adhesive sensor from the SKF series in an ultra-flexible design is equally suitable for fill level interrogation through container walls, and for part detection from a distance.
The sensor adheres to a container wall for positive contact, resulting in a completely utilised active surface area. This ensures precise operating points even in the case of containers with geometrically irregular shapes. The configuration precludes any possibility of feedback between the active sensor surface and the container wall. Depending on the requirement, the SKF adhesive sensor is mounted horizontally (ultra-precise switching in response to even the tiniest of changes) or vertically (does not react to slight sloshing or wave formation triggered by vibrations in the system). Thanks to its flexibility, the sensor can also be formed as a ring-shaped sensor, and thus used for fill level detection in thin pipes with a minimum of 20 mm diameter.
To enable blocks of material to be detected at a distance, the sensor has to be turned during mounting in such a way that the adhesive layer is facing the sensing direction. This means that the SKF sensor can be affixed in a recess underneath a conveyor system, and thus scan the material concerned from below. The sensing distance can be adjusted between 0 and 10 mm.
With its rectilinear electrical field, the sensor can also be flush-mounted. For this purpose, the plastic housing, a mere 4 mm thick and measuring 90 x 16 mm, can adhere to any desired position on the container's wall.
In addition to adhesion-mounting, there is also an option for securing the sensor by means of two M3 bolts or with a velcro strip. The new 'Rigiflex' housing made of PUR/PC plastic also offers additional clamp-mounting options using fixing lugs at the side. The sensor can be bent several times without being damaged.
Electrical connections are via an ultra-flexible three-core cable and a plug to the sensor amplifier, where the sensitivity is also set. In addition, there is an option for direct evaluation using the sensor's own electronics, downstream electronics and secondary switchgear are available for standard rail mounting.
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